基于复合前馈补偿的混合磁悬浮CMG转子主动振动控制

摘要

Whenanactive-passivehybridmagneticallysuspendedControlMomentGyro(CMG)rotorrotates, synchronous vibrations will be caused.To achieve its active control,the coupling characteristics along with the change of the radial deflection angles between passive and active bearings were analyzed.On this basis,a composite feedforward compensation method for active vibration control of active-passive hybrid magnetically suspended rotor was proposed.The impact of coupling magnetic forces between active and passive bearings was taken into account in the process of lead feedforward compensation for displacement stiffness forces.And the coupling current stiffness forces were compensated between the two radial passages.The simulation results show that,the proposed method can reduce the synchronous bearing forces to 9 .3% of those without compensating the couplings.%为实现混合磁悬浮控制力矩陀螺转子高速旋转时产生与转速同频振动的主动控制，分析被动磁轴承径向平动自由度耦合磁力随转子径向扭转角的变化规律，提出基于复合前馈补偿的混合磁悬浮转子主动振动控制方法；在同频位移刚度力超前前馈补偿中考虑被动磁轴承径向耦合磁力影响，并在两径向通道之间补偿同频耦合电流刚度力。仿真结果表明，该方法可使同频轴承力减小至未补偿前的9．3％，从而验证该方法的有效性。