轨道调控期间,轨道控制推力会对挠性航天器的质心运动与姿态运动产生影响。针对轨道控制期间挠性航天器姿态控制系统的执行机构故障问题,提出了一种基于扩张状态观测器(extended state observer,ESO)的滑模容错控制算法。该算法将执行...轨道调控期间,轨道控制推力会对挠性航天器的质心运动与姿态运动产生影响。针对轨道控制期间挠性航天器姿态控制系统的执行机构故障问题,提出了一种基于扩张状态观测器(extended state observer,ESO)的滑模容错控制算法。该算法将执行器故障,系统干扰及参数摄动量视为未知动态,通过设计相应的扩张状态观测器,能有效的实现对滑模状态量及未知动态的估计;在此基础上,利用未知动态的估计信息,设计了滑模容错控制控制律。最后,针对轨控期间反作用飞轮故障的挠性航天器姿态系统进行了仿真研究,仿真结果表明该算法能够有效处理执行器故障并使闭环系统稳定。展开更多
The operating environment of the diesel engine air path system is complex and may be affected by external random disturbances.Potentially leading to faults.This paper addresses the fault-tolerant control problem of th...The operating environment of the diesel engine air path system is complex and may be affected by external random disturbances.Potentially leading to faults.This paper addresses the fault-tolerant control problem of the diesel engine air path system,assuming that the system may simultaneously be affected by actuator faults and external random disturbances,a disturbance observer-based sliding mode controller is designed.Through the linear matrix inequality technique for solving observer and controller gains,optimal gain matrices can be obtained,eliminating the manual adjustment process of controller parameters and reducing the chattering phenomenon of the sliding mode surface.Finally,the effectiveness of the proposed method is verified through simulation analysis.展开更多
文摘轨道调控期间,轨道控制推力会对挠性航天器的质心运动与姿态运动产生影响。针对轨道控制期间挠性航天器姿态控制系统的执行机构故障问题,提出了一种基于扩张状态观测器(extended state observer,ESO)的滑模容错控制算法。该算法将执行器故障,系统干扰及参数摄动量视为未知动态,通过设计相应的扩张状态观测器,能有效的实现对滑模状态量及未知动态的估计;在此基础上,利用未知动态的估计信息,设计了滑模容错控制控制律。最后,针对轨控期间反作用飞轮故障的挠性航天器姿态系统进行了仿真研究,仿真结果表明该算法能够有效处理执行器故障并使闭环系统稳定。
基金Supported by the National Key R&D Program of China(2021YFB2011300)the National Natural Science Foundation of China(52275044,52205299)+1 种基金the Zhejiang Provincial Natural Science Foundation of China(Z23E050032)the China Postdoctoral Science Foundation(2022M710304).
文摘The operating environment of the diesel engine air path system is complex and may be affected by external random disturbances.Potentially leading to faults.This paper addresses the fault-tolerant control problem of the diesel engine air path system,assuming that the system may simultaneously be affected by actuator faults and external random disturbances,a disturbance observer-based sliding mode controller is designed.Through the linear matrix inequality technique for solving observer and controller gains,optimal gain matrices can be obtained,eliminating the manual adjustment process of controller parameters and reducing the chattering phenomenon of the sliding mode surface.Finally,the effectiveness of the proposed method is verified through simulation analysis.
