自适应光学中的控制算法设计与仿真

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。

Control Algorithm Design and Simulation for Adaptive Optics System

The control algorithms for adaptive optics system are studied. Based on the analysis of the physical characteristics of each module of the adaptive optics system, the global mathematic model is established first. Aimed at the deficiency of the traditional approximate method for analyzing systems with pure delay, the paper gives a direct method to calculate the magnitude and phase analytical function to analyze the system. Three control algorithms such as the classical integrator controller, proportional-integrator controller and Smith controller are compared in respect of several aspects including open-loop character, closed-loop character, error suppressing bandwidth, and high-frequency noise suppression character etc. It is demonstrated that the smith controller displays the better control effects for adaptive optics systems.