光电平台伺服系统稳定环结构谐振自抗扰控制

摘要

The structure resonance perhaps causes the unstable system, which limits the tracking precision and the dynamic response speed of an airborne opto-electronic platform servo system. According to the zero-pole assignment principle, an active disturbance rejection controller is designed with a nominal control input. The active disturbance rejection controller is used to compensate the stable loop structure resonance of the opto-electronic platform servo system. Simulation experiment results demonstrate that the controller could inhibit the structure resonance influence on the servo system and increase the stable loop velocity tracking precision of the opto-electronic platform. Moreover, it is robust to the parameters’ changes of the structure resonance model.%　　结构谐振可能造成系统不稳定，限制机载光电平台伺服系统的跟踪精度和动态响应速度。根据零极点配置原理，采用名义控制量进行自抗扰控制器的设计，利用该自抗扰控制器补偿光电平台伺服系统稳定环的结构谐振。仿真实验结果表明它较好地抑制了结构谐振对伺服系统的影响，提高了光电平台稳定环的速度跟踪精度，并且对结构谐振传递函数中参数较大范围的变化具有鲁棒性。