基于迭代学习-未知输入观测器的卫星姿控系统鲁棒故障重构

doi:10.3969/j.issn.1001-506X.2012.01.23

Journal of Systems Engineering and Electronics ›› 2012, Vol. 34 ›› Issue (1): 120-124.doi: 10.3969/j.issn.1001-506X.2012.01.23

基于迭代学习-未知输入观测器的卫星姿控系统鲁棒故障重构

贾庆贤¹, 张迎春^1,2, 沈毅³, 吴丽娜¹

1. 哈尔滨工业大学卫星技术研究所, 黑龙江哈尔滨 150001；
2. 深圳航天东方红海特卫星有限公司, 广东深圳 518057；
3. 哈尔滨工业大学航天学院, 黑龙江哈尔滨 150001

出版日期:2012-01-13 发布日期:2010-01-03

Robust fault reconstruction method for satellite attitude control system based on iterative learningunknown input observer

JIA Qingxian¹, ZHANG Yingchun^1,2, SHEN Yi³, WU Lina^1

1. Research Center of Satellite Technology, Harbin Institute of Technology, Harbin 150001, China；
2. Aerospace Dongfanghong Development Ltd., Shenzhen 518057, China；
3. School of Astronautics, Harbin Institute of Technology, Harbin 150001, China

Online:2012-01-13 Published:2010-01-03

摘要/Abstract

摘要：

针对卫星姿控系统出现执行机构故障，提出一种基于迭代学习-未知输入观测器(iterative learningunknown input observer, IL-UIO)的鲁棒故障重构方法。首先,考虑卫星出现空间干扰力矩、模型不确定性以及陀螺漂移，建立小角度机动时的非线性姿控系统模型。其次,采用UIO干扰解耦原理和H_∞控制思想，设计IL-UIO估计卫星姿态欧拉角和角速度的同时，利用IL算法实现执行机构鲁棒故障重构。并利用Lyapunov稳定性理论证明了IL-UIO稳定性和动态故障偏差最终有界, 通过线性矩阵不等式(linear matrix inequaliry, LMI)工具箱求解了观测器部分参数矩阵。最后，建立卫星闭环姿控系统并进行仿真，仿真结果验证了此方法的有效性。

Abstract:

A robust fault reconstruction method based on the iterative learning unknown input observer (IL-UIO) is proposed for actuator fault in satellite attitude control systems （ACS）. Firstly, considering space disturbance torque, model uncertainties and gyro drift, the nonlinear model of attitude control is established when a threeaxis stability satellite runs in a small angle maneuver. Secondly, based on the disturbance decoupling principle of UIO and H_∞ control theory, the IL-UIO is designed to estimate attitude Euler angles and angular velocities, and the IL algorithm is used to achieve actuator robust fault reconstruction. Using the Lyapunov stability theorem, the stability of IL-UIO and the ultimate boundedness of dynamic fault errors are proved, the parameter matrixes of ILUIO are solved effectively in terms of linear matrix inequality (LMI) toolbox. Finally, mathematical simulation is performed to validate the solution in satellite closedloop ACS, and simulation results demonstrate the effectiveness of the proposed algorithm.

贾庆贤, 张迎春, 沈毅, 吴丽娜. 基于迭代学习-未知输入观测器的卫星姿控系统鲁棒故障重构[J]. Journal of Systems Engineering and Electronics, 2012, 34(1): 120-124.

JIA Qingxian, ZHANG Yingchun, SHEN Yi, WU Lina. Robust fault reconstruction method for satellite attitude control system based on iterative learningunknown input observer[J]. Journal of Systems Engineering and Electronics, 2012, 34(1): 120-124.

基于迭代学习-未知输入观测器的卫星姿控系统鲁棒故障重构

Robust fault reconstruction method for satellite attitude control system based on iterative learningunknown input observer

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