A Lyapunov method based multiple-model adaptive actuator failure compensation scheme for control of near-space vehicles

Abstract

In a recent paper [7], a multiple-model adaptive actuator failure compensation control scheme is proposed for the control of a near-space vehicle, using the gradient algorithm, to achieve fast and accurate actuator failures compensation. In this paper, a new multiple-model adaptive actuator failure compensation control scheme is developed for nonlinear systems motivated from a near-space vehicle control application. Such a design also employs multiple controllers based on multiple-model failure estimations and a control switching mechanism, based on finding the minimal performance cost index, to select the most appropriate controller. Different from [7], each estimator is designed based on the Lyapunov method, which ensures the system stability and desired tracking properties. Moreover, a smooth control are introduced to the multiple-model control system frame to avoid the discontinuity problem from the control switching, to widen the application of such design. Simulation results for a near-space vehicle dynamic model are presented to show the desired failure compensation performance.