WTYD型压电陶瓷微位移器的迟滞特性建模与实验验证

为了模拟WTYD型压电陶瓷微位移器的输出位移与驱动电压之间的迟滞曲线,通过采用Bouc-Wen模型模拟迟滞分量,提出了一种表征WTYD型压电陶瓷微位移器的输出位移与驱动电压之间迟滞关系的Bouc-Wen模型并建立了相应的参数辨识方法。为了验证Bouc-Wen模型及其相应的参数辨识方法的有效性,建立了相应的实验装置并对模型进行了实验验证。研究结果表明,Bouc-Wen模型的最大绝对误差为3.78μm,最大相对误差为5.79%,表明Bouc-Wen模型及相应的参数辨识方法能较好地模拟WTYD型压电陶瓷微位移器的迟滞特性。

Hysteretic modeling and experimental verification for WTYD type piezoceramic micro-actuators

With the aim to model the hysteretic curve between the output displacement and applied voltage of the WTYD type piezoceramic micro-actuators, the Bouc-Wen model to characterize the hysteretic relationship between the output displacement and applied voltage of the piezoceramic micro-actuators is put forward by using the Bouc-Wen hysteretic operator to simulate the hysteretic component and then a corresponding parameter identification method is established. To evaluate the effectiveness of the developed model and the parameter identification method, the corresponding experimental setup is established and the model is validated. Research results indicate that the maximal absolute and relative errors of the proposed Bouc-Wen model are less than 3.78 μm and 5.79% respectively, which shows the proposed Bouc-Wen model and the parameter identification method can well simulate the hysteretic characteristics of the WTYD type piezoceramic micro-actuators.