Guardian maps based switching tracking control of large envelope hypersonic vehicles

Abstract

A guardian maps based switching control law is proposed to satisfy the stability and performance requirements for air-breathing hypersonic vehicles(AHSVs), which features large envelope and strong nonlinearity. Firstly, linear parameter varying(LPV) model of AHSV within the entire domain is established based on gap-metric principles. By incorporating PI-LQR method, a set of initial controllers are designed such that closed loop poles lie in desired region. Then, scheduling algorithm is designed for AHSV based on guardian maps. Different from traditional gain scheduling method, which interpolates controller gains designed for several operation points, the proposed method extends the performance of an initial controller carried out on an arbitrary operating point to the entire flight envelope. Finally, nonlinear simulation results are provided, which demonstrate that method proposed in this paper is capable of stabilizing AHSV and ensuring the satisfactory tracking performance within the entire envelope.