Missile gain-scheduled autopilot design using D-K-D iteration

Missile gain-scheduled autopilot should not only adapt to the variations of time-varying parameters, but also restrain unmeasured uncertainties. By describing missile autopilot design problem as a robust gain-scheduled problem of linear parameter-varying(LPV) system with unmeasured uncertainties, we establish a model matching autopilot design structure, and a missile robust gain-scheduled autopilot is then designed by combining the LPV control approach and the ?-synthesis approach through the D-K-D iteration. The designed autopilot not only adjusts parameters automatically with respect to the flight Mach number and altitude, but also restrains unmeasured uncertainties such as measurement noise, measurement errors and modeling errors. Simulation results validate the effectiveness and feasibility of the approach.