Hitachi, Ltd.

Hitachi Techno Engineering Co., Ltd.

Kitami Suzuki

Yukio Yamada

Hideaki Orikasa

Takeshi Miyanaga

Naoto Ebisawa

Keiichi Hiwatari

Yoshihiro Sakakibara

A control device of a compressor includes a valve control unit configured to control an anti-surge valve that returns fluid in a discharge side of the compressor to a suction side of the compressor in accordance with a control parameter, a simulation unit configured to simulate operational status of the compressor in a plant in accordance with a plant model and the control parameter of the plant to which the compressor is installed, and a control parameter adjusting unit configured to adjust the control parameter in accordance with a result of the simulation.

Control device and control method of compressor

A user-motion-response type exercise equipment capable of changing the moving speed of the moving belt surface so as to follow the running speed of the runner from the start to end of running. The equipment includes an endless belt mechanism having a moving surface for the user (runner) to walk or run on, a driving mechanism for driving the endless belt mechanism to move the moving belt surface at a speed in accordance with a control signal supplied externally, a position detector for detecting the user's position on the moving belt surface, and a controller for performing a control action combining a proportional control action and an integral control action in parallel in accordance with the user's position on the moving belt surface detected by the position detector as the controlled variable, and generating a control signal supplied externally to the driving mechanism and sending the control signal to the driving mechanism.

User-motion-response type exercise equipment

Growing community of inventors

Abiko, Japan

Kitami Suzuki