Intelligence control of on-line dynamic gray cloth inspecting machine system module design. I. Tension controller design |
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| Authors: | Chung-Feng Jeffrey Kuo Chia-Der Chang Te-Li Su Chun-Hui Lee |
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| Institution: | (1) Graduate Institute of Automation and Control, National Taiwan University of Science and Technology, Taipei, 106, Taiwan, Republic of China;(2) Department of Electrical Engineering, MingChi University of Technology, Taipei, 243, Taiwan, Republic of China;(3) Department of Polymer Engineering, National Taiwan University of Science and Technology, Taipei, 106, Taiwan, Republic of China |
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| Abstract: | Tension is very closely related with fabric inspection quality, as not well controlled tension of gray cloth will lead to
stretch, relax or fold of gray cloth, so that no sharpest image can be taken. Now that gray cloth tension and convey speed
are related with taking sharp image, so this study attempts to design a gray cloth tension control module, develop the intelligent
online dynamic gray cloth defect automatic detection system. Gray cloth tension control module makes direct regulation of
structural tension of feed and wind rolls and conveys speed control module by load cell coupled with A/D, D/A signal conversion
and two sets of inverters. This study utilized fuzzy control theory to design controller so as to keep surface tension consistency
of gray cloth, improve recognition rate of gray cloth defect, so that the system can have high action efficiency. In previous
fuzzy controller designs, membership functions were often designed by means of trial-and-error method, which usually cost
much time. This study used Taguchi method to make membership function programming, and made main effect analysis to choose
a group of optimal membership function combination. Through systematized, efficient experimental design, tension controller
designed in this study could stabilize gray cloth tension very soon, and acquire sharp gray cloth image. |
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| Keywords: | Dynamic gray cloth inspecting system Tension control Fuzzy theory Taguchi method Analysis of variance |
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