年次大会
Online ISSN : 2424-2667
ISSN-L : 2424-2667
2017
選択された号の論文の1214件中301~350を表示しています
  • 勝又 大介, 木村 鉄也, 智田 崇文
    セッションID: G1400102
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    In the steel industry, we organize ingots orders to molten steels which are manufacturing units. And this organization is called molten steel organization. Molten steel organization is a combination problem that considers multiple evaluations and manufacturing constraints and human have to spend a lot of time to adjust the initial solution obtained from the expert system. So we developed automatic molten steel organization system applied branch and bound to make multiple evaluation easy. We confirmed that good results such as productivity improvement are obtained compared with conventional approach.

  • 熊野谿 真帆, 島田 直弥, 中本 圭一
    セッションID: G1400103
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    In the field of machining, multi-tasking machine tools have been popular because of their high flexibility and productivity. Thus, it is indispensable for the operator of machine tools to avoid collisions among complex machine structure and workpieces. In order to solve this problem, machine simulator is widely used before machining operations. In a commercial machine simulator, however, unexpected collisions often occur when the actual setup of workpiece or jig differs from the 3D models prepared in advance. On the other hand, the authors propose a machine simulator utilizing 3D models created by measuring the shapes of workpiece and jig on the machine tool. In case the workpiece differs from the assumed one, it is required to determine the position and orientation of target shape based on the obtained objects for modification of NC programs. Thus, this paper deals with a decision method of suitable position and orientation of target shape according to complicated workpiece shape by taking into account machining efficiency.

  • 小宮 賢士, 金子 順一, 横山 哲也, 浅野 哲也, 東野 千春, 堀尾 健一郎
    セッションID: G1400104
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    The deformation of the object to be cut has a significant influence on the dimensional accuracy of the finished shape, especially when it is low stiffness. Various attempts have been made to predict the dimensional error after cutting with respect to such problems, but these attempts have limited adaptability and require a lot of calculation time and operation time. In this research, we developed a new method to combine these methods with direct manipulation of stiffness matrix, cooperation with cutting simulation and large-scale parallelization by GPU. By this method, deformation simulation was automated and speeded up, and calculation time and operation time were reduced.

  • 市川 康平, 金子 順一, 長谷川 雅信, 岩崎 孝行, 堀尾 健一郎
    セッションID: G1400105
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    In the finishing of complex deep groove machining, we use 5-axis machine tools. At that time, posture planning in NC program generation, it has been done manually due to lead angle control in process, or rapid turning at the time of turning by round trip route in each surface inside groove. In our previous studies, we propose a method to automate by assuming the possible range of posture by the range of one pivot axis of machine tool and planning posture passing inside. In this method, we automation of posture planning without interference and realized continuous motion in machining on planning axis by planning in machine coordinate space. However, there was a problem that a rapid turning occurred on the other axis when feed turning. Therefore, in this report, we propose a method of minimizing the motion of the pivot axis by evaluating the motion of the other axis in the feed turning and selection the path with the minimum posture.

  • 追立 真吾
    セッションID: G1400106
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    Recently, a concept called edge computing has been attracting attention. Edge computing is intended to improve a computing system's response to terminals by distributing data processing between nodes provided near the site, rather than having all data processed in a cloud. In this technology, we have to design the locations of data processing. The main goal of this research is to make a platform to design the data processing arrangement. This paper describes the formulation of the data processing arrangement as the constraint optimization problem, and presents evaluation of the platform.

  • 中川 秀夫, 青木 伸也
    セッションID: G1500101
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    At a presentation for general audience, a lot of skills which can appeal for the contents to them sufficiently are necessary for the presenter. To exclude such individual variation, the presenting work was automated by using presentation robot. This robot presentation system adopted the method good presenter was doing, that is the way to take audience's concentration ratio for his presentation and change the story of presentation. The concentration ratio of audience was calculated from ingredient in horizontal and vertical direction of optical flow in the camera image of the audience. As a result, it was possible to get the numerical value which is proportional to a concentration ratio. And we constructed the presentation robot system which changes the order of the PPT slide by the concentration ratio of the audience.

