Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for counteracting co-frequency interference of magnetic suspension bearing rotor control system

A technology for magnetic suspension bearings and co-frequency interference, applied in general control systems, control/regulation systems, bearings, etc., can solve problems such as mass imbalance, non-coincidence, and processing errors, and achieve offset co-frequency interference signals with simple structure , easy-to-achieve effects

Active Publication Date: 2022-05-27
NANJING TECH UNIV
View PDF22 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In practical applications, factors such as uneven rotor material and processing technology errors often lead to mass imbalance (the phenomenon that the center of the geometric axis of the rotor and the center of the inertial axis do not coincide)

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for counteracting co-frequency interference of magnetic suspension bearing rotor control system
  • A method for counteracting co-frequency interference of magnetic suspension bearing rotor control system
  • A method for counteracting co-frequency interference of magnetic suspension bearing rotor control system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] Since the interference signal is proportional to the square of the rotational speed, and the rotational speed is not fixed in the actual rotor system, the cancellation of the interference signal is more challenging for practical engineering. Therefore, the present invention mainly aims at the problem of canceling the interference signal of the magnetic suspension bearing rotor system in the whole range from the zero speed to the rated speed and then to the zero speed. The structure and parameters of the interference observer, as well as the structure of the thrust reverser controller and its corresponding parameters, the control system for co-frequency interference cancellation designed by the present invention has a simple structure and is easy to implement. Therefore, the method can effectively cancel the operation of the magnetic suspension rotor. co-channel interference signals in the process. In this embodiment, the interference signal estimated based on the interf...

Embodiment 2

[0139] refer to Figures 4 to 5 It is another embodiment of the present invention. In order to verify the technical effect adopted in this method, this embodiment adopts the traditional technical solution and the method of the present invention to carry out a comparative test, and compares the test results by means of scientific demonstration to verify that the method has real effect.

[0140] According to the steps of Embodiment 1, the disturbance observer is used to work together with the thrust reverser controller that stably suspends the magnetic levitation rotor. Figure 4 and Figure 5 It can be seen from the displacement response curve of the rotor that this method can offset the co-frequency interference of the rotor from the zero speed to the rated speed and then to the zero speed range. Figure 4 Indicates that the displacement response curve of the rotor of the magnetic suspension bearing under the traditional method under the reverse thrust controller has a relat...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a method for counteracting the same-frequency interference of a magnetic suspension bearing rotor control system, which includes: applying the same-frequency interference to the magnetic suspension bearing rotor, using the magnetic suspension bearing rotor system to feed back the output displacement signal to the reverse thrust controller, and outputting The control current signal after being affected by the same frequency interference; the displacement signal and the control current signal are used as the input of the interference observer; according to the difference between the interference signal in the displacement signal and the cut-off frequency of the control current signal, the interference signal is passed through a low-pass filter , using the signal observed by the interference observer to offset the actual interference signal to offset the same-frequency interference force. According to the different cut-off frequencies of the same-frequency interference signal and the control signal, the present invention passes the interference signal through a low-pass filter, and offsets the interference signal of the maglev rotor system from the signal measured by the interference observer in real time, thereby offsetting the same-frequency interference force. Counteract the same-frequency interference force of the rotor from zero speed to constant speed, and then to zero speed range.

Description

technical field [0001] The invention relates to the technical field of co-frequency interference cancellation of an active magnetic suspension bearing control system, in particular to a method for canceling co-frequency interference of a magnetic suspension bearing rotor control system. Background technique [0002] Active magnetic bearing, referred to as magnetic bearing, has the advantages of non-contact support, no lubrication, adjustable stiffness and damping, etc., and has been widely used in flywheel energy storage systems, aerospace, smart grid and other fields. In practical applications, factors such as the uneven rotor material and the error of the machining process often lead to the phenomenon of mass unbalance (the center of the geometric axis of the rotor and the center of the inertia axis do not coincide). When the rotor rotates at a high speed, it usually generates a co-frequency interference force with the same frequency as the rotation speed, which makes the ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04F16C32/04
CPCG05B13/042F16C32/0451
Inventor 张广明张林
Owner NANJING TECH UNIV