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对自适应光学系统中的控制算法设计进行了整体研究。首先对自适应光学系统各模块的物理特性进行了分析,并在此基础上建立了系统整体的数学模型。针对传统处理含有纯滞后环节系统近似方法的不足,文章采用直接求解系统传递函数幅频和相频解析函数的方法来对系统特性进行分析,通过比较系统的开环特性、闭环特性、误差和噪声传递特性等对三种控制方法(积分控制、PI控制和Smith控制)的控制品质进行了分析。分析和仿真结果表明,Smith控制方法对自适应光学系统能够达到较好的控制效果,为实际系统的设计提供了理论指导。
The whole design of control algorithm in adaptive optics system is studied. First of all, the physical characteristics of each module of the adaptive optics system are analyzed, and on the basis of that, a mathematical model of the whole system is established. Aiming at the shortcomings of the conventional methods of dealing with the system with pure hysteresis, the paper analyzes the characteristics of the system by solving the system frequency and phase frequency analytic functions directly. By comparing the open-loop characteristics, closed-loop characteristics, error and noise Transmission characteristics of the three control methods (integral control, PI control and Smith control) quality of control were analyzed. The analysis and simulation results show that the Smith control method can achieve better control effect for the adaptive optics system and provide theoretical guidance for the design of the actual system.