具有迟滞和蠕变特性压电作动器的模糊自适应逆控制方法

Adaptive Fuzzy Inverse Control of Piezoelectric Actuator with Hysteresis and Creep

针对具有迟滞和蠕变特性的压电作动器非线性模型,提出了一种前馈控制和反馈控制相结合的自适应模糊逆控制方案。在前馈控制器中压电作动器的迟滞和蠕变非线性特性的逆模型由自适应模糊逻辑系统近似;在反馈控制器中比例控制器用来调节压电作动器的输出误差。该方法可以实时补偿压电作动器的迟滞和蠕变特性,减少作动器跟踪误差。仿真计算结果表明了该方法的有效性。

In this paper, a control method combining to compensate the hysteretic and creep characteristics the feedforward and feedback controllers is proposed of piezoelectric actuators by an adaptive fuzzy inverse control. In the feedforward controller design, fuzzy logic system architecture is treated as the inverse function of piezoelectric actuators＇ nonlinear model. In the feedback controller design, a proportional controller is used to regulate the output error of piezoelectric actuators. Simulation results show that the proposed compensation method is an efficient way of improving the tracking performance of piezoelectric actuators.