作　　者： ; ; ; ;

机构地区： 广东海洋大学理学院

出　　处： 《电光与控制》 2008年第8期87-90,共4页

摘　　要： 基于离散指数趋近律和被控对象离散化模型设计了空间光通信的瞄准、捕获和跟踪系统(简称PAT系统)的变结构控制器,通过改变趋近律的参数,消除了系统的抖振现象,使得在滑模方式下系统收敛于平衡点,从而实现了系统远远高于经典频域法对动态目标的跟踪精度。仿真结果表明在跟瞄性能方面变结构控制跟踪动态目标的跟踪精度比经典控制提高了两个数量级,证实了该设计方法的可行性。 A variable structure controller is designed for Pointing,Acquisition and Tracking （PAT） system in space optical communication based on discrete exponent reaching law and discrete model for the controlled plant. By changing parameters related to the reaching law, the chattering phenomenon of system is eliminated so that the system converges to the equilibrium in sliding mode and much higher tracking accuracy is achieved in tracking dynamic target than that of conventional frequency domain method. Simulation results show that： compared with conventional frequency domain method for the pointing and tracking performance, two order of magnitude improvement is obtained in dynamic target tracking accuracy with variable structure controller. The feasibility of the design method is also proved.

关 键 词： 空间光通信 变结构控制 系统

领　　域： [航空宇航科学与技术] [航空宇航科学技术] [自动化与计算机技术] [自动化与计算机技术]