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1.
Advanced technologies in logistics engineering : automated storage systems with shuttles integrated with hoisted carriage
Tone Lerher, Primož Bencak, 2022, izvirni znanstveni članek

Opis: This paper presents automated storage systems with shuttles integrated with hoisted carriage for successful application in intralogistics. The first part of the paper presents classic and advanced AVS/RS along with specific intralogistics automation systems known as AutoStore from Swisslog and Skypod from Exotec. The second part of the paper focuses on an advanced system with shuttle vehicles capable of serving multiple tiers of the storage rack. An analytical model for the shuttle vehicles capable of serving multiple tiers of the storage rack is presented, which is based on (i) the sequences of acceleration, constant velocity and deceleration, and (ii) randomised assignment policy. Based on the presented model, the expected Single Command (SC) and Dual Command (DC) travel (cycle) time as well as the throughput performance of the shuttle vehicles capable of serving several tiers of warehouse, could be calculated. A programme code in MATLAB has been presented for the computation of throughput performances of automated storage systems with shuttles integrated with hoisted carriage capable of serving several tiers of the storage rack.
Ključne besede: analytical and numerical model, automated vehicle-storage and retrieval systems AVS/RS, automated warehouses, cycle time and throughput performance, shuttles integrated with hoisted carriage
Objavljeno v DKUM: 26.06.2024; Ogledov: 92; Prenosov: 2
.pdf Celotno besedilo (609,91 KB)
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2.
Method for evaluating the throughput performance of shuttle based storage and retrieval systems
Tone Lerher, Banu Y. Ekren, Zaki Sari, Bojan Rosi, 2016, izvirni znanstveni članek

Opis: In this paper a method for throughput performance calculation of shuttle based storage and retrieval systems (SBS/RS) is presented. SBS/RS represent a new technology in automated storage and retrieval systems. Since it is important to design SBS/RS right the first time due to the relative inflexibility of the physical layout, we provide a proposed method for the throughput performance calculation of these systems. The performance of the system is considered as a throughput capacity of the SBS/RS as a whole.
Ključne besede: automated warehouses, performance analysis, shuttle based systems, storage, logistics
Objavljeno v DKUM: 12.07.2017; Ogledov: 1419; Prenosov: 444
.pdf Celotno besedilo (611,95 KB)
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3.
Multi-objective optimization of automated storage and retrieval systems
Tone Lerher, Matjaž Šraml, Matej Borovinšek, Iztok Potrč, 2013, izvirni znanstveni članek

Opis: The multi-objective optimization of automated warehouse is discussed and evaluated in present paper. Since most of researchers in material handling community had performed optimization of decision variables with single objective function only (usually named with minimum travel time, maximum throughput capacity, minimum cost, etc.), the multi-objective optimization (time-cost-quality) will be presented in present research. For the optimization of decision variables in objective functions, the method with genetic algorithms is used. The main objective of our contribution is to determine the performance of the system according to the multi-objective optimization technique.
Ključne besede: automated warehouses, performance, multi-objective function, optimization
Objavljeno v DKUM: 10.07.2015; Ogledov: 1083; Prenosov: 69
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4.
A multi-objective optimization approach for designing automated warehouses
Tone Lerher, Matej Borovinšek, Iztok Potrč, Matjaž Šraml, 2012, objavljeni znanstveni prispevek na konferenci

Opis: A multi objective optimization of automated warehouses is discussed and evaluated in present paper. Since most of researchers in material handling community had performed optimization of decision variables with single objective function only (usually named with minimum travel time, maximum throughput capacity, minimum cost, etc.), the multi objective optimization (travel time - cost - quality) will be presented. For the optimization of decision variables in objective functions, the method with genetic algorithms is used. To find the Pareto optimal solutions, the NSGA II genetic algorithm was used. The main objective of our contribution is to determine the performance of the system according to the multi objective optimization technique. The results of the proposed model could be useful tool for the warehouse designer in the early stage of warehouse design.
Ključne besede: automated warehouses, material handling, multi objective optimization
Objavljeno v DKUM: 10.07.2015; Ogledov: 1291; Prenosov: 34
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