Gap control for a proportional floating vacuum pad
| Autor: | C-Y Chen, J-C Renn, C-H Lu |
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| Rok vydání: | 2008 |
| Předmět: | |
| Zdroj: | Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science. 222:2069-2076 |
| ISSN: | 2041-2983 0954-4062 |
| DOI: | 10.1243/09544062jmes1079 |
| Popis: | In this article, a new proportional pneumatic floating vacuum pad is developed and constructed. There are two features concerning this new vacuum pad. The first is the inclusion of a proportional solenoid, which enables the continuously variable control of the suction force output. The floating mechanism design between the vacuum pad and the work-piece is the second feature, which is more preferable in real industries because it can protect the surface of the work-piece from scratches or other damage. Moreover, in addition to the open-loop gap control mode, two closed-loop gap control schemes are proposed in this paper. The first is the constant gap control. A preset gap is input to the controller as the command input that further drives the proportional solenoid to maintain a steady-state gap between the vacuum pad and the work-piece. In the second control approach, the gap between the vacuum pad and the work-piece is kept as large as possible to minimize the energy consumption. Both closed-loop control schemes are successfully implemented in this study. |
| Databáze: | OpenAIRE |
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