Browsing by Author "Sari, Z."

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Citation - WoS: 79
Citation - Scopus: 97
Simulation Analysis of Shuttle Based Storage and Retrieval Systems
(Daaam International Vienna, 2015) Lerher, T.; Yetkin Ekren, Banu; Sari, Z.; Rosi, B.
In this paper, a simulation-based performance evaluation of shuttle-based storage and retrieval system (SBS/RS) is presented. In comparison with well-known automated storage and retrieval systems, SBS/RSs can substantially increase the throughput capacity of the system. The objective of this study is to exploit the benefits of SBS/RS system design for reducing the mean cycle time of transactions and consequently increasing the throughput capacity of the system. Performance comparison of the studied SBS/RS is contrasted with alternative storage rack configurations, velocity profiles of the shuttle carriers and velocity profiles of the elevators' lifting tables in the system. The results show that SBS/RSs are effective in reducing the mean cycle time and also show large improvement by increasing throughput capacity.
Citation - WoS: 42
Citation - Scopus: 48
Warehouse Design Under Class-Based Storage Policy of Shuttle-Based Storage and Retrieval System
(Elsevier Science Bv, 2015) Ekren, B. Y.; Sari, Z.; Lerher, T.
In this study, we aim to find out the best rack design for shuttle-based storage and retrieval system (SBS/RS) under class-based storage policy (CSP). SBS/RS is a new technology in automated storage and retrieval system (AS/RS) which is developed for high transaction environments where mini load AS/RS crane may not be able to keep pace with the transaction rate needed over a given number of storage locations. We consider several rack design concepts in terms of number of aisles, tiers and bays in the warehouse. The performance of the system is evaluated in terms of utilizations of lifts and storage/retrieval devices and cycle times of storage/retrieval transactions. We utilize simulation for the modeling purpose. The results indicate that CSP works better under high rise warehouse design. So, this may create less number of lifts requirement in the system. Hence, the warehouse design with CSP may tend to have lower investment cost. By this study, we also aim to provide practitioners and academia a significant insight for SBS/RS design under several rack design concepts for CSP. (C) 2015, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.