Adaptive backstepping event‐triggered attitude tracking fault‐tolerant control for spacecraft systems

Abstract

SummaryThis article is dedicated to study the problem of attitude tracking fault‐tolerant control for fractionated spacecraft via wireless communication. The practical case is that the spacecraft system always subject to external disturbances, uncertain inertia parameters, and even unknown actuator faults. Under the backstepping control scheme framework, an adaptive attitude tracking fault‐tolerant controller is constructed, where the triggering strategy is set not only in the sensor‐to‐controller channel, but also in the controller‐to‐actuator channel. Hence, continuous communication and Zeno phenomenon are successfully avoided. Then, a fuzzy‐logic system is used to deal with system parameter uncertainties and adaptive control schemes are constructed to estimate unknown parameters. By using Lyapunov function theory, the uniform ultimate boundedness of the closed‐loop system is proved. Finally, the validity of the developed method is demonstrated via simulation results.