A Vibration Torque Suppression Method of Magnetic Suspension Flywheel Based on Synchronous Rotation Coordinate Transformation Algorithm

A technology for synchronously rotating coordinates and vibration suppression, which is applied in mechanical oscillation control, non-electric variable control, control/regulation systems, etc.

CN109189114BActive Publication Date: 2019-08-02NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2019-08-02

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Abstract

The invention relates to a magnetic suspension flywheel vibration moment suppression method based on a synchronous rotation coordinate transformation algorithm, and belongs to the field of magnetic suspension flywheel vibration suppression. The method comprises the steps of: establishing a magnetic suspension flywheel kinetic model; establishing an unbalanced force and an unbalanced moment model based on the model; reconstructing a control system with complex coefficients to simplify the structure of the system and to reduce the orders; introducing the synchronous rotation coordinate transformation by establishing a stationary coordinate system and a rotation coordinate system; and identifying the same-frequency component in the vibration moment using the synchronous rotation coordinate transformation, and taking the obtained same-frequency component as the input of a controller to suppress the same-frequency vibration moment. According to the magnetic suspension flywheel vibration moment suppression method based on the synchronous rotation coordinate transformation algorithm, the vibration moment generated by the mass imbalance of magnetic suspension rotors is suppressed based onthe synchronous rotation coordinate transformation algorithm, thereby achieving the control effect of effectively suppressing the vibration moment under the condition of full speed range and ensuringthe system stability.
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Description

technical field

[0001] The invention belongs to the field of magnetically suspended flywheel vibration suppression, in particular to a method for suppressing unbalanced vibration moments based on synchronous rotation coordinate transformation. Background technique

[0002] Magnetic bearings support the rotor without friction, which makes magnetic bearings a perfect replacement for existing mechanical bearings. However, due to the limitation of the manufacturing process level, the rotor still has mass imbalance, which leads to the misalignment of its main axis of inertia and geometrical main axis. This will generate corresponding unbalanced vibration, and the vibration force generated by the magnetic bearing will have a great influence on the stability of the magnetic levitation flywheel system. Usually, the purpose of the magnetic suspension bearing control system is to control a rotor with 5 degrees of freedom. Generally, the magnetic suspension rotor has two main forms, e...

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Embodiment Construction

[0083] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0084] The present invention proposes a method for suppressing the vibration torque of a maglev flywheel based on synchronous rotation coordinate transformation. The method is to directly use the same frequency vibration force as the control target and use the constructed electromagnetic force as the input of synchronous rotation coordinate transformation, and directly add the output of coordinate transformation The current loop of the original system constitutes a wave trap, so that the same frequency vibration force can be effectively suppressed in the full speed range under the condition of system stability.

[0085] In order to further illustrate the method proposed by the present invention, the theoretical derivation process of the method of the present invention is given below.

[0086] Step 1, establishing the dynamic model of the maglev flywheel, and ...