Finite-time Fault Tolerant Attitude Control for Over-activated Spacecraft Subject to Actuator Misalignment and Faults

AH Zhang (Bohai University, PR China), QL Hu (Harbin Institute of Technology, PR China) & MI Friswell (Swansea University)

IET Control Theory and Applications, Vol. 7, No. 16, November 2013, pp. 2007-2020

Abstract

A finite-time attitude compensation control scheme is developed for an over-activated rigid spacecraft subject to actuator faults, misalignment, external disturbances, and uncertain inertia parameters. The controller is synthesized based on sliding mode control theory, and guarantees the finite-time reachability of the system states. A sufficient condition for the controller to accommodate misalignment and faults of actuator is presented. An optimized control allocation algorithm based on the Karush Kuhn Tucker (KKT) condition is then applied to distribute the commanded control to each actuator, and optimize the consumption of energy. Numerical simulation results are presented that highlight the performance benefits of the control law.

Paper Availability

This material has been published in the IET Control Theory and Applications, Vol. 7, No. 16, November 2013, pp. 2007-2020. Unfortunately the copyright agreement with IET does not allow for the PDF file of the paper to be available on this website.


Link to paper using doi: 10.1049/iet-cta.2013.0133

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