密集模态挠性结构振动的自适应逆控制

Vibration control of flexible structures with close modes using adaptive inverse control method

一般空间大型挠性结构具有模态密集和参数随特殊空间环境变化的特点,给振动控制系统的设计带来严峻的挑战。常规的固定参数控制器,能很好地解决密集模态挠性结构在相当长的一段时间内不发生变化且其模型可以较为准确获取的一类问题,但结构参数变化时控制效果变差甚至系统失稳。为此研究了密集模态挠性结构振动的自适应逆控制,在二维密集模态挠性板振动控制实验系统上,实现了扰动的有效抑制,其控制效果比固定参数控制器要好;当系统结构参数发生变化时,自适应逆控制系统能够自动重新进行在线辨识和控制器参数自适应调整,达到新状态下扰动的有效抑制。

The vibration control of space flexible structures is difficult as they are with close models and their structural parameters can be easily affected by complex space environments.It is valuable to study the adaptive inverse control.Here,multi-variable adaptive inverse control was successfully applied to a 2-D flexible plate test system with close modes,and good experiment results were obtained.Persistent disturbances were suppressed effectively.When the structural parameters changed,the procedures of online identification and controller parameter adaptive adjustment restarted and effective vibration suppression was realized again.