Conflict Between Energy, Stability, and Robustness in Production Schedules
Artikel i vetenskaplig tidskrift, 2017

A systematic method to evaluate the conflict between robustness, stability, and energy consumption is proposed in this paper. Energy optimization is combined with robust scheduling techniques to analyze the tradeoff. In rescheduling, slack is often used to protect a schedule from disruptions. However, results from the literature on energy minimization show that a reduction in energy consumption is achieved by extending the execution time of operations. Thus, slack in schedules is diminished on behalf of longer execution times. The proposed method, which quantitatively shows this conflict, is based on a multiobjective optimization formulation where efficient computation of the involved criteria is developed. This includes a convex surrogate stability measure that makes it possible to evaluate different operation sequences by a mixed-integer nonlinear programming formulation. Previous works connecting the two research fields use simulation for analyzing the impact of disruptions in order to generate robust production schedules. Our results show that an increase in energy efficiency comes at a cost of reducing stability and robustness and hence becoming more sensitive to disruptions.

Robustness

Stability Criteria

Optimization

Energy Consumption

Schedules

Production

Författare

Nina Sundström

Chalmers, Signaler och system, System- och reglerteknik, Automation

Oskar Wigström

Chalmers, Signaler och system, System- och reglerteknik, Automation

Bengt Lennartson

Chalmers, Signaler och system, System- och reglerteknik, Automation

IEEE Transactions on Automation Science and Engineering

1545-5955 (ISSN)

Vol. 14 658-668 7831362

Styrkeområden

Informations- och kommunikationsteknik

Produktion

Ämneskategorier

Robotteknik och automation

DOI

10.1109/TASE.2016.2643621