  • (小型化と作業性の向上)
    松井 洋樹, 西堀 研人, 篠原 主勲, 西堀 賢司
    セッションID: G1500102
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    There is a serious problem of aging of the craftsmen who have tie-dyeing technique of Japanese traditional craft “Arimatsu-Narumi Shibori”. In substitution for tying process by thread on tie dyeing, we proposed usage of elastic cap with different thickness at the both ends. We made small-size robots that installed the elastic caps on the cloth using two kinds of actuators. To improve the work efficiency, a cap cartridge and a separator between the cloth and a needle were adopted. It was confirmed that our Shibori robots realized the tie-dyeing pattern similar to the conventional method using thread.

  • 藤井 直樹, 長谷川 浩志
    セッションID: G1500103
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    In Japan, the elderly is increasing and laborer is decreasing. Many Service robots are need as robots which be able to live with human by many people. In particular, Biped Robot are payed attention to feature which be able to use the facilities, be a friendly appearance, provide general-purpose services, by many people. Biped Robot consumes high energy. Biped Robot always use high energy which give each joint to torque by actuater. From the above, the Biped Robot has a big problem that running time is very short. we have designed a labor saving mechanism which imitates human structure, and thought approach which imitates human action. in the simulation, we created a model to which have approaches and labor saving mechanism. And, we confirmed the amount of change in torque in the analysis. In the simulation, we confirmed that consumed energy is decreased by these approaches and labor saving mechanism we proposed.

  • 山田 孝公, 竹澤 聡, 高島 昭彦
    セッションID: G1500104
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー
  • 久芳 頼正, 石原 学, 久保田 修平, 角田 紘輔, 仁田 佳宏, 松本 直文, 山城 光雄
    セッションID: G1500106
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー
  • 岩野 真拓, 立矢 宏, 鈴木 陽介
    セッションID: G1500107
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    This study proposes a method of generating the optimized motion of robots by heuristic and learning program. Previously, we proposed a heuristic program that can determine changes of the displacement of a robot with respect to time, in order to reduce the electrical energy or peak current value occurred in motors. As the method can optimize the motion of a robot by evaluating the measured values, it does not need the kinetic and dynamic models of a robot, which are generally difficult to be obtained. However, the proposed method needs to drive robots every time, when determining the appropriate motion. Thus, this study proposes the method for robots to learn the appropriate motion from the data occurred during heuristic process. In concrete, robots construct neural network by using the data obtained with heuristic program as learning data. As a result, robots can determine the appropriate motion without heuristic process.

  • 西村 望, 肥田 博隆, 神野 伊策
    セッションID: G1600102
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    Recently, development of insect scale robots has been attracting attention. These robots are expected to be used for inspection or sensing in narrow and danger places where human cannot enter. In this study, we fabricated and evaluated piezoelectric thin film actuators intended for flapping wing insect scale robot. We firstly report a FEM analysis results of piezoelectric PZT thin-film actuators. To verify this analysis results, we deposited PZT thin films on micro-fabricated stainless steel substrates and evaluated their crystal structure, electrical properties, and piezoelectric properties of PZT thin films. X-ray diffraction measurements reveal that the PZT thin films have a polycrystalline perovskite structure. The relative dielectric constant of the PZT thin films was 240. FEM analysis results are in good agreement with the resonant frequency. The angular displacement are less than 1° in all measurement points driven by resonant frequency (5Vpp, 2.095 and 2.257 kHz).

