Browsing by Author "Kucukyasar, Melis"

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An Application Using Stability Increasing for the Grinding Machine Performance Improvement in the Automobile Industry
(SPRINGER INTERNATIONAL PUBLISHING AG, 2022) Mehmet Cakmakci; Ece Sonmez; Melis Kucukyasar; Sonmez, Ece; Cakmakci, Mehmet; Kucukyasar, Melis; F Calisir
At the beginning of the third millennium the use of the Industry 4.0 process has been accelerated and spread in different parts of production. With the rapid development of technology in production the workload also increases due to the role of the human being. The workload is a concept in which the human processing system is expressed in terms of its ability to process information and produce responses within the framework of its physical and mental characteristics. Especially in the manufacturing sector the contribution of the human being to the production increases with the technological function while physically decreasing with the developing machinery technologies. With this study it aims to increase the production capacity in line with meeting the increasing demands in these production units and improve the production plans of these units with the help of solution models to be developed by using appropriate analysis techniques of injector nozzles model measurements especially by using SMED approach within the lean manufacturing.
Citation - WoS: 6
Citation - Scopus: 7
Shuttle-Based Storage and Retrieval Systems Designs from Multi-Objective Perspectives: Total Investment Cost- Throughput Rate and Sustainability
(MDPI, 2023) Banu Y. Ekren; Berk Kaya; Melis Kucukyasar; Kaya, Berk; Kucukyasar, Melis; Ekren, Banu Y.
This paper studies performance comparison of two shuttle-based storage and retrieval system (SBS/RS) configurations developed on flexible or non-flexible travel policies of shuttles in the system. In the non-flexible SBS/RS a shuttle is dedicated to a tier so that it cannot travel out of its dedicated aisle and tier. A lifting mechanism is installed in each aisle to provide vertical travel for loads. In flexible SBS/RS shuttles can travel between tiers by a separate lifting mechanism installed on the other edge point of each aisle. The advantage of that flexible design is that there might be decreased number of shuttles settling in the system compared to the non-flexible design. We simulate the two system configurations and conduct an experimental design for the comparison purpose. Based on the three-performance metrics: total investment cost throughput rate and energy consumption per transaction the results show that mainly the flexible system provides better results which might be considered as future system investment for SBS/RS.
Citation - WoS: 24
Citation - Scopus: 28
Simulation-Based Performance Analysis for a Novel AVS/RS Technology with Movable Lifts
(MDPI, 2021) Boris Jerman; Banu Yetkin Ekren; Melis Kucukyasar; Tone Lerher; Jerman, Boris; Kucukyasar, Melis; Lerher, Tone; Ekren, Banu Yetkin
This paper studies a novel autonomous vehicle-based storage and retrieval system (AVS/RS) design with movable lifts (AVS/RS/ML). In the proposed system there are aisle-captive lifts that are able to travel along the warehouse aisle to position themselves at the target column location. Those lifts can lift up/down the autonomous vehicles to/from the target storage compartment when they are in standstill. This novel design is proposed as an alternative to existing AVS/RSs to balance the resource utilizations as well as to provide an inexpensive solution with highly utilized autonomous vehicles (i.e. AGVs). As an initial work for this novel system two alternative operating designs under different racking configurations are experimented. We compare those two designs by their throughput rate performance metrics under the arrival rate scenarios with highly utilized AGVs (i.e. 95%). Besides we experiment with two warehouse capacity scenarios: 900 and 1800 storage compartments. The results show that designs with two separate I/O point locations provide a better throughput rate than designs with single I/O point location. Besides a decreased number of columns in the system improves the system's performance.
Citation - WoS: 5
Two Scheduling Rule Comparisons for Operations of Shuttles in Tier-to-Tier SBS/RS
(SPRINGER INTERNATIONAL PUBLISHING AG, 2022) Melis Kucukyasar; Banu Yetkin Ekren; Kucukyasar, Melis; Ekren, Banu Yetkin; F Calisir
The aim of this paper is to study and compare two different scheduling rules for operations of transactions in shuttle-based storage and retrieval system (SBS/RS) to observe how scheduling rule affects the system performance. SBS/RS is one of the emerging automated warehousing technologies mostly utilized by large distribution centers due to its advantages of fast transaction process rate. Although the increased transaction rate is because of the system (warehouse) design of having multiple numbers of autonomous shuttles in the system operational rules such as scheduling of waiting transactions in queues may also play a significant role in increasing the system performance. For this purpose we implement first-in-first-out (FIFO) and shortest processes (i.e. travel) time scheduling rules for selecting waiting transactions in shuttle queues to investigate how these rules affect the performance of the system. We simulate the system under different racking designs and arrival rate scenarios and observe the system performance metrics in terms of average cycle time (e.g. throughput rate) and average energy consumption per transaction separately. The results suggest that the SPT scheduling rule outperforms FIFO rule especially for the throughput rate performance metric.