Shogo Odomari

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Since a conventional controller is continuous one, control period is normally set for a long time. When applying that controller for a travelling-wave ultrasonic motor whose parameters and performance are time-varying as a result of increasing temperature and operating condition, it is consequently resulted in degradation of the control performance. In this(More)
When applying a load torque to an ultrasonic motor, a dead-zone occurs in the control input. A nonlinear adaptive control, which considers dead-zones, is consequently proposed for the motor. To implement the proposed control strategy, a microcomputer and an embedded system are employed. The state quantities, such as acceleration, speed, and position, are(More)
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