A new online delay estimation-based robust adaptive stabilizer for multi-input neutral systems with unknown actuator nonlinearities

2017 ◽  
Vol 70 ◽  
pp. 139-148 ◽  
Author(s):  
A.H. Tahoun
Keyword(s):  
Delay Estimation ◽  
Neutral Systems ◽  
Actuator Nonlinearities ◽  
Robust Adaptive ◽  
Adaptive Stabilizer

Robust adaptive fault tolerant attitude control for post-capture non-cooperative targets with actuator nonlinearities

2017 ◽  
Vol 40 (7) ◽  
pp. 2116-2128 ◽  
Author(s):  
Zheng Wang ◽  
Jianping Yuan ◽  
Yong Shi ◽  
Dejia Che
Keyword(s):  
Attitude Control ◽  
Control Structure ◽  
Control Method ◽  
Fault Tolerant ◽  
Dead Zone ◽  
Measurement Information ◽  
Attitude Stabilization ◽  
Control Scheme ◽  
Actuator Nonlinearities ◽  
Robust Adaptive

This paper develops an attitude takeover control structure for post-capture non-cooperative targets with actuator nonlinearities and faults. In this paper, the contingent actuator gain faults, deviation faults and the undesirable non-symmetric dead-zone nonlinearities of the actuator are all under consideration. An effective robust adaptive fault tolerant attitude control method is synthesized such that the actuator nonlinearities and faults can be well handled. As a result, the accurate attitude stabilization and tracking are maintained. Moreover, an extended fault tolerant attitude control scheme that can work well in the presence of inaccurate measurement information is proposed. Based on a quadratic Lyapunov function, the proof of the convergence is completed. Simulation results demonstrate the effectiveness and advantages of the proposed method.

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