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Modeling and Control of SMT Manufacturing Lines Using Hybrid Dynamic Systems.

Barajas, L.G.; Kansal, A.; Saxena, A.; Egerstedt, M.; Goldstein, A.; Kamen, E.W.

In: Hybrid Systems: Computation and Control (HSCC 2003), Proceedings of the 6th International Workshop, Prague, Czech Republic, April 3-5, 2003., pages 66-80. Volume 2623 of Lecture Notes in Computer Science / O. Maler, A. Pnueli (Eds.) --- Springer Verlag, March 2003.

Abstract: In this paper we show how hybrid control and modeling techniques can be put to work for solving a problem of industrial relevance in Surface Mount Technology (SMT) manufacturing. In particular, by closing the loop over the stencil printing process, we obtain a robust system that can recover from faulty initial settings, adapt to environmental changes and unscheduled interrupts, and remove discrepancies associated with bidirectional printing machines. Moreover, a timed Petri net argument is invoked for bounding the control effort in such a way that the throughput of the system is unaffected by the introduction of the closed-loop controller. The soundness of the approach is verified on a real SMT manufacturing line.

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