Accurate magnetic levitation bearing dynamic stiffness testing method

A technology of dynamic stiffness and test method, applied in the direction of elasticity test, machine/structural component test, measurement device, etc., can solve the problems of machine performance impact, small modal damping, low internal resistance, etc., to achieve convenient operation, Accurate results and mature means

Inactive Publication Date: 2015-07-22
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
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Problems solved by technology

[0003] Because many machines have flexible attachments, they can basically be simplified as a cantilever outrigger thin plate structure, but their internal resistance is very low, and the modal damping is small. If no measures are taken to suppress their vibration, once they are disturbed by the outside, they will Can have a significant impact on machine performance

Method used

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  • Accurate magnetic levitation bearing dynamic stiffness testing method
  • Accurate magnetic levitation bearing dynamic stiffness testing method
  • Accurate magnetic levitation bearing dynamic stiffness testing method

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Embodiment Construction

[0034] Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail:

[0035] Such as figure 1 The structure shown is an application scenario of the accurate test method for the dynamic stiffness of the magnetic suspension support disclosed in the present invention. The system includes a suspended object, a force hammer, an acceleration sensor, a magnetic suspension support system, a vibration signal analyzer and a PC computer.

[0036] The specific steps of the accurate test method for the dynamic stiffness of the magnetic suspension support in the system are as follows:

[0037] Step 1), setting an acceleration sensor on the magnetically permeable suspended object of the non-contact magnetic suspension support to collect its acceleration response signal, and connecting the acceleration sensor to an input channel of the vibration signal analyzer;

[0038] Step 2), set a force sensor on the hammer to collect the forc...

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Abstract

The invention discloses an accurate magnetic levitation bearing dynamic stiffness testing method. The numerical value expression of magnetic levitation bearing dynamic stiffness is accurately recognized through the comparison of finite element simulation calculation and the vibration test result, wherein a vibration test is one of a modal test and a frequency response test, and the comparison of calculation and the test result can be calculated through MatLab engineering software programming. By means of the method, the magnetic bearing stiffness expression under the stable magnetic levitation control can be obtained, and a useful research method and necessary test data are provided for the dynamic characteristics of a magnetic levitation bearing system.

Description

technical field [0001] The invention relates to the technical field of magnetic suspension control systems, in particular to a method for accurately testing the dynamic stiffness of a magnetic suspension support. Background technique [0002] Magnetic levitation support technology is a comprehensive technology involving many disciplines. It can detect the displacement of the rotor from the reference point through the sensor, and the microprocessor (PID control) as the controller converts the detected displacement into a control signal. Then the power amplifier amplifies the control signal and converts it into a control current, which generates a magnetic force in the actuator magnet so that the controlled object maintains its suspended position. Due to the advantages of no mechanical contact, no wear, no need for lubrication and sealing, and good dynamic characteristics of the support, the magnetic suspension support has made the application of this technology more and more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M5/00
Inventor 郭勤涛彭建康曹云丽
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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