Event-Triggered Saturation-Tolerant Prescribed Control of Rigid Spacecraft With Actuator Faults

This paper introduces an event-triggered saturation-tolerant prescribed control (STPC) framework for rigid spacecraft subject to actuator faults and actuator saturation via a fixed-time disturbance observer (FTDO). An FTDO with time-varying observer gains is initially developed to reconstruct the lu...

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Bibliographic Details
Published inIEEE transactions on circuits and systems. I, Regular papers pp. 1 - 13
Main Authors Cheng, Peng, Luo, Wenjun, Liu, Chenjun, Li, Jiacheng, Liu, Jason J. R., Li, Dapeng, Liu, Yan-Jun
Format Journal Article
LanguageEnglish
Published IEEE 30.06.2025
Subjects
Actuator faults
actuator saturation
Actuators
Attitude control
Circuit faults
Convergence
Event detection
event-triggered scheme
Materials requirements planning
prescribed performance
rigid spacecraft
Space vehicles
Uncertainty
Upper bound
Vectors
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ISSN1549-8328
1558-0806
DOI10.1109/TCSI.2025.3582878

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Summary:This paper introduces an event-triggered saturation-tolerant prescribed control (STPC) framework for rigid spacecraft subject to actuator faults and actuator saturation via a fixed-time disturbance observer (FTDO). An FTDO with time-varying observer gains is initially developed to reconstruct the lumped perturbations caused by external disturbances, parameter uncertainties, and actuator faults. A fixed-time auxiliary system is employed to counter the adverse effects of actuator saturation. Additionally, asymmetric prescribed performance and shift functions are skillfully incorporated to handle arbitrary bounded initial conditions. Subsequently, a novel FTDO-based event-triggered STPC strategy is formulated, ensuring that attitude-tracking errors converge to predefined performance bounds within a predetermined time while minimizing unnecessary control signal updates. The practical fixed-time stability of all closed-loop signals is validated, with the strict avoidance of Zeno behavior. Finally, simulation studies are conducted to verify the accuracy and effectiveness of the proposed approach.
ISSN:1549-8328
1558-0806
DOI:10.1109/TCSI.2025.3582878