导引头伺服系统的输出多采样率变结构控制
第35卷第5期 光电工程V ol.35, No.5 2008年5月Opto-Electronic Engineering May, 2008文章编号：1003-501X(2008)05-0033-06
导引头伺服系统的输出多采样率变结构控制
张文博1，朱华征1，范大鹏1，庞新良1，李凯2
( 1. 国防科学技术大学机电工程与自动化学院，长沙 410073；
2. 总参陆航部军代局, 北京 100083 )
摘要：针对弹体耦合干扰力矩、摩擦力矩及参数扰动对导引头伺服系统跟踪性能的影响，基于输出多采样和区域
极点配置技术，研究了导引头伺服系统的输出多采样率变结构控制，给出了确定控制器参数的方法。所设计的控
制器能保证闭环系统是有界稳定的，且无需利用系统的状态作为反馈而仅利用输出采样来设计控制器，因而无须
伺服机构中安装测速单元，有效节省了机构的体积和重量，有较强的实用性且易于实现。仿真结果表明，所设计
的控制器对弹体耦合干扰力矩及系统参数扰动有较强的鲁棒性，且具有较高的跟踪精度，因而在导引头伺服系统
这类对体积和质量有严格限制的伺服系统中具有较好的应用前景。
关键词：导引头；伺服系统；输出多采样率；变结构控制
中图分类号：TJ765, TH137 文献标志码：A
Digital Controller Redesign of Seeker Based on Sliding Mode Control
Algorithms with Multi-rate Output Feedback
ZHANG Wen-bo1，ZHU Hua-zheng1，FAN Da-peng1，PANG Xin-liang1，LI Kai2
( 1. College of Mechatronics Engineering and Automation, National University
of Defense Technology, Changsha 410073, China;
2. General Staff Army Aviation Ministry Military Representative Bureau Audit Office, Beijing 100083, China )
Abstract:Based on multirate output feedback control law and region pole assignment technology, a discrete sliding mode control algorithm is presented. The control law is adapted to seeker servo system, which is disturbed by friction, coupling and restriction moment. The method to determine the parameters of the controller is also given. The disturbance doesn’t need to satisfy the match condition and the boundary of the disturbance is known. Theoretical analyses show that the control strategy can guarantee the stability of the closed loop system. This methodology doesn’t need the system states for feedback as it makes use of only the output samples to design the controller. Thus, it is more practical and easier to be implemented. Simulation results show that by adapting the presented control law, the servo system of seeker can reach good performance in the presence of disturbance. The advantages, such as easy implementation and good dynamic performance, make the control law more promising on control system design of seeker.
Key words: seeker; servo system; multirate output feedback; variable structure control
1 引 言
导引头技术是精确制导武器的核心技术之一，用来完成对目标的自动搜索、识别与跟踪。导引头伺服系统是导引头的关键组成部分，其性能直接决定导引头系统的测量和跟踪精度。对导引头伺服系统这类存在非线性、强耦合的动态系统的高精度控制一直是工程界所关心的问题，为此，国内外学者展开了一系列
收稿日期：2007-08-01；收到修改稿日期：2008-03-22
基金项目：国防预研项目资助(10401020202a)
作者简介：张文博(1979-)，男(汉族)，湖北武汉人，博士生，主要研究光电跟踪伺服系统测控理论。E-mail: zhangwenbo188@https://www.360docs.net/doc/d313364002.html,
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