Abstract: Global Variable Structure Model Following Control ( GVSMFC) Theory, a new variable structure controlapproach, is introduced to aero engine control systems. This approach can efficiently shorten the time during whichsystem initial states reach the sliding model, overcome the sensitivity of Constant Variable Structure Control (CVSC)to uncertainties during this period, and thus enhance the robustness of the system. Furthermore, The design of itscontrol principle also improves transient performance of the system. Based on this theory, an aero engine GVSMFCsystem is designed and studied. The reference model designed via the state feedback method meets the performancetargets and theory-matching requirements in addition to complete uncoupling. It is shown that the control systemhas good following performance, and possesses strong ability of anti2disturbance and anti-variation of model parameters.

Key words: variable structure control, model following control, aero engine