压电致动器系统迟滞特性分析及影响

Analysis Hysteresis and Influence of Piezoelectric Ceramic Actuators

为了适应微动隔振平台自适应控制的要求,提高系统响应速度,对隔振平台系统的执行元件——压电致动系统进行了迟滞特性分析。为避免系统各部分间迟滞量混淆,将压电致动系统分为驱动电源和致动器两部分,首先根据Maison等效电路分析了驱动电压的迟滞量,然后综合考虑压电堆和机械结构的动态特性。在对压电致动器整体动态建模的基础上得出了系统输出位移-电压的迟滞量表达式,由表达式分析了影响迟滞的六个因素及影响。为高精度压电驱动系统的设计、控制系统的优化提供了依据。

With the purpose of adapting to the require of control micro vibration isolation plate and enhance the response velocity, the execution analyzed. element- piezoelectric actuator＇s hysteresis of vibration isolation plate system was The actuator system is divided into two part： supply rail equivalent circuit voltage and piezoelectric actuators, the Maison is used to solve electric hysteresis out first, and then a equivalent over the dynamic behavior dynamic model after thinking of piezoelectric actuators and the machine structural is built. Finally, the retarded expression of out displacement-voltage is got and six factors which effect the hysteresis are found out, which supply a gist for designing the piezoelectric actuators and optimizing control.