  • 西 崇仁, 伊藤 喬, 梅垣 俊仁, 肥田 博隆, 神野 伊策
    セッションID: G1600103
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    In this study, we fabricated piezoelectric vibration energy harvesters (PVEHs) composed of PZT thin films on stainless steel foils, and investigated the optimal structures for the high output power aiming for shoe-mounted power generators. The shoe-mounted PVEHs have been thought to be one of the key applications as battery-free wearable systems. As a pre-stage of shoe-mounted PVEHs, we evaluated PVEHs under sinusoidal excitation to optimize the design of the PVEHs. We studied on the theoretical model of PVEHs from electromechanical coupling system to satisfy the required specification. Thinner substrates thickness, longer length and narrower width is preferable for high output with a same size of the mass and electrode area. Theoretical model indicated that the optimal electrode length is two-third of the cantilever length and a PZT thickness is about two-fifth of the substrate thickness. We confirmed the good agreement between theoretical and experimental values.

  • 藤原 崇博, 川阪 僚, 宇佐美 太基, 小金沢 新治, 谷 弘詞, 呂 仁国, 多川 則男
    セッションID: G1600104
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    Recent years, small-sized flying objects are expected to be utilized for observation in narrow places such as inside of ducts. We focused on bees with superior flight performance among small insects and designed an insect-size flying object with a flapping mechanism. We also analyzed the generated lift force when wings flapped. From the simulation results, we found that it is important to generate a large vortex at the edge of the wing film in order to obtain a large lift force.

  • 甲斐 仁智, 岡村 陽介, 槌谷 和義, 橋本 巨, 落合 成行, 砂見 雄太
    セッションID: G1600105
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    In this study, we examined the fabrication of polymer ultra-thin films (nanosheet) using a micro gravure printing method. Conveying speed of the plastic film substrate, the concentration of solution, rotating speed of the micro gravure roll was investigated experimentally for effects on the film thickness of the nanosheets. The PET film (thickness 100 μm, width 100 mm) as substrate was placed through roller. After that, the tension load was applied to film. And then, Polyvinyl alcohol (PVA) was coated on the PET film in order to release the nanosheets from the PET film by sacrificial layer method. After that, Polylactic acid (PLLA) was coated. Thickness of nanosheets was measured using a stylus type surface profile. Furthermore, In the field of micro / nano, nanoimprint technology which can press a mold having a pattern of irregularities of several tens [nm] level to the resin and transfer the pattern as it is attracts attentionin order to further enhance the functionality of the nanosheets, a nanosheets having a fine structure was produced using a hot press method and a roll thermal nanoimprinting method. As a result, since the shape of the mold could be transferred, it was possible to fabricate a nanosheets having a microstructure by roll nanoimprinting method.

  • 村松 慶一, 関根 駿介, 楓 和憲, 綿貫 啓一
    セッションID: G1600106
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー
  • 中村 瑞穂, 三橋 郁, 千葉 正伸, 杉本 旭
    セッションID: G1700101
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    It has passed more than ten years since the risk assessment was made mandatory to be a non-binding target by the Industrial Safety and Health Act. Accordingly, various measures have been taken by domestic companies until today. On the other hand, the risk assessment is importantly positioned by ISO 12100 (Safety of Machinery - Basic Concepts, General Principles for Design, Risk Assessment and Risk Reduction) and ISO 45001 (OSHMS, Occupational Safety and Health Management Systems - Requirements). Generally, it may be said that the risk assessment is designed to attain the “tolerable risk” as defined by ISO/TEC Guide 51. However, even if risk reduction is implemented, as long as residual risk remains, fatal accidents due to the residual risk cannot be prevented completely. On another front, the notion that a purpose of the risk assessment is to determine the stop category, which is accepted as a critical view to global security, seems not to be understood completely in Japan. In this study, therefore, the authors give consideration to the relations between the risk assessment and the stop category, and provide further insights into the stop category to be determined by safety assured by means of control based on “stop prior to accident” as the common principle.

