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Computation of supervisors for reconfigurable machine tools
Date
2012-01-01
Author
Schmidt, Klaus Verner
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The rapid reconfiguration of manufacturing systems is an important issue in today's manufacturing technology in order to adjust the production to varying product demands and types. In this paper, we study the control of reconfigurable machine tools (RMTs) with the aim of fast reconfiguration and an easy controller implementation. We first formulate a particular reconfiguration problem for RMTs in a discrete event system setting, and then provide necessary and sufficient conditions for its solution. Moreover, we propose an algorithm for the construction of a reconfiguration supervisor as the composition of one supervisor for each separate RMT configuration and one supervisor that performs the transition between configurations. The reconfiguration supervisor can be computed in polynomial time, and allows configuration changes within a bounded delay. In addition, our method facilitates the addition of a new configuration during system operation.
Subject Keywords
reconfigurable machine
,
Discrete event systems
,
Toolssupervisory control
URI
https://hdl.handle.net/11511/35631
DOI
https://doi.org/10.3182/20121003-3-mx-4033.00038
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Department of Electrical and Electronics Engineering, Conference / Seminar
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The rapid reconfiguration of manufacturing systems is an important issue in today's manufacturing technology in order to adjust the production to varying product demands and types. In this paper, we study the control of reconfigurable machine tools (RMTs) with the aim of fast reconfiguration and an easy controller implementation. We first formulate a particular reconfiguration problem for RMTs in a discrete event system setting, and then provide a necessary and sufficient condition for its solution. Moreove...
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Reconfigurable manufacturing systems (RMS) were introduced as a new manufacturing concept for rapidly adjusting the production capacity and functionality of manufacturing systems. Hereby, the control of RMS requires realizing each desired configuration and changing between configurations on request, whereby a suitable design approach should scale to large-scale systems. In this thesis, we develop a controller design method for RMS that supports modular design and is scalable to RMS of large size. As the f...
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Chatter in high speed machining is an important problem which affects the product quality and the manufacturing time. In order to determine the optimum cutting parameters such as depth of cut, feed rate, spinning speed etc., dynamic characteristics of the spindle-holder-tool assembly should be modeled accurately. To determine optimum depth of cut and operating speed, frequency response function (FRF) of the tool point is required. However, in high speed machining, due to high rotational speeds, dynamic char...
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K. V. Schmidt, “Computation of supervisors for reconfigurable machine tools,” 2012, vol. 45, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/35631.
