分析空间激光通信移动平台角运动和框架偏转之间的速度耦合关系,给出克服移动平台角运动的视轴稳定方法,针对视轴稳定系统中存在的非线性、多干扰问题,应用自抗扰控制法对三轴视轴稳定系统进行分散独立控制,采用模糊理论对自抗扰控制器的相关参量进行自整定.仿真和模拟实验表明:在1Hz条件下,相对于参量辨识控制法,模糊自抗扰控制法的抗扰动隔离度提高了7.4dB;在模拟扫频实验条件下,将1-2Hz与2-4Hz的扰动实验区间进行比较,模糊自抗扰控制法的抗扰动隔离度下降仅2.2dB.模糊自抗扰控制具有较好的快速响应性、较小的超调和频率适应性,能够满足系统稳态准确度的要求,并能克服平台角运动耦合、不确定性扰动问题.
The velocity coupling relationship between the moving platform and the frame deflection was analyzed,optical axis stabilization method was deduced,and aiming at the non-linearity, multiinterference in optical axis stabilization,active disturbance rejection controller based on fuzzy reasoning was proposed to control three axis stabilization systems.Through software simulation and experiment:under1Hz disturbance,with respect to parameter identification method,anti-disturbance isolation degree based on active disturbance rejection controller is increased by 7.4dB,in the experimental condition of the sweep frequency from 1-2 Hz to 2-4 Hz,the anti-disturbance isolation degree of the fuzzy auto disturbance rejection control method decrease only 2.2dB.Fuzzy auto disturbance rejection controller has better fast response,smaller super adjustment and frequency adaptability,also can overcome the platform angular motion and uncertainty disturbance.