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Multi-model Robust and Non-disturbance Switching Control Method for Magnetic Suspension Bearing

A magnetic suspension bearing and disturbance-free switching technology, which is applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve instability and other problems, and achieve the effect of improving performance and stability, and high computing efficiency

Active Publication Date: 2019-12-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Purpose of the invention: the single robust control designed for a single model in the present invention faces many challenges in practice due to its large conservatism; while there are shortcomings of instability and chattering in the process of switching between multi-model and multi-controller , a multi-model robust non-disturbance switching control method for magnetic suspension bearings is proposed, which can effectively solve the instability and chattering phenomena in the switching process of different controllers

Method used

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  • Multi-model Robust and Non-disturbance Switching Control Method for Magnetic Suspension Bearing
  • Multi-model Robust and Non-disturbance Switching Control Method for Magnetic Suspension Bearing
  • Multi-model Robust and Non-disturbance Switching Control Method for Magnetic Suspension Bearing

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Embodiment 1

[0112] (1) In the suspension state, the supporting electromagnetic force provided by the magnetic suspension bearing is modeled as reflecting the current stiffness and displacement stiffness of the electronic control system, and the transfer function G of the flexible rotor of the magnetic suspension bearing is established amb .

[0113] (2) Based on the test frequency characteristics, the transfer function of the mechatronics model of the flexible rotor magnetic suspension bearing is obtained:

[0114] G(s)=G amb (s)G s (s)G a (s)G D (s)

[0115] (2) Taking the speed as a variable, in the range of 0-3000rpm and 3000-6000rpm, based on the interval uncertainty measurement method, the uncertainty of the mechatronics model of the flexible rotor magnetic suspension bearing is calculated in the corresponding speed range.

[0116] (3) Based on the mathematical model and uncertainty of the controlled system in the two working speed ranges, respectively design the controller 1 su...

Embodiment 2

[0122] (1) In the suspension state, the supporting electromagnetic force provided by the magnetic suspension bearing is modeled as reflecting the current stiffness and displacement stiffness of the electronic control system, and the transfer function G of the flexible rotor of the magnetic suspension bearing is established amb .

[0123] (2) Based on the test frequency characteristics, the transfer function of the mechatronics model of the flexible rotor magnetic suspension bearing is obtained:

[0124] G(s)=G amb (s)G s (s)G a (s)G D (s)

[0125] (2) Taking the speed as a variable, in the range of 0-6000rpm and 6000-9000rpm, based on the interval uncertainty measurement method, the uncertainty of the mechatronics model of the flexible rotor magnetic suspension bearing in the corresponding speed range is calculated respectively.

[0126] (3) Based on the mathematical model and uncertainty of the controlled system in the two working speed ranges, respectively design the co...

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Abstract

The invention discloses a magnetic suspension bearing multi-model robust undisturbed switching control method, which comprises the following three steps: 1) interval uncertainty measurement, which isused for obtaining uncertainty mapping measurement values in rotation speed ranges; 2) design of an interval robust controller, which is used for designing a robust controller under different rotationspeeds based on robust control theory according to the obtained uncertainty mapping measurement values in different rotation speed ranges, and converting the robust controller into a state-space equation expression; and 3) undisturbed switching control based on a switching control device. The magnetic suspension bearing multi-model robust undisturbed switching control method can effectively eliminate instability and chattering phenomena in the switching process of different controllers.

Description

technical field [0001] The invention discloses a multi-model robust non-disturbance switching control method for a magnetic suspension bearing, which belongs to the technical field of magnetic suspension bearings. Background technique [0002] With the development of magnetic suspension bearing rotating machinery in the direction of high speed, light structure, large span and flexibility, the magnetic suspension bearing rotating machinery has higher and higher requirements for the performance index of the whole machine. As its core supporting component, the working speed of the magnetic suspension bearing needs to change within the range of several thousand to hundreds of thousands of revolutions per minute. Therefore, during the entire speed-up and speed-down process, the rotor system has to span several modal frequencies, the influence of the gyro torque increases with the increase of the speed, and the dynamic characteristics of the rotor system change sharply in the proc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 徐园平周瑾金超武
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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