e-journal

Sustainable and Robust Control of Cyclic Pallet Systems

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A proper control of a system to get a desired function and increase the system lifetime is a crucial step towards the sustainable paradigm. In this paper, such a control is designed for a cyclic pallet system to achieve a minimal force on its drive unit, meet safety conditions on the system chain tension force, and the momentum of pallets, and fulfill a desired production rate. The optimal values of control parameters, namely, number of pallets, conveyor velocity, and part set schedule, are obtained through solving a mixed integer linear optimization model. The objective function in the model defines the average force on the drive unit in a cycle production. In addition, the related constraints
characterize the pallet system properties such as cyclic and dynamic behavior, buffer size, constant work in process, and safety specifications. This optimization model strongly suffers from the
time complexity due to the binary decision variables defining the part set schedule. To reasonably handle the computation time, a heuristic search strategy based on a modified form of the weighted
profile fitting algorithm is introduced. Furthermore, the robustness of the optimal control and the system design is analyzed, using worst control and worst but safe control strategies. The optimal control and the robustness analysis are applied to some case studies, and the results are evaluated and discussed.
Note to Practitioners—In practice, engineers rigorously examine a constructed pallet system for a safe running and fulfillment of related objectives. This examination demands a lot of time and effort
and may show some defects that force them to redesign, reconstruct, and reexamine the system. These defects are occurred because current design and control strategies are not precise and robust enough to satisfy operation level objectives, as well as the systemdesign specifications. To significantly reduce the defects and save engineering times and costs, this paper provides a formal tool to characterize a robust control under which a cyclic pallet system safely and smoothly runs and gives a desired throughput. Moreover, the realized control is optimal and sustainable from this point of view that it minimizes the force load on the system drive unit and enhances its lifetime.
Index Terms—Heuristic algorithm, mixed integer linear programming, one-loop pallet system, optimal and robust control, tension force model.

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Informasi Detail

Judul Seri

IEEE TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING

No. Panggil

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Penerbit

New York : IEEE., 2013

Deskripsi Fisik

IEEE TRANSACTIONS ON AUTOMATION SCIENCE AND ENGINEERING, VOL. 10, NO. 4, OCTOBER 2013

Bahasa

English

ISBN/ISSN

1545-5955

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

VOL. 10, NO. 4, OCTOBER 2013

Subjek

TEKNIK

Info Detail Spesifik

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Pernyataan Tanggungjawab

Yuli/Agus

Versi lain/terkait

Lampiran Berkas

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