Robust variable structure attitude control with L2-gain performance for a flexible spacecraft including input saturation

2009 ◽  
Vol 224 (2) ◽  
pp. 153-167 ◽  
Author(s):  
Q Hu ◽  
M I Friswell
Keyword(s):  
Attitude Control ◽  
Input Saturation ◽  
Variable Structure ◽  
Flexible Spacecraft ◽  
L2 Gain

Robust constrained fault-tolerant attitude control for flexible spacecraft

2017 ◽  
Vol 232 (16) ◽  
pp. 3011-3023 ◽  
Author(s):  
Haihui Long ◽  
Jiankang Zhao
Keyword(s):  
Attitude Control ◽  
Fault Tolerant ◽  
External Disturbance ◽  
Input Saturation ◽  
Flexible Spacecraft ◽  
Disturbance Attenuation ◽  
Actuator Faults ◽  
Partial Loss ◽  
Unknown Parameters ◽  
Disturbance Model

In this paper, robust constrained fault-tolerant attitude controllers are proposed for flexible spacecraft subjected to external disturbance, model uncertainty, input saturation, and actuator faults. Three types of actuator faults of spacecraft, i.e. partial loss of effectiveness, stuck fault, and outage fault, are modeled explicitly. To handle these actuator faults, a significant lemma is proposed and rigorous proof is conducted at length. By introducing two e-modification parameter update laws to online estimate the unknown parameters caused by actuator faults, constrained fault-tolerant attitude controllers of flexible spacecraft are designed to accommodate these faults without the need of any prior information about these faults. The proposed controllers can achieve the disturbance attenuation in the sense of [Formula: see text] gain. The effectiveness of the proposed algorithms is assessed through numerical simulations.

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