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A Stability Control Method for Magnetically Suspended Flexible Rotor Based on Optimal Damping Principle

A stable control method and flexible rotor technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve the problems of complex algorithm, excessive dependence on the accuracy of the system model, and high controller order, and achieve the control algorithm Simple, improve control efficiency, reduce the effect of order

Active Publication Date: 2021-07-23
BEIHANG UNIV
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the prior art method has the following disadvantages: (1) usually the controller has a higher order and needs to build a state observer
(2) Too much dependence on the accuracy of the system model, and the algorithm is complex

Method used

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  • A Stability Control Method for Magnetically Suspended Flexible Rotor Based on Optimal Damping Principle
  • A Stability Control Method for Magnetically Suspended Flexible Rotor Based on Optimal Damping Principle
  • A Stability Control Method for Magnetically Suspended Flexible Rotor Based on Optimal Damping Principle

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Embodiment Construction

[0091] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0092] Take the 400kW maglev flexible rotor system as an example, such as figure 1 As shown, the system mainly includes (from left to right): balance plate, left radial displacement sensor, radial magnetic bearing (A), high-speed motor, rotor carbon fiber protection layer, radial magnetic bearing (B), right radial Displacement sensors, axial magnetic bearings and axial displacement sensors. Such as figure 2 As shown, the flexible rotor is regarded as an elastic system composed of a finite number of units whose mass is continuously distributed, and each mass unit is equivalent to a node along the axis, so that the entire rotor is equivalent to an elastic system composed of 88 nodes, The 88 equivalent nodes are divided into two parts according to the different force modes of the axial mass unit of the rotor: nodes at the magnetic bearing support and ...

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Abstract

The invention discloses a method for stabilizing a magnetic suspension flexible rotor based on an optimal damping principle. The method includes: firstly establishing the dynamic model of the magnetic levitation flexible rotor system through finite element analysis, and then analyzing the unbalanced response of the model to obtain the transfer function of the flexible rotor system, and then analyzing the magnetic bearing control system to obtain the optimum at the first-order flexible mode. The condition of optimal damping is obtained, and the phase compensation controller is designed to compensate the damping of the control system to the optimal value, so as to realize the stable control of the flexible rotor system in the first-order flexible mode. The invention can make full use of the limited electromagnetic force of the magnetic bearing, and is especially suitable for the stable control of the first-order critical speed of the magnetic suspension flexible rotor.

Description

technical field [0001] The invention relates to the technical field of magnetic levitation rotor control, in particular to a method for stabilizing a magnetic levitation flexible rotor based on an optimal damping principle, which is used for the stable control of a magnetic levitation flexible rotor system passing the first-order critical speed. Background technique [0002] The magnetic levitation rotor is an important part of the rotating machinery system. With the development of industry, there is a major demand for high efficiency and high energy density on the rotating machinery, which requires the magnetic levitation rotor to develop in the direction of thinner, longer, and higher speed. The rotor works at Above one or more critical speeds, the rotor becomes flexible, and the flexible rotor will resonate in the flex mode, which can easily cause the rotor to touch the protective bearing and cause the rotor to become unstable, which directly affects the life and work of t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 汤继强宁梦月孙津济郑世强余世城王浩安
Owner BEIHANG UNIV
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