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Phase-lag-compensation-based same-frequency vibration force suppression method and control system of magnetically suspended flywheel

A technology of suspension control and phase lag, applied in general control systems, control/regulation systems, mechanical oscillation control, etc. The effect of robust time-varying co-frequency vibration force suppression performance, high precision and stability

Active Publication Date: 2018-05-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Problems solved by technology

On the other hand, the active vibration algorithm is "embedded" in the basic suspension control system of the magnetic bearing, and works simultaneously with the basic controller, which will inevitably affect the stability of the entire control system

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  • Phase-lag-compensation-based same-frequency vibration force suppression method and control system of magnetically suspended flywheel
  • Phase-lag-compensation-based same-frequency vibration force suppression method and control system of magnetically suspended flywheel
  • Phase-lag-compensation-based same-frequency vibration force suppression method and control system of magnetically suspended flywheel

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Embodiment Construction

[0055] The same-frequency vibration force suppression method proposed by the present invention, the main control idea includes two aspects. On the one hand, the phase-shift notch filter is used to suppress the same-frequency current disturbance in the full speed range; on the other hand, the proportional compensation item and the additional compensation item are used to Eliminate the residual co-frequency vibration force component in the displacement stiffness as much as possible.

[0056] The present invention will be described in detail below in conjunction with the accompanying drawings and specific implementation steps.

[0057] The magnetic bearing structure of the research object in the embodiment is a magnetic levitation flywheel composed of a five-degree-of-freedom permanent magnetic bias hybrid magnetic bearing. A two-degree-of-freedom radial magnetic bearing is used to control radial translational motion, and a pair of three-degree-of-freedom axial magnetic bearings a...

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Abstract

The invention discloses a phase-lag-compensation-based same-frequency vibration force suppression method and control system of a magnetically suspended flywheel. For a magnetically suspended flywheel,a magnetically suspended rotor kinetic model including a same-frequency vibration force is established by considering rotor mass imbalance; with a phase-shift trap filter, a same-frequency disturbance component in a control current at a time-varying rotation speed frequency is eliminated effectively; and then a residual same-frequency vibration force in displacement stiffness is eliminated completely by using a proportional compensation term and an additional compensation term. Therefore, the high-precision and high-robustness time-varying same-frequency vibration force suppression performance is obtained; and the suppression method and control system have the reference significance in active vibration control of a magnetic suspension-rotor system.

Description

technical field [0001] The invention belongs to the field of active vibration control of a magnetic suspension-rotor system, and in particular relates to a method and a control system for suppressing the same-frequency vibration force of a magnetic suspension flywheel based on phase lag compensation. Background technique [0002] The main source of vibration in a maglev flywheel is the unbalanced mass of the rotor. The mass imbalance of the rotor will cause the geometric axis of the rotor to be inconsistent with the inertial axis, resulting in vibration with the same frequency as the flywheel speed. The same-frequency vibration force of the maglev flywheel is mainly composed of two parts, one is the disturbance of the same-frequency control current in the coil, and the other is the residual same-frequency vibration component from the displacement stiffness of the magnetic bearing. Mass unbalance compensation technology has been widely used to reduce the disturbance of co-fr...

Claims

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Application Information

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IPC IPC(8): G05D19/02G05B13/04
CPCG05B13/042G05D19/02
Inventor 彭聪何家希邓智泉
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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