Compositional specification of functionality and timing of manufacturing systems

Abstract

van der Sanden, L.J.; Nogueira Bastos, J.P.; Voeten, J.P.M.; Geilen, M.C.W.; Reniers, M.A.; Basten, T.; Jacobs, J.; Schiffelers, R.R.H. Published in:Proceedings of the 2016 Forum on specification and Design Languages, FDL 2016, Bremen, Germany, September 14-16, 2016 Published: 01/09/2016 Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers)Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication Citation for published version (APA):van der Sanden, L. J., Nogueira Bastos, J. P., Voeten, J. P. M., Geilen, M. C. W., Reniers, M. A., Basten, T., ... Schiffelers, R. R. H. (2016). Compositional specification of functionality and timing of manufacturing systems. In Proceedings of the 2016 Forum on specification and Design Languages, FDL 2016, Bremen, Germany, September 14-16, 2016 General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research.• You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal ? Take down policyIf you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Abstract-This paper introduces a formal modeling approach for compositional specification of both functionality and timing of manufacturing systems. Functionality aspects can be considered orthogonally to timing aspects. The functional aspects are specified using two abstraction levels; high-level activities and lower level actions. Design of a functionally correct controller is possible by looking only at the activity level, abstracting from the different execution orders of actions and their timing. As a result, controller design can be performed on a much smaller state space compared to an explicit model where timing and actions are present. The performance of the controller can be analyzed and optimized by taking into account the timing characteristics. Since formal semantics are given in terms of a (max, +) sta...

Parametric Critical Path Analysis for Event Networks With Minimal and Maximal Time Lags

“…1 is 11, corresponding to the longest path src-ACD-sink. The latest realization of B is 4; the longest path from B to the sink is 7, and it can therefore occur in the range [2,4] without affecting the makespan.…”

“…In networks resulting from CPSs, the relations between events are typically derived from physical or control constraints that the CPS needs to adhere to [4], [5], [23]. It is often possible to parametrize the relations in the event network such that they are linear combinations of some (physical) parameters.…”

“…We describe two case studies and perform parametric temporal critical path analysis on them. We investigate the relative speeds of two robot arms for the Twilight system [4], and a specific reconfiguration aspect of the print head of a large-scale printer (LSP) [6]. Algorithms 1 and 2 have been implemented in C++ and run on a 64-bit Ubuntu machine.…”

“…The Twilight System [4] (see Fig. 7) is an example created for the study of controller synthesis and performance analysis of manufacturing systems.…”

“…Section IV first shows how to find critical paths and extends the terminology with parameters that can describe physical relations; it then shows how to find expressions for critical paths in parametrized event networks. In Section V we show the applicability of the method on two different manufacturing systems: the Twilight system [4], and a Large Scale Printer [5], [6]. These two examples show that we can quantitatively relate relaxation of parameters to productivity gains of the machine.…”