基于最优控制的转子不平衡补偿的研究

磁悬浮转子高速运行过程中,不平衡振动是影响其运行动态品质的主要原因,由于振幅过大、功放饱和等问题,导致系统无法继续提升转速.文中介绍了永磁偏置磁轴承的工作原理和数学模型,在零电流原则基础上,研究了一种基于最优控制的高速磁悬浮转子不平衡振动补偿的方法.仿真结果表明,该方法在转子高速运转时有效地减小了磁轴承功放的控制电流和转子的振动,提高了系统的可靠性和稳定性,为进一步提高磁悬浮转子转速创造了条件.

Study on Unbalance Compensation for Rotor of Magnet Suspension Based on Optimal Control

When the rotor of magnet suspension rotates at high speed, unbalance vibration is the most important reason affecting it''s dynamic quality. This paper introduced working principle and mathematical model of permanent magnet biased magnetic bearing(PMB). On the base of current-free operation, a kind of unbalance compensation based on optimal control was studied. The simulation results indicated that this method could successfully reduce the control current of PMB''s power amplifier and vibration of rotor when it rotates at high speed, and improve the dependability and stability of system. Therefore it could make it possible to increase rotate speed of magnet suspension''s rotor furthermore.