Barrier function-based prescribed-performance adaptive attitude tracking control for spacecraft with uncertainties.

This paper addresses the problem of robust adaptive attitude tracking control for spacecraft with mis-matched and matched uncertainties. The idea of disturbance estimation and compensation is introduced into the control design. First, finite-time disturbance observers are developed for different channels of spacecraft based on barrier functions for achieving finite-time asymptotic estimates of unknown bounded uncertainties in the system. Second, a class of prescribed performance functions is considered in the design of the barrier function. The spacecraft attitude adaptive tracking control strategy with finite -time convergence capability and prescribed performance is proposed based on the designed finite-time disturbance observers and barrier function. Finally, the theoretical findings are verified by numerical simulations and compared with the simulation results of existing methods. & COPY; 2023 The Franklin Institute. Published by Elsevier Inc. All rights reserved.