为了提高电动舵机系统的动态响应性能,文中提出了一种自适应变阻尼控制方法。首先,在分析舵机传递函数的基础上对其进行了简化;其次,分析了无阻尼自然频率和阻尼比对系统动态性能的影响;再次,结合常规PID控制结构简单、易于实现和遗传算法自适应能力强的优点,设计了基于自适应变阻尼控制算法的新型变阻尼控制器;最后,通过仿真结果对比,表明自适应变阻尼控制方法可以优化随动系统的动态响应性能,系统单位阶跃响应速度快,无超调。

Abstract:In order to improve the dynamic performance of the electric servo system, an variable damping ratio control method which is adaptive is proposed. Firstly, we analyze the transfer function and simplify it. Secondly, influence of undamped natural frequency and damping ratio on the system is analyzed. Thirdly, a new variable damping ratio controller is designed which is based on the adaptive algorithm. It has the advantages of PID control and genetic algorithm. Finally, the simulation results show that the new variable damping ratio controller can improve the dynamic performance significantly and has no overshoot with high speed response while using step signal as input signals.

TN820.3