Current control of piezoelectric actuators with power loss compensation
Current control of piezoelectric actuators with power loss compensation
复制标题
具有功率损耗补偿的压电执行器的电流控制
DOI：
10.1109/irds.2002.1044041
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发表时间：
2002
期刊：
影响因子：
--
通讯作者：
H. Koivo
中科院分区：
文献类型：
--
作者：
P. Ronkanen;P. Kallio;H. Koivo
本文介绍了一种前馈电荷控制方法，该方法通过给驱动器提供的电流量来控制位移。该方法包括估计和补偿在致动器中发生的功率损失。功率损耗估计与实验创建的动态模型，不包括负载和自热效应。尽管该方法基于前馈控制，但使用精确的电流测量和PID控制器在闭环中控制电流量。压电弯曲机的实验显示了良好的效果;与开环电压控制相比，滞后几乎减少到二十分之一，漂移减少到十分之一。所提出的方法可以相当准确地预测功率损耗，因此不仅可以用于控制，而且可以用于功率估计的应用中，功耗是至关重要的。
This paper introduces a feedforward charge control method, which controls the displacement by the amount of current fed to the actuator. The method includes estimation and compensation of the power losses occurring in the actuator. Power losses are estimated with an experimentally created dynamic model, that does not include the load and self heating effects. Even though the method is based on feedforward control, the amount of current is controlled in closed loop, using a precise current measurement and a PID controller. Experiments with a piezo bender show promising results; the hysteresis was nearly reduced to one part in twenty and drift to one part in ten, in comparison to open-loop voltage control. The proposed method can predict the power losses quite accurately and can therefore be utilized not only for the control but also for power estimation in applications where power consumption is critical.