| 基于RO-NUIO/LMI的挠性卫星轨控期间姿控系统故障诊断 |
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| 引用本文： | 侯倩,程月华,姜斌,陆宁云.基于RO-NUIO/LMI的挠性卫星轨控期间姿控系统故障诊断[J].宇航学报,2011(10). |
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| 作者姓名： | 侯倩 程月华 姜斌 陆宁云 |
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| 作者单位： | 南京航空航天大学自动化学院;南京航空航天大学高新技术研究院; |
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| 基金项目： | 国家自然科学基金(61034005); 江苏省自然科学基金(BK2010072) |
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| 摘 要： | 卫星轨控期间,由于推力偏心,会产生较大的干扰力矩,直接影响卫星姿态。针对轨道控制期间的挠性卫星姿态控制系统,设计了干扰解耦的降阶非线性未知输入观测器(RO-NUIO),用于故障检测与故障隔离。在设计过程中,首先通过坐标变换,使得不可观的状态及部分可观状态不受干扰影响,然后针对不可观的子系统利用可观状态的信息设计观测器,观测器中的部分参数利用LMI方法获得,可以弱化非线性部分对观测器的影响。所设计观测器的存在条件仅依赖于系统本身特性,无需在线验证。观测器采用降阶设计,同时借助LMI思想,结构简单,适合于非线性卫星姿态控制系统。仿真结果验证了降阶非线性未知输入观测器实现卫星姿态控制故障诊断的可行性与有效性。
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| 关 键 词： | 轨道控制 挠性卫星 姿态控制系统 RO-NUIO 故障诊断 |
Fault Diagnosis Based on RO-NUIO/LMI for Flexible Satellite Attitude Control Systems during Orbit Control |
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| HOU Qian,CHENG Yue-hua,JIANG Bin,LU Ning-yun.Fault Diagnosis Based on RO-NUIO/LMI for Flexible Satellite Attitude Control Systems during Orbit Control[J].Journal of Astronautics,2011(10). |
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| Authors: | HOU Qian CHENG Yue-hua JIANG Bin LU Ning-yun |
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| Institution: | HOU Qian1,CHENG Yue-hua1,2,JIANG Bin1,LU Ning-yun1(1.College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China,2.Academy of Frontier Science,China) |
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| Abstract: | During satellite orbit maneuver,the orbit control force causes disturbing torque and affects attitude of a satellite if the control force does not pass through the mass center of the satellite.In this paper,a set of reduced order nonlinear unknown input observers(RO-NUIO) are designed to detect and isolate faults.During the design process,the system is divided into three sub-systems to ensure that some states are not affected by the disturbance.Observers are designed by using the observable information.Mean... |
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| Keywords: | Orbit control Flexible satellite Attitude control system RO-NUIO Fault diagnosis |
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