基于二阶广义积分–锁频环的磁悬浮转子自适应自动平衡

Adaptive Auto Balancing of Magnetically Suspended Rotor Based on Second Order Generalized Integrator-frequency Locked Loop

针对无转速传感器条件下磁悬浮转子系统的振动控制问题,提出一种基于二阶广义积分–锁频环的转速自适应自动平衡算法。首先,基于磁悬浮转子的不平衡动力学模型,分析零电流和零轴承力控制的原理。然后,利用二阶广义积分–锁频环自身的陷波通道和频率估计特性构造自适应零电流控制策略,并进一步设计其相移版本。在此基础上,对引入该算法后闭环系统的稳定性进行分析。最后,通过仿真和实验证明,该算法具有良好的转速自适应跟踪估计能力,并且能有效抑制转子系统向基座传递的振动。

For the vibration control of the magnetically suspended rotor system under no speed sensor condition,a speed adaptive auto balancing algorithm based on second order generalized integral-frequency locked loop(SOGI-FLL)was proposed.Firstly,the principle of zero current and zero bearing force control was analyzed based on the unbalanced dynamic model of the magnetically suspended rotor.Then,an adaptive zero current control strategy was constructed based on the notch channel and frequency estimation characteristics of SOGI-FLL,and its phase shift version with was further designed.On this basis,the stability of the closed-loop system with the algorithm was analyzed.Finally,simulation and experiment results prove that the algorithm has good speed adaptive estimation performance,and can effectively suppress the transmitted vibration to the base from the rotor system.