Method for deciding radial rotation stability of magnetic suspension rotor system

Abstract

A method for judging magnetic suspension rotor system stability, includes through establishing magnetic suspension rotor system radial rotational motion dynamics differential equation model, adopting plurality conversion converting real coefficient two variable equation to complex system monovariant form, to obtain monovariant equivalent system, then drawing open loop transfer function dual frequency Bode chart of equifinality complex system, utilizing generalized classic frequency field stability criteria judging rotor precession and nutation stability, providing require condition for designing raising system stability correction link. The present invention converts multivariable system to equifinality monovariant system, thereby capable of using classical monovariant control theory to proceed stability analysis, relative usual multivariable method such as state space analysis method etc, not only very visual but also having good robustness, thus more fitting real system application.

Description

Technical field [0001] The invention relates to a method for determining the stability of a magnetic suspension rotor system, which can be used for the stability analysis of the radial rotation mode of the magnetic suspension rotor system and judge whether the precession and nutation of the magnetic suspension rotor are stable. Background technique [0002] Compared with traditional mechanical ball bearings, magnetic bearings have outstanding advantages such as non-contact, active controllability of stiffness and damping, so there is no friction and wear, and no lubrication, allowing the rotor to rotate at a high speed, low vibration, and high supporting accuracy. It is especially suitable for super Clean environment equipment, high-speed equipment and aerospace equipment requiring low vibration, high precision and long life. At present, magnetic bearing-based magnetic levitation rotor systems have been increasingly widely used in spacecraft attitude control actuators such as cen...

AI Technical Summary

Problems solved by technology

However, the state-space method relies too much on the system model and mathematical analysis, does not have the intuitiveness and robustness of classical control theory, and is not convenient for practical application

For the maglev rotor system with weak gyro coupling, the gyro coupling can be neglected and the classical single variable control theory can be used for approximate analysis, but this approximate processing method is not suitable for the maglev rotor system with strong gyro coupling effect

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