Finite-time sliding mode attitude control for a reentry vehicle with blended aerodynamic surfaces and a reaction control system

摘要: Abstract This paper proposes a finite-time robust flight controller, targeting for reentry vehicle with blended aerodynamic surfaces and reaction control system (RCS). Firstly, novel attitude controller is pointed out the introduction of nonsingular sliding mode manifold. The tracking errors are mathematically proved to converge zero within finite time which can be estimated. In order improve performance, second-order further developed effectively alleviate chattering without any deterioration robustness accuracy. Moreover, an optimization allocation algorithm, using linear programming pulse-width pulse-frequency (PWPF) modulator, designed allocate torque commands all surface deflections on–off switching-states RCS thrusters. Simulations provided considering uncertain parameters external disturbances practical purposes, results demonstrate effectiveness system.