Simulation of Spindle Rotation Error with Three-Point Method Based on Matlab

2010 ◽  
Vol 156-157 ◽  
pp. 1069-1073
Author(s):  
Zou Ya Huang ◽  
Wei Qiang Gao ◽  
Qiu Sheng Yan ◽  
Jian Jian Huang ◽  
Chao Ting Qing
Keyword(s):  
Noise Signal ◽  
Point Method ◽  
Error Signal ◽  
Matlab Simulation ◽  
Angle Error ◽  
Roundness Error ◽  
Rotation Error ◽  
Error Magnitude ◽  
Spindle Rotation ◽  
Simulation Error

This paper establishes the simulation error data models of roundness error, spindle rotation error and noise signal from the characteristics of error signal based on three-point method. From the Matlab simulation, the influence of installation angle error of the sensor, roundness error magnitude and the noise on the segregation accuracy was studied in detail. This makes up the deficiencies of previous studies, and also provides a good foundation for further improving the accuracy of three-point method.

Four-point Method in the Measurement and Separation of Spindle Rotation Error

2020 ◽  
pp. 1-1
Author(s):  
Fei Liu ◽  
Lin Liang ◽  
Guanghua Xu ◽  
Chenggang Hou ◽  
Dan Liu
Keyword(s):  
Point Method ◽  
Rotation Error ◽  
Spindle Rotation

scholarly journals Prediction of Spindle Rotation Error through Vibration Signal based on Bi-LSTM Classification Network

2021 ◽  
Vol 1043 (4) ◽  
pp. 042033
Author(s):  
Jianhong Liang ◽  
Liping Wang ◽  
Jun Wu ◽  
Zhigui Liu ◽  
Guang Yu
Keyword(s):  
Vibration Signal ◽  
Rotation Error ◽  
Spindle Rotation

Direct compensation of the spindle rotation error with an active hydrostatic journal bearing system

2021 ◽  
pp. 095440622110263
Author(s):  
Chunwang Xu ◽  
Shujiang Chen ◽  
Changhou Lu ◽  
Kang Wang ◽  
Jiaheng Sun
Keyword(s):  
Journal Bearing ◽  
Machining Process ◽  
Machining Accuracy ◽  
Accuracy Improvement ◽  
Servo Valve ◽  
Rotation Error ◽  
Spindle Rotation ◽  
Direct Compensation ◽  
Simulation And Experiment ◽  
Bearing System

Spindle rotation accuracy is important in machining process. Indirect compensation of spindle rotation error has been widely adopted in the field of machining accuracy improvement. However, there are some limitations on indirect compensation, and a little research on direct compensation can be found. This article utilizes active lubrication technology to improve the spindle rotation accuracy. Hydrostatic journal bearing with control recesses and servo valve drove by piezoelectric ceramics are adopted to compose the compensation element. The simple control strategy PID is adopted to provide control signal for servo valve. Both simulation and experiment are designed and conducted. The results show that proposed bearing system has the ability to improve the spindle rotation accuracy.

Study on Harmonic Analysis and Error Correction in Synchro to Digital Conversion

2011 ◽  
Vol 225-226 ◽  
pp. 334-337 ◽  
Author(s):  
Yan Liu ◽  
Ze Gang Ye
Keyword(s):  
Harmonic Analysis ◽  
Error Correction ◽  
Measurement Method ◽  
Angle Measurement ◽  
Conversion Process ◽  
Matlab Simulation ◽  
Angle Error ◽  
Digital Conversion ◽  
Current Implementation ◽  
Improve Accuracy

The current implementation of the synchro to digital conversion (SDC) can not directly detect harmonic which can cause the problem of low precision angle measurement. To improve accuracy of angle, harmonic interference was analyzed and summarized in the axis-angle to digital conversion process. Through detailed research, a new angle measurement formula is proposed in this paper, this formula can be very good for angle error correction and compensation. In order to meet the practical requirements, a software measurement method based on FFT algorithm of harmonic analysis and error correction is put forward. Matlab simulation shows that the formula and method is effective and feasible.

scholarly journals Maximum voltage sag compensation using direct converter by modulating the carrier signal

2020 ◽  
Vol 10 (4) ◽  
pp. 3936
Author(s):  
S. Abdul Rahman ◽  
Gebrie Teshome
Keyword(s):  
Voltage Sag ◽  
Error Signal ◽  
Matlab Simulation ◽  
Simulation Results ◽  
Actual Amplitude ◽  
Series Transformer ◽  
Maximum Voltage

The aim of this paper is to achieve maximum voltage sag compensation of 52% using direct converter based DVR. The DVR topology has only two switches. The DVR is designed to compensate the voltage sag in a phase by taking power from the same phase. A direct converter is connected between the series transformer and the line in which sag compensation is to be achieved. If the actual amplitude of the error signal is used and the amplitude of carrier signal is kept at 1 unit, it is possible to achieve only 22% of sag compensation. If the amplitude of the carrier signal is modulated according to the percentage of existing sag, 52% of the sag is compensated through ordinary PWM technique with the THD less than 5%. Matlab Simulation results are presented for the validating the analysis.

Analysis of aerostatic spindle radial vibration error based on microscale nonlinear dynamic characteristics

2019 ◽  
Vol 25 (14) ◽  
pp. 2043-2052 ◽  
Author(s):  
Dongju Chen ◽  
Na Li ◽  
Ri Pan ◽  
Jihong Han
Keyword(s):  
Dynamic Model ◽  
Nonlinear Dynamic ◽  
Degrees Of Freedom ◽  
Dynamic Stiffness ◽  
Prediction Method ◽  
Rotor System ◽  
Rotation Error ◽  
Spindle Rotation ◽  
Microscale Effect ◽  
Aerostatic Spindle

This paper presents a method of predicting the radial rotary error of an aerostatic spindle based on the microscale-effect to investigate the influence of gas film fluctuation on the rotation accuracy of the aerostatic spindle. First, the gas bearing of the spindle is simplified as a spring-damping system with two degrees of freedom perpendicular to each other. Additionally, the aerostatic spindle bearing-rotor system is established by considering the forced vibration and deflection vibration of the rotor. Subsequently, the microscale-effect is introduced into the dynamic model of the gas film flow, and the dynamic Reynolds equation of the gas film is established in the microscale. Moreover, the nonlinear dynamic stiffness and dynamic damping coefficient are obtained by the perturbation method. The nonlinear dynamic parameters in the microscale are introduced into the dynamic model of the bearing-rotor system and all the vibration errors are obtained. By comparison with the conventional case, it is found that the spindle gyration error increased and that the response delay occurred when the microscale-effect is considered. Moreover, the influence of the supply pressure and speed on the vibration of the spindle is also analyzed. An experiment measuring the spindle rotation error is carried out. The experimental results reveal that the prediction method of the nonlinear spindle rotation error in the microscale is more accurate, and that the errors are 5.8% and 9.6%.

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