磁悬浮飞轮低功耗控制方法仿真研究

在储能、航天领域中应用磁悬浮飞轮时,系统功耗是需要解决的一个关键问题。在高转速下,飞轮陀螺效应对转子稳定影响很大,控制器需要对其进行抑制。为此,需要研究低功耗控制方法。该文昕设计的控制器,既考虑了陀螺力矩的抑制,又考虑了功耗的降低,将控制力与控制电流分别进行设计。控制力采用位移交叉算法产生,以抑制陀螺力矩;而控制电流根据所需控制力,采用非线性方法构建,实现了零偏置电流和电磁铁的单边工作,从而降低系统功耗。仿真结果表明,此低功耗控制方法可在高转速下稳定系统。

Zero-power control method for a flywheel suspended by active magnetic bearings

In energy storage and aerospaee fields, system power loss is a key problem in magnetic-bearing-supported flywheels. At high rotational speeds. gyroscopic effects in the flywheel rotor greatly influence rotor stability , so they must be restrained by the controllers. This paper presents an analysis of a zero-power control. The controller restrains the gyroscopic torque and reduces the system power loss. The controller design separates the design of the control forces from the design of the currents in the magnetic coils. A displacement cross feedback method was used to compute the control forces needed to restrain gyroscopic torques. A nonlinear method was used to compute the currents in the magnetic coils according to the control forces. The system power was reduced by zero bias currents with only one of each pair of magnets working at any time. The simulation results show that the zero-power control method can stabilize a high-speed flywheel rotor.