  • 三村 巧, 中村 瑞穂, 千葉 正伸, 原 圭吾
    セッションID: G1700102
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー
  • 福田 隆文, 布目 龍一, 浅川 廣之進, 芳司 俊郎, 木村 哲也
    セッションID: G1700103
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー
  • ―許容リスクによって規定される停止カテゴリ―
    杉本 旭, 大塚 くみ子, 芳司 俊郎
    セッションID: G1700201
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    Unintended results include, for example, cases of damage events such as railroad derailment accidents and unintended consequences incidental to the event, for example, numerous casualties caused by derailment accidents, irreparable circumstances (True damages) exist, and if only the former, repeating accidents may be permitted while liquidating the responsibility under the condition of acceptable risk, but the latter is not allowed to experience never, it is permissible originally Risk theory that accepts accident under the condition of risk does not apply. In this paper, it is indicated that the damage theory (result) which originally experience is not permitted exists in the accident, the risk theory presuming the result theory can not be applied, the necessity and the possibility of safety engineering which should respond to such situation .

  • 古杉 旭, 佐々木 友宏, 三橋 郁, 千葉 正伸, 原 圭吾, 中村 瑞穂
    セッションID: G1700202
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー
  • 高岡 叡史
    セッションID: G1700203
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    Consider accidents based on risk concept. As a prerequisite to the concept of risk, there is a premise that loss can be quantitatively evaluated, but in reality, such losses are not the only ones. Therefore, focusing on the loss that the user wishes to avoid, in particular, regarding the safety measures at the operation stage, the necessity of a safety structure due to the machine stop is clarified. Also, we consider losses due to machine stop as stopping risk and discuss them.

  • 猪野 款聖, 佐々木 友宏, 三橋 郁, 石塚 禎, 市川 修, 千葉 正伸, 中村 瑞穂
    セッションID: G1700204
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー
  • 清田 高徳, 杉村 裕希, 平野 力, 南山 靖博, 杉本 旭
    セッションID: G1700205
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    This paper proposes a high-safety power-assisted cart that can be operated on a slope by applying little-changed manual power even if the inclination changes. In this cart, balancing operation to compensate for load increments due to the increase in the inclination by using a spring is achieved in the safe state with the cart held by the brake application, while dangerous moving operation is performed by safe human power. Firstly, the principle of a power assist system using a coil spring is introduced. Secondly, the mechanism and control sequence of the power-assisted cart is described. Lastly, the effectiveness of the power-assisted cart is verified by experiments.

  • 舘下 遼太, 吉田 雅典
    セッションID: G1700301
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    Agitation impellers for liquid-phase mixing in chemical processes were designed based on a conventional disk turbine impeller with six flat blades which sucks liquid across the planes including the upper and lower edges of the blades. The altered impellers have structures for the inflow entrance to be confined partially or fully. We call these “partially and fully closed impellers”, respectively, and the prototype “open impeller”. Liquid flows in the impeller rotational region of a baffled vessel with the closed impellers were examined for the flow path between the neighboring blades of the rotating impeller and the internal flows were compared with that with the open impeller. Energy consideration in terms of the dimensionless parameters on the basis of the flow and power measurements demonstrated that the partially closed impeller was successful in the flow and head characteristics. The power transmission efficiency were enhanced notably for the fully closed impeller because of a reduced viscous loss.

  • 溝部 祐, 森 圭史, 中村 赳教, 齊藤 俊
    セッションID: G1700302
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    To avoid discontinuation during long-term continuous operation in plants, a reliable monitoring system for the state diagnosis is strongly expected. However, occurring troubles of various facilities in a plant aren't simple. We proposed a sophisticated estimation method to diagnosis the state for reciprocating compressors. Our monitoring system uses both the measuring data in the factory and the analytical results based on the mathematical model, which can express the dynamic behavior about the reciprocating compressor. The mathematical model has multi degrees of freedom and the model parameters are identified to estimate the state change. To realize the reliable monitoring, we have to establish estimation and diagnosis method for any change of the operation state. In this paper, we discuss a dynamic model that is able to analyze the dynamic responses of the reciprocating compressor during operation based on the measurement data. We show that the viscous damping coefficients are rather smaller than the spring constants of the parallel elements and the only behavior in the horizontal direction is affected by the damping character. To express the vertical acceleration in time history, we examine the dependency of time histories about acceleration during operation upon the crank angle and propose modified generating forces in the connecting parts. Comparing the numerical results with the experimental results by the small experimental equipment, we examine influence on dynamic responses by the existence of rotational motion of the proposed model.

