Magnetic suspension rotor cross feedback complete decoupling control method

Abstract

The invention relates to a magnetic suspension rotor cross feedback complete decoupling control method. A strong coupling phenomenon existing in two-degree-of-freedom deflection of a rotor is analyzed according to a rotor kinetic model, a complete decoupling control method of cross feedback is provided, firstly, the deflection cross coupling amount of the magnetic suspension rotor is solved according to a rotor kinetic equation, and then a controller and a cross feedback controller are designed; and finally, solving the matrixes of the controller and the rotor dynamical model, so that when the matrixes are diagonal matrixes, the complete decoupling of the two-degree-of-freedom deflection channel of the magnetic suspension rotor can be met. According to the method, the defect that complete decoupling cannot be achieved through a traditional decoupling algorithm is overcome, deflection decoupling control of the magnetic suspension rotor is not affected by the controller, the controller can be flexibly selected to achieve complete decoupling of the deflection channel of the magnetic suspension rotor, and a new control method is provided for complete decoupling of the deflection channel of the magnetic suspension rotor. The invention belongs to the field of magnetic suspension rotor control, and can be applied to complete decoupling control of two-degree-of-freedom deflection of a magnetic suspension rotor.

Description

technical field [0001] The invention relates to a cross-feedback complete decoupling control method for a magnetic levitation rotor, which is suitable for completely decoupling and stable control of the deflection degree of freedom of a high-speed rotor under the condition that the magnetic levitation rotor is unstable due to a strong coupling effect. [0002] technical background [0003] Magnetic bearing technology has been widely used in aerospace, industrial control and other fields due to its advantages of high speed, active control, no friction, long life, adjustable stiffness and damping. Inertial actuators using magnetic bearing technology have become a research hotspot. [0004] Magnetic bearings commonly used in industry are mainly used to support the rotating shaft, the moment of inertia ratio of the rotating shaft is relatively small, and the gyro coupling is not obvious. Different from the magnetic bearings used in industry, the magnetic levitation inertial actu...

AI Technical Summary

Problems solved by technology

[0006] The problem solved by the technology of the present invention is: the high-speed rotating magnetic levitation rotor has a strong coupling effect. The strong coupling of the magnetic levitation rotor will cause the magnetic levitation rotor to produce a gyro effect, destroy the stability of the rotor system, and cause the high-speed rotating rotor to collide with the protective bearing, resulting in irreversible The invention proposes a complete decoupling control method for the deflection degree of freedom of the maglev rotor with cross feedback. Firstly, the cross-coupling amount of the deflection of the maglev rotor is solved according to the rotor dynamics equation, and then the controller and the cross controller are designed. Finally, by solving the control The matrix of the rotor and the rotor dynamics model, when the matrix is ​​a diagonal matrix, can satisfy the complete decoupling of the maglev rotor deflection channel. This method overcomes the shortcomings of the traditional decoupling algorithm that cannot be completely decoupled, and can flexibly select the The device realizes the complete decoupling of the deflection channel of the magnetic levitation rotor, which can be applied to the control of the magnetic levitation rotor with strong coupling effect

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