Journal
INTERNATIONAL JOURNAL OF PRODUCTION RESEARCH
Volume 54, Issue 21, Pages 6285-6301Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00207543.2016.1197438
Keywords
production system; switch-on; off control; Bernoulli machine; energy-efficient production
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Funding
- U.S. National Science Foundation, Division of Civil, Mechanical and Manufacturing Innovation [CMMI-1411516]
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In recent years, achieving high energy efficiency has become one of the primary goals in manufacturing, along with maintaining high productivity and quality. In many manufacturing systems, it is sometimes possible to temporarily switch off a machine to reserve energy, and switch it back on when a certain condition is met. Indeed, production control-based shop floor continuous improvement is recognised as one of the most cost-effective ways to achieve energy-efficient production. In this paper, we study serial production lines with Bernoulli machines and finite capacity buffers and assume that some of the machines in the line can be switched on and off during the production process according to a state-based feedback control policy. Mathematical models for the system under consideration are derived and analytical methods are developed for calculating the system performance measures during transients. Specifically, exact Markovian analysis is used for two- and three-machine lines in which the switch-on/off operations of only one machine is considered. For longer lines, the switch-on/off operations of multiple machines are considered and an aggregation-based approximation approach is applied to evaluate the system performance measures. Numerical experiments show that the method developed can be used to efficiently calculate the system's performance with high accuracy.
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