基于双模型自适应估计的大气数据传感器故障诊断方法  

Fault diagnosis method of air data sensor based on double-model adaptive estimation

作　　者：肖盈飞 刘海颖[1,2] 程月华 李铁香[2,4] XIAO Yingfei;LIU Haiying;CHENG Yuehua;LI Tiexiang(College of Astronautics,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;Nanjing Center for Applied Mathematics,Nanjing 211135,China;College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China;School of Mathematics,Southeast University,Nanjing 211189,China)

机构地区：[1]南京航空航天大学航天学院,江苏南京210016 [2]南京应用数学中心,江苏南京211135 [3]南京航空航天大学自动化学院,江苏南京210016 [4]东南大学数学学院,江苏南京211189

出　　处：《系统工程与电子技术》2024年第11期3792-3799,共8页Systems Engineering and Electronics

基　　金：中国航空科学基金(201908052002)资助课题。

摘　　要：大气湍流是大气中一种不规则的随机运动,在机载大气数据传感器的测量过程中,大气湍流影响与传感器故障相互耦合,导致大气数据传感器故障诊断算法无法将故障与湍流影响解耦。针对大气湍流影响下的大气数据传感器故障诊断问题,基于惯性测量单元和导航姿态解算,考虑湍流对大气系统的影响,建立新型大气系统模型及量测模型。在对双模型自适应估计算法进行扩展后,引入湍流对系统影响的协方差自适应更新方法,实现存在未知扰动情况下故障状态的无偏估计。仿真结果表明,该算法可以有效实现对固定偏差故障、漂移偏差故障和振荡故障的诊断。Atmospheric turbulence is an irregular random motion in the atmosphere.During the measurement of airborne air data sensors,atmospheric turbulence effects and sensor faults are coupled with each other,leading to the inability of air data sensor fault diagnosis algorithms to decouple faults from turbulence effects.In view of the fault diagnosis problem of air data sensors under the effects of atmospheric turbulence,a new atmospheric system model and measurement model are developed based on inertial measurement units and navigation attitude solving,considering the effects of turbulence on the atmospheric system.After extending the double-model adaptive estimation algorithm,the covariance adaptive update of the effect of turbulence on the system is introduced to achieve an unbiased estimation of the fault state in the presence of unknown disturbances.Simulation results show that the algorithm can effectively achieve diagnosis of fixed deviation faults,drift deviation faults,and oscillation faults.

关 键 词：大气数据传感器故障诊断 大气湍流 双模型自适应估计 故障检测与诊断 

分 类 号：V241.6[航空宇航科学与技术—飞行器设计]