Measurement and analysis of typical motion error traces from a circular test

2008 ◽  
Vol 3 (2) ◽  
pp. 146-150
Author(s):  
Xiaoli Li ◽  
Huanlao Liu
Keyword(s):  
Motion Error ◽  
Circular Test ◽  
Measurement And Analysis

Sensorless Simultaneous Rotary-Translational Axis Motion Error Measurement and Trace Based on Virtual Bar

2010 ◽  
Author(s):  
Yuqing Zhou ◽  
Xuesong Mei ◽  
Gedong Jiang ◽  
Nuogang Sun ◽  
Bai Shao
Keyword(s):  
Mathematical Model ◽  
Feature Extraction ◽  
Wavelet Transform ◽  
Machine Tool ◽  
Error Measurement ◽  
Error Source ◽  
Spatial Error ◽  
Motion Error ◽  
Circular Test ◽  
The Mathematical Model

Simultaneous rotary-translational (R-T) axis motion error has significant influence on multi-axis machine tool precision. To improve multi-axis machine tool precision, axis motion error measurement and trace method are investigated in this study. A sensorless R-T axis motion error measurement and trace technology based on virtual bar is proposed. Firstly, the fundamental sensorless test principle is discussed. Then, the virtual-bar-based test path of a circular test though a rotary axis and two translational axes motion is scheduled. The mathematical model of motion error is established. Furthermore, to identify the error source, spatial error charts and some advanced signal processing and feature extraction technologies, such as wavelet transform and frequency analysis, are used. The analysis of experimental results shows that it is practical and efficient to use the virtual bar and the sensorless information to estimate motion error.

scholarly journals Measurement and analysis of the radial motion error of aerostatic ultra-precision spindle

Measurement ◽  
2019 ◽  
Vol 137 ◽  
pp. 624-635 ◽  
Author(s):  
Hailong Cui ◽  
Dajiang Lei ◽  
Xinjiang Zhang ◽  
He Lan ◽  
Zhengyi Jiang ◽  
...  
Keyword(s):  
Radial Motion ◽  
Motion Error ◽  
Measurement And Analysis ◽  
Ultra Precision

Effects of Rotation Angle on the Circular Test of Geometric Errors

2005 ◽  
Vol 295-296 ◽  
pp. 289-294
Author(s):  
H.L. Liu
Keyword(s):  
Error Compensation ◽  
Motion Error ◽  
Angle Deviation ◽  
Circular Test ◽  
Nc Machine ◽  
Nc Machine Tools ◽  
Effects Of Rotation ◽  
Special Points ◽  
Dimensional Ball ◽  
Deviation Problem

DBB was originally manufactured and proposed for checking the accuracy of NC machine tools. The device can also be used to study the relations between motion error of trace and the machine motion error for the purpose of error compensation. The nominal angle obtained through rotation feed rate and sampling time was adopted instead of actual angle which cannot be measured by the device. This project examined in details the effect of the angle deviation problem caused by non-perpendicularity between the movements in axis X and axis Y. The analysis and calculation verified that a squareness deviation would lead to more than 3 times error at some special points, decreasing the accuracy of NC machines for error compensation. For this reason, a device called as Two-Dimensional Ball Bar is proposed based on the DBB.

Sistem Kontrol Optimal Fuzzy-Particle Swarm Optimization

2018 ◽  
Vol 9 (1) ◽  
pp. 1-5
Author(s):  
Fachrudin Hunaini ◽  
Imam Robandi ◽  
Nyoman Sutantra
Keyword(s):  
Fuzzy Logic ◽  
Particle Swarm Optimization ◽  
Control System ◽  
Membership Function ◽  
Fuzzy Logic Control ◽  
Particle Swarm ◽  
Optimization Method ◽  
Swarm Optimization ◽  
Motion Error ◽  
Logic Control

Fuzzy Logic Control (FLC) is a reliable control system for controlling nonlinear systems, but to obtain optimal fuzzy logic control results, optimal Membership Function parameters are needed. Therefore in this paper Particle Swarm Optimization (PSO) is used as a fast and accurate optimization method to determine Membership Function parameters. The optimal control system simulation is carried out on the automatic steering system of the vehicle model and the results obtained are the vehicle's lateral motion error can be minimized so that the movement of the vehicle can always be maintained on the expected trajectory

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