The reachability qualification to trim AOA by moving mass method was analyzed.For the unstable problem of mass moment control when aerodynamic moment is less than the inertia slide moment,partial attitude angular speed feedback condition without inertia moment was achieved by using internal model principle and slide dynamic observers and unifying inverse decoupling mechanism.Stable control of moving mass under weak aerodynamic environment was realized by using self-adaptable PD controller.Simulation results verify the validity of the method．
; 张珩
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