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Speed Sensorless Control of Linear Ultrasonic Motors Based on Stator Vibration Amplitude Compensation

机译:基于定子振动幅度补偿的线性超声波电动机无传感器控制

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摘要

In some applications of linear ultrasonic motors (LUSMs), not installing speed/position sensors can reduce the size and cost of the system, changes in load will cause fluctuations in the speed of the LUSM. To eliminate the influence of load changes on speed, a speed sensorless control scheme based on stator vibration amplitude compensation (SSCBVC) is proposed. This scheme is implemented under the framework of the stator vibration amplitude-based speed control (VBSC) and frequency tracking. Based on the stator vibration amplitude-speed and the output force-speed curves of the LUSM, the relationship between the load changes and stator vibration amplitude (SVA) to be compensated is established, realizing a speed sensorless control of the LUSM under variable load conditions. The experimental results show that the maximum fluctuation of the speed is about 2.2% when the output force changes from 0 to 6 N with SSCBVC. This scheme can effectively reduce the influence of load changes on the speed of the LUSM without using speed/position sensors.
机译:在线性超声波电机(LUSMS)的一些应用中,不安装速度/位置传感器可以降低系统的尺寸和成本,负载的变化将导致LUSM速度的波动。为了消除载荷变化对速度的影响,提出了一种基于定子振动幅度补偿(SSCBVC)的速度传感器控制方案。该方案在基于定子振动幅度的速度控制(VBSC)和频率跟踪的框架下实现。基于定子振动幅度和LUSM的输出力 - 速度曲线,建立了待补偿的负载变化和定子振动幅度(SVA)之间的关系,实现了可变负载条件下LUSM的速度传感器控制。实验结果表明,当输出力随SSCBVC的0到6 n时,速度的最大波动约为2.2%。该方案可以有效地降低负载变化对LUSM速度的影响而不使用速度/位置传感器。

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