This paper introduces an induction machine with an implemented voltage unbalance compensator. Generally, voltage unbalances in the power grid line have been a serious problem for industrial motors due to over currents, torque ripple and local heating causes damage insulating material of stator windings. The induction machine with the implemented voltage unbalance compensator is consists of an open-winding induction machine and the voltage unbalance compensator (VUC) which is utilized PWM inverter and PWM converter. The stator windings of the induction machine are connected to the power grid line, the other side is connected to the VUC. The VUC provides the compensation voltages to the induction machine during the period unbalance voltage occurred. The torque ripple was compared with and without the VUC using a simulation. As a result, it was clarified the effectiveness for torque ripple reduction of the induction machine with the VUC.

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This paper presents a novel feedforward vibration control technique for a point-to-point (PTP) motion task of a flexible manipulator by utilizing macro fiber composite (MFC) which is one of piezoelectric devices. We use a MFC attached to one side of the flexible manipulator that has one revolute joint as an actuator. For the PTP motion task, the trajectory profile of the rotational motion is set to a cycloidal motion. The input voltage profile of the MFC is designed to suppress the residual vibration. In this method, we attempt to express the input voltage profile using Gaussian functions. The input voltage profile is dependent upon the coefficients of the Gaussian functions. To achieve the suppression of the residual vibration, the coefficients are tuned by a particle swarm optimization. We perform experiments to verify the validity of the vibration control method based on simulations. Results obtained from simulations and experiments demonstrate the effectiveness of the proposed method for suppressing the residual vibration. One feature of the present method is that the residual vibration of the flexible manipulator system with a PTP motion can be cancelled by designing the input voltage profile of the MFC.

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We propose a method that could be able to verify metallic-colored artifacts' authenticity. This method consists of two techniques. One is for forming a coating film and it uses flaky metal powder and functional material (it transmits visible light while absorbing near-infrared light). Another one is for photo shooting of color and near-infrared light images for authenticity verification by using image matching. Two types of images are shot by low-magnification microscopes. Authors calculated each type of image's similarity by using a Phase-Only Correlation method and found that the similarity of color images was lower than near-infrared light images. The degree of the artifacts' authenticity could be verified multi-modally by using two FAR/FRR curves depicted from two types of images.

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Surface chemistry experimental end-station constructed at BL23SU at SPring-8 is widely used to study various surfaces and interfaces of functional materials by means of high-brilliance soft X-rays generated by synchrotron radiation. In order to analyze the surface chemical reactions between gas and solid surfaces in detail, an accurate control of flow rates of reaction gases is essential. In this paper, a computerized automatic gas flow control system to improve the accuracy and reproducibility of gas-surface reaction experiments in the pressure range of ultra-high vacuum (molecular flow) conditions is reported. The system uses feedback control to operate the slow-leak valve to control the pressure in the experimental apparatus. As a result, the system achieved results equivalent to those of a skilled experimenter. The system also enables the control of the pressure in the apparatus in a short period of time.

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In recent years, the semiconductor manufacturing industry has seen a diversification of demand and the importance of high mix low volume production has increased. In the manufacture of semiconductors using process etching equipment, a device called a linear cluster tool is used, in which process modules that process one by one wafer are linearly connected by multiple links. In a production system such as a linear cluster tool, it is required to avoid phenomena such as deadlocks and collisions caused by resource constraints such as machines, parallel operations, and so on. However, it is difficult for control methods that assume mass production of a small variety of products to cope with high mix low volume production in which the process is frequently changed. In particular, the software that controls the equipment has become increasingly complex and large in scale to address this challenge, and this has also caused a problem of reduced maintainability. The purpose of this study is to propose an efficient control method design by integrating Petri net model and object oriented design method to solve these problems and to propose a method to develop highly reliable equipment control software.

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In recent years, metaverse technology has been attracting attention, and the virtual reality devices are expected to be applied to industrial applications. We have been working on the application of Mixed Reality technology to industrial robots. These applications are highly dependent on the MR devices used and the development tools. In this paper, we report on the basic applications to industrial robots using MR devices such as tablets and head-mounted displays (HoloLens2).

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Personal identifications are required to satisfy confidentiality, integrity, and availability. A password identification that one of the personal identifications is a memory-based personal identification which has not needed exclusive terminals, such as biometrics. However, password identification has 2 risks: (1) if an identification screen and keyboard input are peeped by someone, the password is leaked easier, (2) the long and random password that has strength of security is difficult to remember. This paper proposes that “PISFOC (Personal Identification System that Finding One person in Crowds),” a new memory-based personal identification system based on these problems. PISFOC is designed to have resistance to attacks that look into the identification screen and keyboard input. In addition, PISFOC’s user information that the user remembers and uses at the personal identification is easier than randomized 8 characters to remember. As a result of experiment measuring a resistance of visual hacking, attackers need 20 minutes at least to identify the user information. Furthermore, PISFOC’s user information is easier to memorize than randomized 8 characters.

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In this study, the purpose is to design a minimum layout about a device to detect obstacles in front and lateral areas of an automated guided vehicle (AGV) at the same time using a two-dimensional laser range scanner and mirrors. The results were as follows. Mechanism of the minimum layout design was shown to detect the obstacle in lateral area. On the basis of the mechanism, concrete design method was shown about, a layout and the width of the mirror in lateral scanning, the minimum layout area, scanning areas and reflecting points in front and lateral. By use of the design method, design results were shown about a number of different-sized scanner, AGV and mirrors. By use of actual scanner and mirrors, performance of the minimum layout design was evaluated to lay out actual obstacles and size of the AGV.

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We focus on Nagasaki City, which is one of the tourist cities in the region, analyze the data on tourism in Nagasaki City, and contribute the results of the analysis to the development of tourism in Nagasaki City. Specifically, we conduct a questionnaire survey on the places visited by travelers from Kanto, Kansai and Kyushu regions to Nagasaki City and their satisfaction levels, and analyze the relationship between the visited places and the satisfaction levels using two-sample t-test. Through the above analysis, we clarify the relationship between the presence or absence of the visited places and the satisfaction levels of travelers.

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A non-photorealistic rendering method (NPR) has been proposed for automatically generating moire-like images from photographic images using a bilateral filter and unsharp mask. Extensions to the conventional method have also been proposed for generating moire-like videos from videos or for generating moire-like images from RGB-D images. In this paper, we propose an NPR method for generating moire-like videos from RGB-D videos. Flickering is a common problem in NPR videos, but our method can suppress it. We evaluate the flicker of moire-like videos generated by our method visually and quantitatively through experiments using an RGB-D video captured by us.

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