Hideaki Kato

Active seat suspension for ultra-compact vehicle (Fundamental consideration on electromyogram when fall from the bump)

In these days automobile industry, the request for ultra-compact electric vehicles has been increasing in Japan. Unlike conventional automobiles, such ultra-compact electric vehicles may frequently travel on roads of poor condition, such as narrow and unpaved roads. These roads have bumps and many small obstacles, and therefore, the ride comfort of the vehicles is expected to deteriorate. Therefore, it is concerned regarding lack of visibility and the head protection functions. We suggest active seat suspension to improve the ride comfort by the disorder road run as a high value-added product. The active seat suspension carried voice coil motor (VCM) which is a kind of a linear motor as actuator. The objective of this study is to inspect utility and the effectiveness of the active seat suspension. In this paper, we focused on the neck electricmyogram and seat acceleration when fall from the bump.

Non-contact guide system for travelling elastic steel plate (Optimal placement of electromagnets by analysis of steel plate shape)

AbstractIn a factory, continuous thin steel plates are supported by a series of rollers during such processes as plating and rolling. Because the rollers come in contact with the steel plates, the problem of surface quality deterioration arises. To solve this problem, we developed a non-contact guide system for parts of the steel plate where the travelling direction changes by applying an electromagnetic force and experimentally examined the effectiveness of the system. In this study, the shape of the travelling steel plate is calculated by numerical analysis. Based on the results, we confirmed the validity of the proposed system.

Vehicle interior noise control of ultra-compact electric vehicle (Fundamental consideration using rectangular enclosure)

The demand for noise reduction inside a vehicle has been recently increasing in the pursuit of improved ride comfort. In consideration of requirement of quietness improvement and reduction of weight, an active noise control (ANC) system has been attracting much attention. This method is effective for noise with low frequency. In this study, we propose an ANC system by using the vibration of giant magnetostrictive actuator and we aim to reduce the noise level in an interior of a vehicle using this proposed ANC system. The giant magnetostrictive actuator has a high output that is sufficiently controllable inside a vehicle space and at the same time has high space efficiency. In this paper, the giant magnetostrictive actuator is installed at windshield of the enclosure that act as a vehicle, and the noise reduction effect to ANC were examined as the noise applied to the box from outside.