  • 上島 清正, 岩崎 篤
    セッションID: G1700303
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    The outdoor structures such as the infrastructures are indispensable to human life. Periodical usually inspection is used to prevent those failures. However, those numbers are enormous. Therefore, the adjustment of the inspection interval is necessary by a probability of failure evaluation. Since the qualitative visual inspection is mainly used as the inspection method for the infrastructure, quantitative evaluation of probability of failure is difficult but important. Then, in this research, quantitative evaluation method of probability of failure from quantitative inspection result using Bayesian theorem is proposed.

  • 髙橋 晶世, 嶋田 徹
    セッションID: G1700304
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    It is showed that more safety of the propulsion system is effective for drastic safety improvement of the space transportation system. In order to achieve increasing safety of the propulsion system, it is showed that necessarily of adopt the boundary layer combustion type hybrid rocket which is essentially non-explosive and that it is difficult in the conventional essentially explosive propulsion system. Specifically, it is first showed the importance of the propulsion system to the safety of the space transportation system by hazard analysis. Next, it is summarized the safety measures related to the currently adopted propulsion system, and considered possible countermeasures to further improve its safety. At this time, it is investigated that cases of past accidents and used them as reference for countermeasure consideration. Furthermore, based on the resilience engineering method, countermeasures are evaluated using safety concepts such as Safety-I and Safety-II, and it is showed that the measures of Safety-II are excellent.

  • 小山 達弥, 池田 充
    セッションID: G1800102
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー
  • 戸田 均, 小倉 崇生
    セッションID: G1800103
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    In order to investigate traffic accidents caused by driving while the tire air pressure is low, we must know the effect of tire pressure on vehicle behavior. Many literatures show the effect of tire air pressure on rolling resistance and cornering force. However, there are few literatures showing the effect of only one underinflated tire on vehicle behavior. Therefore, we conducted experiments on a vehicle by changing the air pressure of only one tire. In the test, a full braking test and a cornering performance test were carried out using a compact car with an oblateness rate of 55% of the tire. As a result, it was confirmed that the stop distance becomes longer as the tire air pressure decreases. Moreover, it was confirmed that the tendency of understeer becomes stronger when the air pressure of the front wheels on the side opposite to the turning direction is decreasing.

  • 塩田 勝利, 及川 祐也
    セッションID: G1800104
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    In this study, we constructed a train running analysis model in consideration of only the linear shape of turnouts in order to evaluate train running safety on turnouts easily. Moreover, we also constructed an automatic creation tool of a simple model for creating simple turnout models automatically by setting conditions for determining the linearity of turnouts. We could create arbitrary shapes of turnouts easily and evaluate train running safety on turnouts in advance by using the tool. We created a turnout model and carry out a trial calculation and compared the calculation result with the result of past running tests. As a result, we found that the calculation result and the running test result were roughly equivalent. From this, we could utilize the train running analysis model and the automatic creation tool for the investigation of the new structure of turnouts. In the future, we would expand the tool by adding such input items on excess width of the track gauge and track irregularity.

  • 宍戸 昌子
    セッションID: G1800201
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー
  • 河合 浩幸, 相馬 仁
    セッションID: G1800202
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    A steer-by-wire technology creates new automobile steering control that was impossible in past days. Since this technology can vary the characteristics of the steering system, the characteristics adapted to drivers and running conditions can be made. In this study, we conduct a simulation of the variable characteristics steering system in an emergency lane change to avoid an obstacle on a road. We use PID control for the variable characteristics steering system, and the values of the proportional gain and the differential gain are determined moment by moment by fuzzy control. The usefulness of the variable characeristics steering system with fuzzy gain-switching is clarified.

