电磁悬浮飞轮转子系统的模态解耦控制

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基于电磁悬浮飞轮转子系统的数学模型,首先提出了一种在高速下能够使电磁悬浮飞轮转子系统保持稳定运行的模态解耦控制方法,然后对这种方法的解耦效果以及控制的有效性进行了仿真分析,并与传统分散PD控制的性能进行了比较。结果表明提出的模态解耦控制方法可以实现对电磁轴承飞轮转子系统的转动模态和平动模态间的解耦,以达到对各个模态的刚度和阻尼进行独立调节,使电磁悬浮飞轮转子系统具有更好的动态性能和更强的抗干扰能力的目的。 For an active magnetic bearing-supported flywheel rotor system with significant gyroscopic effect,its high nutation mode frequency greatly affects its stability at high rotational speeds.Therefore,it is necessary to develop some advanced control methods which can be used to directly control the dynamical characteristics of rotor modes.For such a rotor,since significant coupling between conical and parallel modes,traditional decentralized PD controllers are not suitable any more.A new method called modal decoupling control is proposed in this paper.The method is based on mathematic models of flywheel rotor system which can stabilize the active magnetic bearing-supported flywheel rotor system at high rotational speeds.The principle of the modal decoupling control is introduced,and the decoupling control ability and effectiveness are analyzed numerically.It is shown that the proposed control can separately regulate each modal stiffness and damping through decoupling between conical and parallel modes,and obviously improve the dynamic behaviors and anti-interference capacities of active magnetic bearing-supported flywheel rotor system with significant gyroscopic effect.