General solution for the self-organizing, distributed, real-time scheduling of FMS-automatic lot-streaming using hybrid dynamical systems

János Somló, Imre J. Rudas

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The use of hybrid dynamical systems opens a new horizon for flexible manufacturing systems scheduling. It even makes possible directly connect scheduling and MRP. In the present paper the most important new result is the proposed demand rates determination method for multi-section scheduling problems. Some other important achievements making possible the application of this approach are discussed,too. These are, for example: feedback control law resulting in stable (implementable with finite buffers) and regular (converging to periodic) processes is described; optimal demand rates determination for single-section problems is discussed. In this paper the "buffer principle" of planning is used and a bottleneck scheduling approach is applied. As the result, production times close to the global minimum of net manufacturing time, determined by the loading characteristics of bottleneck machine-groups, may be realized. The proposed control is totally self-organizing. No outside control commands are necessary. Every buffer is only connected (in the signal level) with the previous and the next buffer. The actions are real-time controlled. The most important feature of this control is that it significantly improves the efficiency of utilization of system resources.The generalization for multi-section problems makes it possible to solve the most common application tasks. Ev, the solution of dynamical input problems becomes possible.

Original languageEnglish
Pages (from-to)155-180
Number of pages26
JournalActa Polytechnica Hungarica
Volume8
Issue number6
Publication statusPublished - Dec 1 2011

Keywords

  • Automatic lot-streaming
  • Bottleneck
  • Buffers
  • Distributed
  • Flexible manufacturing systems
  • Hybrid dynamical systems
  • Multi-sections
  • Optimal demand rates
  • Overlapping production
  • Periodic regimes
  • Real-time control
  • Scheduling
  • Scheduling and MRP
  • Self-organizing
  • Single-sections
  • Stability

ASJC Scopus subject areas

  • Engineering(all)

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