e-journal
Design of a Decentralized Controller for a Glass RTP System
Abstract
The design of a decentralized controller has been studied as an integral part of the development of a commercial rapid thermal processing (RTP) system for manufacturing display glass. The glass RTP system uses bulb-type tungsten-halogen lamps for heating. A highly uniform temperature distribution with a maximum temperature difference of less than 6 ◦C between any two points is required during glass processing, regardless of the size of the glass. In designing a decentralized controller that satisfies this requirement, the problems of optimal sensor location, lamp grouping, optimization-based controller
tuning, and time-varying bias input signals were identified and solved. The performance of the controller was investigated experimentally and numerically.
Index Terms—Glass RTP, decentralized control, optimal sensor locations, input grouping, iterative learning control (ILC).
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