$H_\infty$ Refined Antidisturbance Control of Switched LPV Systems With Application to Aero-Engine

In this paper, a parameter-dependent multiple discontinuous Lyapunov function (PMDLF) approach is proposed to study the <inline-formula><tex-math notation="LaTeX">$H_\infty$</tex-math></inline-formula> refined antidisturbance control problem of switched linear parameter-varying systems. The <inline-formula><tex-math notation="LaTeX">$H_\infty$</tex-math></inline-formula> refined antidisturbance means the disturbance appearing in the control channel can be accurately compensated by means of the estimation of the disturbance and the energy bounded external disturbance can be restrained. A key point is to set up a PMDLF framework that provides an effective tool for attenuating the energy bounded disturbances and rejecting the disturbances generated by the exosystem accurately. A parameter-driven and dwell time-dependent switching law is designed, and a solvability condition ensuring the <inline-formula><tex-math notation="LaTeX">$H_\infty$</tex-math></inline-formula> refined antidisturbance performance is developed. Then, the <inline-formula><tex-math notation="LaTeX">$H_\infty$</tex-math></inline-formula> refined antidisturbance switched parameter-dependent disturbance observers and the disturbance observer-based refined controllers are established to achieve required disturbance attenuation and rejection. Finally, an example of an aero-engine control system is given to verify the availability of the acquired approaches.