Complex coefficient method-based magnetic suspension flat rotor system nutation frequency analysis method

A technology of magnetic suspension rotor and analytical method, applied in the field of magnetic suspension flat rotor system control, can solve the problem of lack of in-depth research on quantitative analysis of nutation frequency, and achieve the effects of improving pertinence and efficiency, easy implementation and simple calculation.
CN107797450AActive Publication Date: 2018-03-13BEIHANG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
BEIHANG UNIV
Publication Date
2018-03-13

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Abstract

The present invention relates to a complex coefficient method-based magnetic suspension flat rotor system nutation frequency analysis method. The method comprises the steps of according to the Euler kinematical equations, and by modeling and analyzing the magnetic suspension flat rotor system rotational dynamics, establishing the relation between the control system parameters and the rotating speed and the rotational motion, utilizing a complex coefficient method to represent a two-degree of freedom rotational kinetic equation as a single degree of freedom complex variable equation, establishing a damping vibration frequency characteristic equation by the variable reconstruction, according to the characteristic that a nutation mode is homodromous with the rotor rotating speed, obtaining the analysis relation between the nutation frequency and the control system parameters and the rotating speed. The method is simple to calculate and easy to realize, can calculate the nutation mode frequency under the decentralized PID control more accurately, and enables the control pertinence and efficiency of the nutation mode to be improved.
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Description

Technical field

[0001] The invention relates to the technical field of magnetic suspension flat rotor system control, in particular to a nutation frequency analysis method of a magnetic suspension flat rotor system based on a complex coefficient method, which can be used for the nutation frequency analysis calculation of a magnetic suspension flat rotor system under decentralized PID control conditions. Background technique

[0002] Magnetic bearing has many advantages such as no contact, no friction, no need for lubrication, long service life and so on. With the maturity of magnetic levitation control technology, it is widely used in magnetic levitation molecular pump, magnetic levitation energy storage flywheel, magnetic levitation control moment gyroscope, magnetic levitation high energy density Motors and other institutions. The magnetic bearing control system usually adopts decentralized PID control, but with the increase of the magnetic suspension rotor speed, the introduct...

Claims

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