Modeling and Optimization of Hybrid Systems for the Tweeting Factory
Journal article, 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.

Author

Bengt Lennartson

Chalmers, Signals and Systems, Systems and control, Automation

Kristofer Bengtsson

Chalmers, Signals and Systems, Systems and control, Automation

Oskar Wigström

Chalmers, Signals and Systems, Systems and control, Automation

Sarmad Riazi

Chalmers, Signals and Systems, Systems and control, Automation

IEEE Transactions on Automation Science and Engineering

1545-5955 (ISSN)

Vol. 13 1 191-205

Driving Forces

Sustainable development

Areas of Advance

Production

Subject Categories

Robotics

DOI

10.1109/TASE.2015.2480010

More information

Latest update

5/29/2018