  • 三浦 諒, 相馬 仁
    セッションID: G1800203
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    Simulation analysis for automatic collision avoidance system that is a driver assist system of Intelligent Transport Systems (ITS) is conducted in this paper. The automatic collision avoidance system avoids the collision by using automatic steering and/or automatic braking, when there is possibility of the collision with a pedestrian. We treat the situation in which a pedestrian walks across a road. The avoidance procedures of the system are two ways as follows: One is to brake continuously while the automatic steering, which is called “braking continuation method”. The other is to stop the brake when the automatic steering starts, which is called “braking suspension method”. Vehicle velocity, time to collision (TTC), road friction coefficient, automatic steering start timing and the deceleration of the automatic braking are varied as simulation parameters. Avoidance success rate is calculated from the simulation. Thus, from the calculation results, we propose the design table that is described the optimum avoidance method to the running conditions.

  • 田中 博文, 三和 雅史
    セッションID: G1800204
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    A prediction of growth of rail surface roughness is important in realizing efficient maintenance activity for the rail corrugation. In this study, at first, we measured the rail surface roughness data due to the rail corrugation in the track. These data was measured for a long term. Next, we analyzed the tendency of these data by statistical method, and we developed a following prediction model that reproduces three stages of rail corrugation growth. At the early stage, the rail surface roughness grows up slowly. Afterwards, the rail surface roughness grows up rapidly, and the growth is gradual again at the middle stage. At the final stage, its growth almost saturated. Finally, we confirmed that tendency of the rail corrugation growth was able to be modeled by a growth curve by fitting the field data.

  • 江藤 亮輔, 下野 祐豪, 山川 淳也
    セッションID: G1800205
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    A driving force distribution and traction control system have been developed in order to suppress a slippage of a tire and improve traveling performance of a vehicle. This paper proposes a method combining the driving force distribution based on tire workload and traction control system on dry sand. In the traction control system, torque of tires are controlled using the slip ratio, and the vehicle velocity is needed in order to calculate the slip ratio. However, the off-road vehicle is generally the four wheel drive vehicle, and the vehicle velocity is not able to be detected using a passive wheel. It was found that when the driving force distribution is applied, minimum circumferential velocity of all tires was approximately the same as the vehicle velocity by straight-traveling tests using a model vehicle with the driving force distribution on a flat and sandy ground. Therefore, the minimum circumferential velocity of all tires was used as the vehicle velocity in this study. Straight-traveling tests using a model vehicle with the driving force distribution and the traction control system to evaluate the effectiveness of the proposed method. The experimental results revel that the proposed method improves traveling performance.

  • (センサシステムの評価)
    藤岡 美博, 本多 将和, 福島 志斗, 池田 総一郎, 小吹 健志, 泉 大樹, 石原 克奎, 齊藤 陽平
    セッションID: G1800301
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    In this research, we developed a “motorcycle riding skill visualization device”. While riding a motorcycle, rider's body exerts forces on several points of motorcycle. The forces by the professional riders are quite different than by the beginners. Visualization of forces gives a clear image of what kind of operation the driver performing. In the visualization system, pressure sensors are installed on the different parts of motorcycle, such as tank, steps, handles. These sensors are installed with jigs which are manufactured. Output signals from the sensors are amplified and are then send to PC and visualized on the display. The visualization device helps beginners to improve their driving skill in motorcycle driving courses. This paper describes the sensor system which is installed on the experimental motorcycle. In the experiments, some veteran riders and beginners ride the experimental motorcycle. The several experimental results are shown in this paper. The sensor system clarifies the difference between professional riders' skill and beginners' skill.

  • 池田 充, 小山 達弥
    セッションID: G1800302
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    In order to derive a finite element model of contact lines installed along track with curve sections, an evaluation method of the fully three-dimensional static geometry of contact lines based on the non-linear FEM was developed. This paper shows the outline of algorism of this method, and indicates the result of trial calculation. This program can be a useful tool for the design of a catenary system taking account of the precise three-dimensional configuration of wires and fittings.

