Spacecraft Attitude Fault-Tolerant Control Based on Iterative Learning Observer and Control Allocation

2021 ◽  
pp. 133-155
Author(s):  
Qinglei Hu ◽  
Bo Li ◽  
Bing Xiao ◽  
Youmin Zhang
Keyword(s):  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Iterative Learning ◽  
Control Allocation ◽  
Spacecraft Attitude ◽  
And Control

The Study of the Relation Between Faulty Tolerant Bound and Control Allocation

2012 ◽  
Vol 433-440 ◽  
pp. 4077-4081
Author(s):  
Xiao Jie Zhang ◽  
You Long Chen ◽  
Xiao Ping Zhang
Keyword(s):  
Fault Tolerant ◽  
Fault Tolerant Control ◽  
Control Surface ◽  
Control Allocation ◽  
And Control

Fault tolerant control can improve the safety of aircraft under control surface failures. Sometime the redundancy method losses its effectiveness when the actuator is impaired severely. Under this condition the fault tolerant method can not be used to compensate failures. The paper proposes a method to find the bound by analysis and computer by moment for fault tolerant control. And give the effect on control allocation. At last the fault tolerant bound is added to control allocation as one of limit conditions.

scholarly journals Comparing the Performance of Reference Trajectory Management and Controller Reconfiguration in Attitude Fault Tolerant Control

2018 ◽  
Vol 151 ◽  
pp. 04008
Author(s):  
Rouzbeh Moradi ◽  
Alireza Alikhani ◽  
Mohsen Fathi Jegarkandi
Keyword(s):  
Control Problem ◽  
Closed Loop ◽  
Fault Tolerant ◽  
Dynamic Performance ◽  
Fault Tolerant Control ◽  
Spacecraft Attitude ◽  
Reference Trajectory ◽  
System Behavior ◽  
Closed Loop System ◽  
Reference Trajectories

Reference trajectory management is a method to modify reference trajectories for the faulty system. The modified reference trajectories define new maneuvers for the system to retain its pre-fault dynamic performance. Controller reconfiguration is another method to handle faults in the system, for instance by adjusting the controller parameters (coefficients). Both of these two methods have been considered in the literature and are proven to be capable of handling various faults. However, the comparison of these two methods has not been considered sufficiently. In this paper, a controller reconfiguration mechanism and a reference trajectory management are proposed for the spacecraft attitude fault tolerant control problem. Then, these two methods are compared under the same conditions, and it is shown that the proposed controller reconfiguration has better performance than the proposed reference trajectory management. The reason is that the controller reconfiguration has more variables to modify the closed-loop system behavior.

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