Internal model control of a fast steering mirror for electro-optical fine tracking
Internal model control of a fast steering mirror for electro-optical fine tracking
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DOI：
10.1117/12.868901
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发表时间：
2010-11
期刊：
影响因子：
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通讯作者：
Yun-xia Xia;Q. Bao;Qiongyan Wu
中科院分区：
文献类型：
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作者：
Yun-xia Xia;Q. Bao;Qiongyan Wu
本研究的目的是开发先进的控制方法，以提高使用快速转向镜（FSM）的光电精细跟踪系统的带宽和跟踪精度。FSM是该控制系统中最重要的部分。本文首先建立了FSM的模型。与地面平台的光电精细跟踪系统相比，基于运动平台的光电精细跟踪系统必须具有较宽的带宽和鲁棒性。针对光电精细跟踪系统，提出了一种基于内模控制律的先进控制方法。IMC是一种高级算法。理论上，即使存在模型误差，也能完全消除干扰，保证输出与输入相等。并将过程分离到系统动态特性和目标摄动。与PID控制器相比，该控制器结构简单，参数调节方便，系统鲁棒性强。此外，我们还在经典IMC的基础上设计了一种改进的结构。双端口控制系统的跟踪误差明显优于传统的内模控制系统。仿真结果表明，基于内模控制算法的光电控制系统是非常有效的。它在跟踪精度和干扰抑制方面都有较好的性能。从而为高性能光电精细跟踪系统提供了一种新的方法。
The objective of this research is to develop advanced control methods to improve the bandwidth and tracking precision of the electro-optical fine tracking system using a fast steering mirror (FSM). FSM is the most important part in this control system. The model of FSM is established at the beginning of this paper. Compared with the electro-optical fine tracking system with ground based platform, the electro-optical fine tracking system with movement based platform must be a wide bandwidth and a robustness system. An advanced control method based on internal model control law is developed for electro-optical fine tracking system. The IMC is an advanced algorithm. Theoretically, it can eliminate disturbance completely and make sure output equals to input even there is model error. Moreover, it separates process to the system dynamic characteristic and the object perturbation. Compared with the PID controller, the controller is simpler and the parameter regulation is more convenient and the system is more robust. In addition, we design an improved structure based on classic IMC. The tracking error of the two-port control system is much better than which of the classic IMC. The simulation results indicate that the electro-optical control system based on the internal model control algorithm is very effective. It shows a better performance at the tracing precision and the disturbance suppresses. Thus a new method is provided for the high-performance electro-optical fine tracking system.