摘要
针对外部扰动对光电跟踪伺服系统精度的影响,对稳定回路提出了一种两自由度内模控制,将控制器的设计转化为标准的H∞优化问题,使得系统对模型误差及参数摄动具有较强的鲁棒性。采用jump变换、提升操作等采样控制系统的理论与方法来优化设计相应的鲁棒控制器,综合考虑了系统的多采样率行为及采样点间的动态特性。仿真结果表明,相比于传统的鲁棒控制器设计方法,所设计的多采样率控制器的鲁棒性能指标为1.4135,能够更真实地反映光电跟踪伺服系统的多采样率特性对系统鲁棒性能的影响,且具有较高的指令跟踪精度及较强的扰动抑制性能。本文的研究为高精度光电跟踪伺服控制系统的设计提供了新方法。
A kind of Two-Degree-of-Freedom（TDF） Internal Model Controller（IMC） for electro-optical tracking servo system is presented. By converting the design of the controller to a H∞ optimization problem, the system can obtain good robust performance. With considering the dynamic behavior between sampling time and multi-rate signals in system, the sampled-data control techniques such as jump transform, lifting and so on are used to the synthesis of robust controller. The simulation results show that, compared with traditional robust controller,the designed multi-rate controller can achieve robust performance to 1. 413 5, which can authentically reflect the multi-rate characteristic of the control system for electro-optical tracking. The simulation results also show that the designed internal model controller not only can guarantee a good disturbance attenuation as well as the tracking performance, but also can finally satisfy speed control requirement for high-performance linear servo systems. By this way, this paper gives a new method to design the controller for electro-optical tracking servo system.
出处
《光学精密工程》
EI
CAS
CSCD
北大核心
2008年第2期221-228,共8页
Optics and Precision Engineering
基金
国防科技预研基金资助项目(No.10401020202a)
关键词
光电跟踪
伺服系统
内模控制
鲁棒控制
采样控制
electro-optical tracking
servo system
internal model control
robust control
sampling control
