[in Japanese]

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The adaptive cruise control system consists of a headway distance control system and a velocity control system. The headway distance control system imposes the requirement on the velocity control system. The velocity control system must provide the desired response at all time, so that a robust model-matching method was used. The headway distance control system must have stability to follow a preceding vehicle and desired transient characteristics. Therefore, in this paper, a two-degree-of-freedom model following control method has been incorporated in the headway distance control used for adaptive cruise control system. As a results, this control system meets the performance target expected of a production vehicle. Some simulations and experimental results show the usefulness of the proposed approach.

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This paper describes the research plan and goals of the JAXA's next-generation air-safety management system (DREAMS), also referring to the current status of the development. It is commonly recognized that the future aviation system will be featured by "convenience and efficiency" as well as "safety and environmental suitability". The DREAMS realizes those through developing advanced avionics and operating rules.

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While going around corner, driver tilt their head to traveling direction is well known phenomenon. There are two hypotheses to exprein this phenomenon, but these explanations are qualitative and can not arrive at understanding of transient phenomena. To understand driver's head control strategy quantatively contribute to design of maneuverable car, driver education for sefety driving and reduction of Car-Sickness. We suggest to adopt reinforcement learning for understanding driver's head control strategy.

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Liquified petrolum gas (LPG), natural gas, methanol, ethanol, bio-diesel oil, GTL, DME, and so on, are now under developing or prevailing stages as new fuels for vihcles in order to reduce emisson of earth warming gas of CO_2 and air polluting gases of SO_x and NO_x, and to increase variety of energy resources. To array filling stations supplying with various fuels, a new system are proposed in which fuels are fed by means of exchange of a empty fuel tank with one filled at the loading factory for each fuel. After a tank for each fuel is standardized, various fuels can be supplied at a filling station.

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In this research, a method of designing an EPS control that achieved an excellent steer feeling without using an actual vehicle was examined. Firstly, evaluation functions to evaluate steer feeling theoretically were set. And it was described that the steer feelings such as "Inertia feeling" and "Viscous feeling" could be expressed by the evaluation functions. Secondly, a target characteristic that made the steer feeling excellent was determined on the evaluation function, and control methods to theoretically achieve this target characteristic was described. Finally, the designed control had been installed in an EPS vehicle. As a result, it was confirmed that the steer feeling in an actual vehicle was excellent with no "Inertia and viscous feeling".

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This paper describes the estimation algorithm of the fault detection of railway vehicles. This algorithm is formulated based on the Interacting Multiple-model (IMM) algorithm. IMM algorithm which choose probable model from number of models is applied to the fault detection. In IMM method, changes of the systems structure and the systems parameters are called mode. We provide several suspension failure modes and sensor failure modes for the fault detection. The mode probabilities and states of vehicle suspension are estimated based on Kalman Filter (KF). This algorithm is evaluated in simulation examples. Simulation results show that the algorithm is effective for on-board fault detection of the railway vehicle suspension.

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This paper is concerned with a newly developed monitoring technique of particle flow-rate in gas-solids pipe flow based on the static electrification of particles. The method is found to be feasible to detect the flow-rate as small as 0.5g/s for large alumina particles of 0.3mm in mass median diameter. Here we investigated the effect of vibration on the detection sensitivity of the sensor to obtain fundamental data for practical applications of the sensor in various particulate processes such as sand blasting. In order to obtain one of the fundamental data to apply the sensor, it was found that the detection sensitivity was increased by the vibration and the sensor could be applied even in a condition such as the vibration was as large as 30G. It was also found that material or length of transport pipe had serious effect on the sensitivity of particle flow-rate.

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The authors propose methods for aero-acoustic source localization to improve the spatial resolution and accuracy of identification in a wind tunnel test. In order to prevent the influence of free shear layer, which causes an error, a microphone array is installed adjacent to the main flow. It is apparent that the accuracy improved at a wind velocity of 300km/h. We verified the applicability of this method by an aero-acoustic source localization test for a body gap and a bogie of 1/8-scaled model in a wind tunnel test. As a result, clear source distributions around the model are obtainable. It has shown that aero-acoustic noise caused by the flow separation at the edge of body gap can be reduced by the outer bellows, and the noise generated around the wheels is shielded by the side cover at high frequency region.

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In addition to designs of input number of machines, system layout, and management model, we take into consideration machines' specifications for imposed demands. This is the proposed integrated design methodology for a transportation system in an automated seaport container terminal, in this paper. The objective of this research is to maximize the system efficiency while minimizing the changes of the specifications. For this objective, we evaluate the specifications ; then, make clear the effects on the system. Based on the results, we downgrade and upgrade the specifications and then, we finally design the number of machines and the specifications appropriately for imposed demands.

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"On-demand bus system" is an approach to improve mobility in a city. Time flexibility is one of the advantages of On-demand bus system. However, passengers feel inconvenient because the bus often arrives later than the expected time. This paper describes "A New On-demand bus system" which passengers can get time schedule of the bus during reservation, and bus always arrives on schedule. IT system based on original scheduling algorithm, database technology and mobile communication technology between driver and server play an important role in implementing system. The experiment had been carried out in Kashiwa city. The results show some values of "A New On-demand bus system".

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The National Institute for Land and Infrastructure Management (NILIM) has been promoting R & D for the Advanced Cruise-Assist Highway Systems (AHS) that utilize roadside sensors and a traffic, driving simulator. The combination of AHS video sensors with a customized traffic, driving simulator realizes microscopic analyses of traffic behaviors that found diverse AHS services for improvement in traffic conditions. This paper introduces ongoing projects including successful one at FOT stage and the role of AHS as future approach that copes with drivers' characteristics against traffic accidents and congestion.

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Recently, APM (Automated People Mover) and LRT (Light Rail Transit) have introduced in many cities over the world as new transportation system which can solve the problems of traffic jam, ambient noise and environmental pollution. For further requirement of lower construction costs and higher energy performance, onboard battery could take the place of conventional wire of power feeder along the truck. This paper outlines wireless test-run results by onboard battery installed under floor of the vehicle. Control method of battery charge for practical application is also discussed.

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Recently, Railway Systems are getting increased worldwide attention in order to reduce environmental pollution and traffic jam. Especially, the Light Rail Transit (LRT) is expected to become high-performance transit system as inner city transportation systems. In order to make floor above bogies as low as possible, the wheel axles are disappeared from the bogies. The bogie with independently wheels for low floor vehicles was developed. To verify running stability and safe running of the developed vehicle, measurement of vertical wheel load (P) and lateral wheel force (Q) were needed. However, we had no background in the measurement for the independent rotating wheels. Then, conventional methods and new methods for the PQ measurement were tried in vehicle running test. It is shown that the measurement of wheel load and lateral force for the independently rotating wheels. The measurement methods and the experimental results are also introduced.

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