Modeling and Optimization of Hybrid Systems for the Tweeting Factory
Artikel i vetenskaplig tidskrift, 2016

In this paper a predicate transition model for discrete event systems is generalized to include continuous dynamics, and the result is a modular hybrid predicate transition model. Based on this model, a hybrid Petri net including explicit differential equations and shared variables is also proposed. It is then shown how this hybrid Petri net model can be optimized based on a simple and robust nonlinear programming formulation. The procedure only assumes that desired sampled paths for a number of interacting moving devices are given, while originally equidistant time instances are adjusted to minimize a given criterion. This optimization of hybrid systems is also applied to a real robot station with interacting devices, which results in about 30\% reduction in energy consumption. Moreover, a flexible online and event-based information architecture called the Tweeting Factory is proposed. Simple messages (tweets) from all kinds of equipment are combined into high-level knowledge, and it is demonstrated how this information architecture can be used to support optimization of robot stations.


Bengt Lennartson

Chalmers, Signaler och system, System- och reglerteknik

Kristofer Bengtsson

Chalmers, Signaler och system, System- och reglerteknik

Oskar Wigström

Chalmers, Signaler och system, System- och reglerteknik

Sarmad Riazi

Chalmers, Signaler och system, System- och reglerteknik

IEEE Transactions on Automation Science and Engineering

1545-5955 (ISSN) 15583783 (eISSN)

Vol. 13 1 191-205 7298471


Hållbar utveckling




Robotteknik och automation



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