Control method of unbalanced motion of magnetic suspension bearing rotor based on phase stabilization

A magnetic levitation bearing and rotor unbalanced technology, applied in the direction of anti-centrifugal force rotating parts, bearings, shafts and bearings, can solve problems such as system failures and system dynamic performance indicators

Active Publication Date: 2019-08-20
HARBIN ENG UNIV
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Problems solved by technology

This unbalanced vibration has a great influence on the dynamic performance index of the system. If the range of vibration exceeds the maximum range, it will cause system failure.

Method used

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  • Control method of unbalanced motion of magnetic suspension bearing rotor based on phase stabilization
  • Control method of unbalanced motion of magnetic suspension bearing rotor based on phase stabilization
  • Control method of unbalanced motion of magnetic suspension bearing rotor based on phase stabilization

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] Since the displacement signal detected by the sensor is mixed with a disturbing signal, the electromagnetic force generated by the control current cannot make the rotor move around the shaft. produce unbalanced vibrations. This unbalanced vibration has a great influence on the dynamic performance index of the system, and the range of vibration exceeds the maximum range, which will cause system failure. Aiming at this disturbance signal, the present invention designs a phase-stable control method to reduce its influence on the system controller. combine Figure 1 to Figure 5 , the steps of the present invention are as follows:

[0032] Step S1: Establish the magnetic suspension bearing rotor system coordinate system, establish the x and y axes in the radial direction of the magnetic suspension bearing, and the z axis in the a...

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Abstract

The invention provides a control method of the unbalanced motion of a magnetic suspension bearing rotor based on phase stabilization. The control method comprises the steps of (S1) establishing a coordinate system of a magnetic suspension bearing rotor system, and establishing x and y axes in the radial direction of magnetic suspension and a z axis in the axial direction of magnetic suspension; (S2) establishing a four-degree-of-freedom kinematic model of the radial direction of the magnetic suspension bearing rotor; (S3) determining the number and position of position sensors according to theappearance and shape of a bearing, and establishing a displacement sensor model; (S4) establishing a power amplifier model; (S5) establishing a kinematic model of the magnetic suspension rotor; and (S6) restraining the unbalanced vibration of the rotor by utilizing a phase stabilization control method. According to the phase stabilization control method provided by the invention, the influence ofthe unbalanced vibration generated when the rotor rotates on a controller is effectively solved. According to the phase stabilization control method provided by the invention, the traditional influence of an automatic balance system and phase-change peak gain on the switching between high speed and low speed is effectively solved.

Description

technical field [0001] The invention relates to a method for controlling unbalanced motion of a magnetic suspension bearing rotor based on phase stability, and belongs to the field of magnetic suspension bearing control. Background technique [0002] The magnetic levitation support technology is to use the electromagnetic force to suspend the magnetic levitation rotor in space, and use the motor to drive the rotor to move around the circumference. This technology is widely used in mechanical processing, transportation facilities construction, national defense and other fields because of its advantages of environmental protection, no friction loss, and no need for lubrication. The current magnetic suspension bearing system uses sensors to collect the displacement of the bearing and sends it to the controller for processing, thereby making the magnetic suspension bearing stable. However, during the high-speed rotation of the rotor around the axis, the quality of the rotor is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C32/04
CPCF16C32/0451F16C2233/00
Inventor 丁福光刘冲张晓云赵大威杨闳凯刘向波刘建旭陈兴华
Owner HARBIN ENG UNIV
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