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Sensor noise signal inhibition method in three-point-method rotation error separation process

A technology of sensor noise and rotation error, which is applied in the field of sensor noise signal suppression in the process of three-point method rotation error separation, and can solve the problems of affecting the error separation result and the amplification of negative effects of noise interference signals, etc.

Active Publication Date: 2016-07-20
XIDIAN UNIV
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Problems solved by technology

[0003] Due to the interference of complex working conditions and strong electromagnetic factors on the industrial site, noise interference signals with complex frequency components are often mixed into the sensor signal, and harmonic suppression is prone to occur in the data processing link of the three-point method. If it is not handled properly, noise interference The negative effect of the signal will be amplified, directly affecting the final error separation result

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  • Sensor noise signal inhibition method in three-point-method rotation error separation process
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  • Sensor noise signal inhibition method in three-point-method rotation error separation process

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Embodiment Construction

[0053] The process of the present invention is as follows figure 1 As shown, the embodiments of the present invention are described in detail below in conjunction with the accompanying drawings:

[0054] 1. Construction of optimization objective function

[0055] Arrange i probes S along the test reference circle i (i=1, 2, 3), the angle between each sensor probe and the x-axis is The frequency domain expression of the combined signal of the sensor in the three-point method after the interference of the noise signal δ is established:

[0056]

[0057] Among them, n is the frequency domain discrete value serial number, and n=0,1,2,...,N-1; N is the number of sampling points; R(ω n ) is the frequency domain expression of the test section profile signal r(kΔθ), ∏(ω n ) is the frequency domain representation of the noise signal δ.

[0058] The error between the rotor contour signal r'(kΔθ) and the rotor real contour signal r(kΔθ) obtained by separation after being aff...

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Abstract

The invention provides a sensor noise signal inhibition method in a three-point-method rotation error separation process. The method comprises steps that firstly, a sensor mounting angle is reasonably designed to carry out signal acquisition, and a sensor combination signal frequency domain expression in a three point method after noise signal interference is constructed; secondly, an error model of a real rotor contour signal and a contour signal acquired through separation after noise interference is established, and a transfer function of a noise signal in a separation process is acquired through analysis; lastly, an optimization target function is constructed according to the acquired transfer function, a harmony search algorithm based on coordinate rotation is further utilized to carry out optimization solution. According to the method, a sensor noise signal inhibition problem in the three-point-method rotation error separation process is converted into a target function optimization problem, each-order frequency components of the noise signal are effectively inhibited through optimizing the transfer function of the noise signal, and rotation error separation precision is improved.

Description

technical field [0001] The invention belongs to the technical field of sensor noise processing, and in particular relates to a method for suppressing sensor noise signals in the separation process of three-point rotation error. The test accuracy of the signal has a good application prospect in the field of noise processing in industrial production. Background technique [0002] Error Separation Technology (ErrorSeparationTechnique) aims to separate the roundness profile error and the rotation error of the measured object from the radial runout. The multi-point method can test the spindle rotation error without affecting the machining of the machine tool spindle. After the sensor is installed once, it does not need to be adjusted again, and it is easy to realize automatic processing, which is suitable for the integration of modern monitoring systems. At present, the most widely used and most mature multi-point method error separation system adopts three sensors, namely the s...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B21/20
CPCG01B21/20
Inventor 章云魏乔张文波
Owner XIDIAN UNIV
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