<abstract xmlns="http://www.w3.org/1999/xhtml"><p>A novel fuzzy controller is proposed here to improve the positioning precision of servo system of CNC lathes. To utilize the high–accuracy potential of the VUD fuzzy controller, a grating–ruler was used as a sensor to measure the displacement of work pieces. Designing the VUD fuzzy controller involved five steps, i.e., setting up universes of discourse and parameters, selecting membership functions, designing a differential circuit, constructing a base of fuzzy rules, and defining a set of contraction-expansion factors. The method of lookup table was applied to construct the base of fuzzy rules via four typical input instructions, and the method of maximum strength to settle the conflicting rules properly. The experimental results show that the VUD fuzzy controller can be effective in controlling the position of work pieces.</p></abstract>

A novel fuzzy controller is proposed here to improve the positioning precision of servo system of CNC lathes. To utilize the high–accuracy potential of the VUD fuzzy controller, a grating–ruler was used as a sensor to measure the displacement of work pieces. Designing the VUD fuzzy controller involved five steps, i.e., setting up universes of discourse and parameters, selecting membership functions, designing a differential circuit, constructing a base of fuzzy rules, and defining a set of contraction-expansion factors. The method of lookup table was applied to construct the base of fuzzy rules via four typical input instructions, and the method of maximum strength to settle the conflicting rules properly. The experimental results show that the VUD fuzzy controller can be effective in controlling the position of work pieces.

High-Accuracy Positioning Of Lathe Servo System Using Fuzzy Controllers Based On Variable Universe Of Discourse

International Journal on Smart Sensing and Intelligent Systems

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

A novel fuzzy controller is proposed here to improve the positioning precision of servo system of CNC lathes. To utilize the high–accuracy potential of the VUD...

High-Accuracy Positioning Of Lathe Servo System Using Fuzzy Controllers Based On Variable Universe Of Discourse

Published Online: Sep 01, 2014

Page range: 114 - 1133

Received: Jan 05, 2014

Accepted: Sep 01, 2014

DOI: https://doi.org/10.21307/ijssis-2017-697

Keywords
servo system, positioning of work pieces, CNC-lathe, fuzzy controller, fuzzy system, variable universe of discourse, contraction–expansion factor, approximation error

© 2014 Zuqiang Long et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

High-Accuracy Positioning Of Lathe Servo System Using Fuzzy Controllers Based On Variable Universe Of Discourse

Published Online: Sep 01, 2014

Page range: 114 - 1133

Received: Jan 05, 2014

Accepted: Sep 01, 2014

DOI: https://doi.org/10.21307/ijssis-2017-697

Keywordsservo system, positioning of work pieces, CNC-lathe, fuzzy controller, fuzzy system, variable universe of discourse, contraction–expansion factor, approximation error

© 2014 Zuqiang Long et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
servo system, positioning of work pieces, CNC-lathe, fuzzy controller, fuzzy system, variable universe of discourse, contraction–expansion factor, approximation error