Title :
New fuzzy reasoning-based high-performance speed/position servo control schemes incorporating ultrasonic motor
Author :
Izuno, Yuji ; Takeda, Ryuzo ; Nakaoka, Mutsuo
Author_Institution :
Kubota Corp., Hyogo, Japan
Abstract :
A high-performance servo control scheme using compact ultrasonic motors (USMs) as actuators has not yet been practically realized in modern industry and office automation systems because the dynamic and steady-state modeling of USMs is almost impossible from a theoretical point of view. A high-performance speed/positional servo control scheme based on modern fuzzy reasoning concepts and featuring a traveling wave-type USM with high torque at low speed range is presented. The control method of the USM servo system using inverter frequency and voltage control strategies for the speed and amplitude of the traveling wave on the USM stator and the phase difference control scheme between two-phase high-frequency inverters are demonstrated and evaluated using experimental results. In particular, the control implementation is described from a practical viewpoint
Keywords :
digital control; electric actuators; fuzzy logic; invertors; machine control; piezoelectric motors; position control; servomotors; stators; velocity control; voltage control; HF; actuators; electric control equipment; frequency control; fuzzy reasoning; inverter; machine control; phase difference; position control; servomotors; speed control; stator; torque; travelling wave motors; ultrasonic motor; voltage control; Actuators; Control systems; Electrical equipment industry; Fuzzy reasoning; Industrial control; Inverters; Servomechanisms; Servomotors; Servosystems; Voltage control;
Journal_Title :
Industry Applications, IEEE Transactions on
