Robust Control of Line-of-Sight Attitudes of a Two-Axis Gimbaled Seeker

Abstract

Abstract:

A robust design approach was proposed to address the line-of-sight (LOS) control problem for a gimbaled seeker with yaw-pitch configuration. Differential equations on LOS dynamics were deduced via the moment balance of each gimbal. The different modes in which the major disturbances, including disturbance torque, system nonlinearity and platform angular motion, influence the system dynamics were analyzed. Based on the unstructured uncertainty descriptions of the system, a H∞ controller was synthesized to realize servo control on the LOS attitudes. Simulation results demonstrate that the proposed approach supplies strong robustness against system uncertainties, disturbance torques and nonlinearities.

Key words：

Key words: seeker, line-of-sight (LOS), gimbal dynamics, system uncertainty, robust stability

CLC Number:

TJ 765.3

WANG Xianfang1,MIAO Jun2,ZHAN Shitao2,3,QIAO Zhiyuan2,4,WANG Suihua1. Robust Control of Line-of-Sight Attitudes of a Two-Axis Gimbaled Seeker[J]. Journal of Shanghai Jiaotong University, 2014, 48(05): 735-740.

References

［1］Rue A K. Precision stabilization systems ［J］. IEEE Transactions on Aerospace and Electronics Systems, 1974, 10(1): 3443.

［2］Kennedy P J, Kennedy R L. Direct versus indirect line of sight (LOS) stabilization ［J］. IEEE Transactions on Control Systems Technology, 2003, 11(1): 315.

［3］Yu S, Zhao Y Z. A new measurement method for unbalanced moments in a twoaxis gimbaled seeks ［J］. Chinese Journal of Aeronautics, 2010, 23(1): 117122.

［4］于爽，付庄，闫维新，等. 弹载消旋平台双模控制与仿真研究［J］. 系统仿真学报, 2008, 20(3): 689691.

YU Shuang, FU Zhuang, YAN Weixin, et al. Study on double model control and simulation for missileborne eliminating rotation platform ［J］. Journal of System Simulation, 2008, 20(3): 689691.

［5］Yu S, Zhao Y Z. Simulation study on friction compensation method for inertial platform based on disturbance observer ［J］. Journal of Aerospace Engineering, 2008, 222(3): 341346.

［6］于爽，付庄，赵辉，等. 惯性平台不平衡力矩测试方法及补偿控制［J］. 上海交通大学学报, 2008, 42(10): 16921696.

YU Shuang, FU Zhuang, ZHAO Hui, et al. Measurement method and compensation control for unbalanced moment of inertial platform ［J］. Journal of Harbin Institute of Technology, 2008, 42(10): 16921696.

［7］Waldmann J. Lineofsight rate estimation and linearizing control of an imaging seeker in a tactical missile guided by proportional navigation ［J］. IEEE Transactions Control Systems Technology, 2002, 10(4): 556567.

［8］Lee H P. Scan loop control design for a spinstabilized seeker ［J］. IEE ProceedingsControl Theory and Applications, 1998, 145(2): 119126.

［9］于爽，付庄，赵辉，等. 基于干扰观测器的惯性平台摩擦补偿方法［J］. 哈尔滨工业大学学报, 2008, 40(11): 18301833.

YU Shuang, FU Zhuang, ZHAO Hui, et al. Method of friction compensation base on disturbance observer in inertial platform ［J］. Journal of Harbin Institute of Technology, 2008, 40(11): 18301833.

［10］Kim S B, Kim S H, Kwak Y K. Robust control for a twoaxis gimbaled sensor system with multivariable feedback systems ［J］. IET Control Theory Appl, 2010, 4(4): 539551.

［11］Lee H P, Yoo I E. Robust control design for a twoaxis gimbaled stabilization system ［C］∥IEEE Proc Aerospace Conference Aeros. Big Sky, USA: IEEE, 2008: 32653271.

［12］Ho D W C, Lam J, Chan T W K. Mixed H∞ optimisation with modelmatching ［J］. IEE ProceedingsControl Theory and Applications, 1994, 141(5): 329340.

［13］Gahinet P, Apkarian P. A linear matrix inequality approach to H∞ control ［J］. International Journal of Robust and Nonlinear Control, 1994, 4(4): 421448.

［14］Iwasaki T, Skelton R E. All controllers for the general H∞control problem: LMI existence conditions and state space formulas ［J］. Automatica, 1994, 30(8): 13071317.

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