  • 西宮 裕騎
    セッションID: G1800303
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    This study describes the construction of FEM analysis model simulating new continuous measuring method of wheel and rail contact force in railway vehicle. In railway track design appraisal, it is important to accurately measure a wheel / rail contact force. There is the new continuous measuring method as one method of measuring contact force from railway vehicle, and it is widely used in Japan. In the new continuous measuring method, contact forces are calculated based on the strains of the wheel and the contact position between the wheel and the rail. In this method, the wheel / rail contact position is assumed to be just below the center of the wheel. However, under conditions where the contact position is significantly different from this assumption, an error is included in the calculated value. In this study, we have modeled the wheelset of the new continuous measuring method by FEM and constructed an analytical method to convert from the analyzed strain to contact forces. Furthermore, the running simulation was carried out under conditions that the contact position was different from the assumed condition, and the difference in contact force was confirmed. As a result, our results confirmed that a difference of 8 to 30% occurs in the obtained contact forces.

  • 麻生 篤, 田中 宏明
    セッションID: G1800304
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    This paper shows a theoretical formulation of attack angle of the wing twist morphing structure considering its skins and validation of the formula through numerical simulations. In our previous study, we have proposed a concept of wing twist morphing structure using a double-tube cylinder. By applying the double-tube cylinder as the spar, we can change the ratio of twist-angle per each section arbitrarily to enhance their flight performance in accordance with their various flight conditions. The double-tube cylinder is composed of inner-spar and outer-spar. They are connected at the ends of the wing-tip side. The inner-spar transmits the torque from the motor which connected at the wing-root side to outer-spar. The outer-spar is the shape variable member having open- and closed-section. Also we have developed the design method and confirmed the validation of it through twisting experiment. However, the skin was not taken into consideration in the previous design method. Therefore, we modified the previous formula and take the effect of skins into account. This structure is required to be twistable, therefore the skin has a slit at the trailing edge to decrease twisting rigidity and soft materials are applied to fill the inside of the skins in order to enhance their bending rigidity.

  • 高野 悠一郞, 瀧 聖人, 長濱 大空, 渡邉 力夫, 宮坂 明宏
    セッションID: G1900101
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    In order to offer new mobile communication services, or to obtain high-resolution image picture for radio astronomy, it is necessary to develop satellite with large aperture reflectors and high accuracy. While at the same time weight must be reduced within the weight budget determined from the system requirements. Conventional study has been proposed a new surface forming concept in which the cable network is assembled by tensile and compression members. As a result, the effectiveness of the proposed method for reducing the weight of the antenna structure has been analytically shown. However, we must verify based on an experiment by using a cable network model and examine the application possibility of this method. Therefore, this paper describes manufacture a prototype model based on design analysis for the proposed weight reduction method and verify based on an experiment the effectiveness of the compression members.

  • 瀧 聖人, 安井 規泰, 宮坂 明宏
    セッションID: G1900102
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    For the development of space structures, it is indispensable to evaluate the development characteristics in orbit by a ground test equipment having the function of gravity compensation. However, in the hanging type gravity compensation apparatus mainly used so far, there is an influence of friction of a pulley suspending the structure to be deployed, and the inertial mass due to counterweight and shaking of the wire, to obtain sufficient development evaluation May be difficult. Therefore, we propose a gravity compensator of a new three-dimensional deployed structure and evaluated its feasibility. In this report, we describe the equipment configuration and system requirements, and show the characteristics of gravity compensation from the driving test results using the simple model. As a result, the proposed gravity compensation device has the performance obtained by prediction, and it is expected that it can be applied as a gravity compensation device for three-dimensional deployment structure.

