基于IMM/EA的卫星姿态控制系统重构容错控制

研究了在轨卫星姿态控制系统发生可修复性故障状况下的系统重构容错控制。对于处于稳态的三轴稳定卫星,当姿态发生突变时,启动故障检测与诊断(FDD)子系统,采用交互式多模型(IMM)算法得到故障发生的位置以及故障模型,同时利用故障模型中的动力学系统进行特征结构配置(EA),生成重构控制器对原系统进行补偿控制。将FDD过程与重构控制器的设计过程结合,避免了单独设计FDD子系统然后再进行系统重构带来的计算量和时间延迟。最后通过数值仿真验证了该算法的有效性。

IMM/EA-based on-orbit reconfigurable fault-tolerant control for satellite attitude control system

This paper investigates the reconfiguration fault-tolerant control method of the on-orbit satellite attitude control system with recovered faults.For a three-axis stability satellite in steady phase,starting the fault detection and diagnosis(FDD) subsystem when the attitude changes suddenly.In the FDD subsystem, an interacting multiple model(IMM) algorithm is developed to estimate the location and model of the fault system,the dynamic part of this model is used in eigenstructure assignment(EA).Then a reconfiguration fault-tolerant controller is carried out to compensate the primary controller.The FDD process and the reconfiguration controller design are combined to avoid the large amount of computation and delay while design the FDD subsystem and reconfiguration controller separately.In the last,mathematical simulation validats the solution in a satellite closed-loop attitude control system.