基于规则的仿人智能控制在微驱动系统中的应用

An application of an biotic intelligence control based on the rule in the piezoelectric micro - drive system

根据三角形放大原理设计出一种以压电陶瓷为驱动元件、应变片为微位移传感元件的精密微位移机构，由于压电陶瓷存在迟滞、蠕变和非线性的不足，并且难于得到其准确的数学模型，采用常现线性PID控制方法很难实现微驱动机构的高速高精度控制，针对这一问题，将基于数字PI控制的仿人智能控制方法应用于微驱动系统的控制中，它是在数字PID控制算法的基础上通过仿人智能控制的特征变量en·Δen的取值符号选择相应的控制策略，实验结果表明采用该方法可以大大地提高系统的静态和动态性能．

Based on the principle of triangular magnification, a precise micro-displacement mechanism driven by piezoelectric actuator is designed. Gauge is chosen as the micro - displacement sensor. Because of piezoelectric actuator's lap and creep and non - linearity, building accurate mathetnahcal model is difficult. Therefore, it is very difficult to realize high - speed, high-precision control by the usual control method of linear PID. In order to solve the problem a biohc intelligence control method based on the digital PI is applied to the conbol of micro - driving system. It can choose the appropriate method according to the sign of the characteristic variable en.·Δen. The experimental result shows that this method greaily improves tLhe static and dynamic characteristic of tLhe piezoelectric micro - driving system.