Adaptive Model Following Control Method for Actively Controlled Magnetic Bearing Momentum Wheel

For the active control of magnetic bearing momentum wheels that could be used as actuators of high-accuracy spacecraft attitude control system, an adaptive model following control method is presented in this paper. This method is featured by adaptive bandwidth-regulation mechanism, controller with logical derivative, new nutation damping network, and non-linearity compensator. Thus it is convenient to make compromise between fast dynamic response and active-vibration suppression at harmonic frequencies of the wheel rotation. The robust stability of this method is analyzed and digital simulation is carried out. Simulation results show that this method has great capability of active-vibration suppression, good dynamic response, and satisfactory nutation damping of the wheel rotor for a large range of wheel rotational speed.