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光通信终端粗瞄控制系统设计对通信链路的建立有重要影响。本文对潜望式粗瞄伺服机构在外层空间受到的力矩扰动进行了分析,由于其变化规律复杂,将其作为低频有界扰动附加于无刷直流(BLDC)电机上,推导了有界无结构摄动情况下的终端控制对象模型;引入非脆弱状态反馈设计,确保在控制器参数漂移时闭环系统仍具有二次稳定性;利用线性矩阵不等式(LMI)方法,获得了二次稳定条件下的干扰抑制和防止执行器饱和的非脆弱控制器条件;最后对光通信终端的无刷直流电机模型进行分析,利用MATLAB完成粗瞄控制器的解算。仿真表明闭环系统在摄动下具有二次稳定性,对干扰有抑制力,其反馈控制量能满足预防饱和的设计要求。
Rough sight control system design of optical communication terminal has important influence on the establishment of communication link. In this paper, the moment disturbance of periscope rough aiming servo mechanism in outer space is analyzed. Due to its complex variation, it is added as a low-frequency bounded disturbance to a brushless direct current (BLDC) motor, and a bounded and unstructured The model of terminal control object under perturbation condition is introduced. The non-fragile state feedback design is introduced to ensure that the closed-loop system still possesses quadratic stability when the controller parameters drift. By using the linear matrix inequality (LMI) method, Interference suppression and non-fragile controller to prevent actuator saturation conditions. Finally, the brushless DC motor model of optical communication terminal is analyzed, and MATLAB is used to solve the coarse controller. The simulation shows that the closed-loop system has quadratic stability under perturbation and restrains the disturbance. The feedback control quantity can meet the design requirements of preventing saturation.