Variable Structure Of The Final Sliding Mode Control Applied Research In The Aero-engine

In contrast to other variable control methods, Variable Structure Terminal Sliding Mode Control (VSTSMC) avoids local sliding mode existing on each switching hyper plane. Therefore, the system states can enter terminal sliding mode directly with desired dynamic characteristics. This method can improve the transient performance efficiently and guarantee the global asymptotical stability (or global stability).In this paper, the method designing aero engine VSTSMC controller on the basis of VSTSMC theory is deeply investigated. Aero engine VSTSMC controller and terminal sliding mode variable structure model following controller are separately designed. Furthermore, reference model designed for the system meets performance target, theory matched requirement, and achieves complete uncoupling. Simulation results show that the designed controller are well and possesses strong ability of anti-noise and anti-changing to model parameters, terminal sliding mode variable structure model following controller has good following performance. The stability of model reference variable structure system with mismatched uncertainties is also analyzed.In addition, some problems about engineering applications including the influence of regulating parameter to system control effect and the adaptability of the model following controller in flight envelope are discussed.