  • 安井 規泰, 高野 悠一郎, 宮坂 明宏
    セッションID: G1900103
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    Cable mesh antenna had been applied to the ETS-VIII and the HALCA. The trend of antennas technology is large aperture diameter and using at high frequency band. Therefore, cable mesh antenna is required for high surface accuracy and light weight. In addition, the radio frequency of antennas depends on surface accuracy. In order to design antennas of high gain and high directivity, the cable network structure is one of the important structural elements. However, surface error of cable mesh antenna generates for several factors, manufactural error, deployment repeatability, plane approximation and orbital deformation. Particularly, thermal deformation accounts for a major factor of surface accuracy. The deformation of deployable structure generates degradation of surface accuracy. Therefore, the shape stabilization of the cable network structure is important for high accuracy antennas. However, conventional study had been not obtained that relationship between shape stabilization of the cable network structure and cable rigidity. Therefore, this paper described a design method of cable network structure considering the deformation of deployable structure.

  • 橋本 博文
    セッションID: G1900104
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー
  • 中島 曜, 坂本 勇樹, 佐藤 哲也, 小林 弘明, 多根 翔平, 箕手 一眞, 古市 敦大, 樺山 昂生, 辻村 光樹
    セッションID: G1900105
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    A capacitance sensor for void fraction adopting asymmetric helical electrodes is proposed to avoid adverse effects of gas-liquid two phase flow distribution on measurement accuracy. In this research, in addition to verification in the Stratified flow already performed, the accuracy in the Dispersed flow was confirmed using an Electric Field Analysis (EFA). The analysis was performed for the proposed three types of models (Helical type, Square type, Hexagonal type). In order to simulate the Dispersed flow, the fluid element was divided into 325 parts and the gas - liquid distribution was randomly assigned. In the result of the electric field analysis, the maximum EFA error was 7.07% in the case of Helical type, and the standard deviation was 1.62% even in the model with the lowest precision. Therefore, it was confirmed that the capacitance sensor for void fraction adopting asymmetric helical electrodes can maintain accuracy and precision even in the Distributed flow.

  • 森 浩一
    セッションID: G1900106
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー
  • 中山 宜典
    セッションID: G1900107
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー
  • 塚本 貴城, 田中 秀治
    セッションID: G2200101
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    This paper reports a novel frequency modulated (FM)/whole angle(WA) gyroscope using independently controlled CW/CCW mode oscillations on a single resonator. A CW/CCW mode separator was developed and each mode was independently excited on a single resonator. Applied angular rate was detected by the FM-mode operation with excellent linearity. The scale factor had almost no temperature dependency. In addition, the rotation angle was directly detected by the WA-mode operation with excellent linearity.

  • 佐藤 樹, 村岡 幹夫, 倉林 徹
    セッションID: G2200102
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    With the development of advanced information society, electromagnetic waves used in various electronic devices have spread to high-frequency band, and new electromagnetic wave absorbers are required. Recently, the authors developed a method for fabricating transparent metallic nanocoil web. The transparent metallic nanocoil web is expected to be applied as a transparent electromagnetic wave absorber. In this study, the transmittance and the reflectance of Pt nanocoil web in the terahertz region were measured using a Fourier transform infrared spectrophotometer, and the absorption was calculated. The absorption was found to increase with the increasing density of Pt nanocoil web. Furthermore, it was found that it has superior electromagnetic wave absorption characteristics and high transparency as compared with Pt nanofiber web and Pt film.

  • 黒崎 裕太, 奥村 哲也, 林 秀千人, 永安 晃尚
    セッションID: G2200103
    発行日: 2017年
    公開日: 2018/03/25
    会議録・要旨集 フリー

    Concentration polarization, which occurs at the surface of osmosis membrane utilized in seawater desalination, decreases the filtration. The effects of the external electric fields were examined to decrease concentration polarization. In this study, The computer simulation using lattice Boltzmann method ( LBM ) was conducted to clarify the ion behaviors in the vicinity of the membrane surface. To simulate ion transport adequately, advection with water flow, diffusion in concentration gradient and migration in electric field were considered in the calculation. The results showed that the addition of electric fields decreased the ion concentration in the vicinity of membrane surface. Also, the effect was great in the case of high intensity of the applied field. This implies that the applying electric fields is effective to decrease concentration polarization.

feedback
Top