多采样率控制器设计在光电跟踪系统中的应用  

Design of a multi-rate controller and its application in electro-optical tracking system

作　　者：庞新良[1] 范大鹏[2] 李凯[3] 张连超[2] 郝锋[3] 

机构地区：[1]国防科技大学.机电工程与自动化学院,长沙410073 [2]国防科技大学机电工程与自动化学院,长沙410073 [3]国防科技大学研究生院,长沙410073

出　　处：《电光与控制》2007年第5期43-48,共6页Electronics Optics & Control

基　　金："十一五"国防预研项目资助

摘　　要：采用保持器、采样器和提升技术对输入、反馈和输出多采样率多环路系统进行分析,并将多采样率的周期离散时变系统化为时不变系统,且在输入和反馈端依据信号特性引入高频低通滤波器进行信号频谱延拓周期的扩展。在三环结构光电跟踪控制系统中的应用表明:离散控制器有和连续控制器一致的阶跃响应,在引入高频低通滤波器扩展频域延拓周期后,由低频位置输入引入的系统速度震荡基本上完全被抑制。Through analyzing the input-feedback-output multi-rate system by use of holders, samplers and lifting, the periodical discrete time-variation system is transformed into time-independent system. At the same time, a high-frequency low-pass filter is imported at the ports of input and feedback to extend the frequency domain continuation period of the signal. The application of it in the three-frame electro-optical tracking system implies ： the step response of discrete controller is same as the continued ones, after importing the high-frequency low-pass filter for extending the period, the speed vibration induced by low - frequency input is ultimately controlled.

关 键 词：多采样率控制 高阶保持器(HOH) 光电跟踪系统 频域延拓周期扩展 提升技术 

分 类 号：V271.4[航空宇航科学与技术—飞行器设计] TP273[自动化与计算机技术—检测技术与自动化装置]