Multiple linear models tracking control via switching strategy and the application to aero-engine

For the linearized models based on the multiple operating points, this paper studies the switching control problem of the switching process from the initial point to the target point. First, the problem is described as a switching tracking problem with state constraints and basic controller, regulating controller and protecting controller are designed respectively. Second, in order to ensure that each controller works within the effective range of the respective models, the basic controller and the regulating controller switch in a rational way. The sufficient conditions of the switching strategy are proposed. Third, based on the safety margin, an efficient switching rule for the subsystems is proposed to make the output finally stabilized to the target point. Fourth, in the protection based scheme, accelerating loop and protecting loop work in turn to ensure that the output tracks to the target point in a safe way. Finally, the proposed method is applied to the safety protection system of the engine, and the simulation results verify the effectiveness of the proposed method.