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机载空间激光通信系统的视轴稳定是保持通信链路的前提,高品质的控制方法是实现视轴稳定的关键。针对激光通信终端易受到载体运动、参数变化和各种扰动的影响,基于非线性跟踪微分器、非线性状态误差反馈控制器和扩张状态观测器,设计了针对视轴稳定两轴伺服平台的自抗扰控制器,将模糊理论和自抗扰控制方法相结合,完成了自抗扰控制器的关键参数自适应整定。仿真实验结果表明,该方法既可以实现阶跃响应快速、无超调,与其它控制方法相比,对载体运动、不确定扰动和系统参数变化具有明显比较优势,改进的自抗扰方法提高了视轴稳定伺服系统的稳定性和适应性,具备良好的工程应用价值。
Boresight stabilization of airborne laser communication system is the precondition of keeping the communication link. The high quality control method is the key to realize the boresight stability. Aiming at the influence of laser communication terminal susceptible to carrier motion, parameter variation and various disturbances, a self-adaptive two-axis servo platform is designed based on nonlinear tracking differentiator, nonlinear state error feedback controller and extended state observer The anti-disturbance controller combines the fuzzy theory with the self-disturbance rejection control method to complete the adaptive tuning of the key parameters of the ADRC. Simulation results show that the proposed method can achieve fast step response and no overshoot. Compared with other control methods, this method has obvious advantages over carrier motion, uncertain disturbance and system parameter changes. The improved self-interference rejection method improves The stability and adaptability of the servo system of boresight stability, have good engineering application value.