Modeling and control of SMT manufacturing lines using hybrid dynamic systems

  • Authors:

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

  • Affiliations:

  • Georgia Institute of Technology, Electrical and Computer Engineering, Center for Board Assembly Research, Atlanta, GA;Georgia Institute of Technology, Textile and Fibre Engineering, Atlanta, GA;Georgia Institute of Technology, Textile and Fibre Engineering, Atlanta, GA;Georgia Institute of Technology, Electrical and Computer Engineering, Center for Board Assembly Research, Atlanta, GA;Georgia Institute of Technology, Electrical and Computer Engineering, Center for Board Assembly Research, Atlanta, GA;Georgia Institute of Technology, Electrical and Computer Engineering, Center for Board Assembly Research, Atlanta, GA

  • Venue:
  • HSCC'03 Proceedings of the 6th international conference on Hybrid systems: computation and control
  • Year:
  • 2003

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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.