基于Maksimov算法的航天器姿控推力器故障诊断  

On-Line Fault Diagnosis of Spacecraft Attitude Control Thruster Based on Improved Maksimov Estimation Algorithm

作　　者：张如飞[1] 周军[1] 于晓洲[1] 

机构地区：[1]西北工业大学精确制导与控制研究所,西安710072

出　　处：《振动．测试与诊断》2010年第4期409-413,共5页Journal of Vibration,Measurement & Diagnosis

基　　金：航天基金资助项目(编号:53103-0200-N7CH006);教育部博士点基金资助项目(编号:20070699004)

摘　　要：针对已有航天器姿控推力器故障诊断系统功能有限且尚未涉及低泄漏故障诊断的问题,基于非线性姿态动力学和改进的Maksimov非线性系统输入估计算法,提出了航天器姿控推力器在线故障诊断方案。它基于Maksi-mov输入估计,计算了推力有效性因子,实现了推力损失检测,并基于绝对式光电编码器,提出了飞轮反作用力矩估计方法,实现了推进剂泄漏特别是低泄漏故障检测。仿真推力损失和推进剂泄漏故障并应用所提方案进行了故障诊断,表明了该方案的有效性和实用性。By considering that the present spacecraft attitude control thruster fault diagnosis systems have limited functions and have not involved low leakage fault diagnosis,a scheme for spacecraft attitude control thruster fault diagnosis is proposed based on nonlinear attitude dynamics and improved Maksimov nonlinear input estimate algorithm.According to the estimated spacecraft attitude control input from Maksimov algorithm,thrust effectiveness factor is calculated and the detection of thrust loss is carried out,and based on absolute optical encoder,reaction torque estimate of flywheel is presented and the detection of propellant leak,especially low propellant leak is implemented.Thrust loss and propellant leak faults are simulated and diagnosed by the proposed scheme,and the effectiveness and practicality of the scheme are demonstrated.

关 键 词：航天器 姿控推力器 故障诊断 Maksimov估计 有效性因子 

分 类 号：TP206[自动化与计算机技术—检测技术与自动化装置] V448.2[自动化与计算机技术—控制科学与工程]