Simultaneous optimisation of control factors in automated storage and retrieval systems and FMS using stochastic coloured Petri nets and the Taguchi method

1996 ◽  
Vol 12 (2) ◽  
pp. 137-144 ◽  
Author(s):  
A. K. Chincholkar ◽  
O. V. Krishnaiah Chetty
Keyword(s):  
Taguchi Method ◽  
Petri Nets ◽  
Coloured Petri Nets ◽  
Storage And Retrieval ◽  
Control Factors ◽  
Retrieval Systems ◽  
Automated Storage

Average Cycle Time Modelling for Multi-Aisles AS/RS Using Timed Petri Nets

2020 ◽  
Vol 50 ◽  
pp. 1-14
Author(s):  
Yassine Boudghene Stambouli ◽  
Samir Hamaci
Keyword(s):  
Petri Nets ◽  
Cycle Time ◽  
System Throughput ◽  
Discrete Events ◽  
Timed Petri Nets ◽  
Storage And Retrieval ◽  
Retrieval Systems ◽  
Knowing That ◽  
Graphical Tool ◽  
Automated Storage

In this paper we consider the Multi-Aisle Automated Storage and Retrieval Systems where only one Storage/Retrieval machine (crane) is used, which has the advantage of decreasing the system costs but at the same time has the disadvantage of reducing the system throughput. This important performance evaluation parameter is highly related to another equally important one i.e. the cycle time of the crane. Because of its repercussions on the whole system performances, we are interested here in the modeling of this average cycle time, knowing that it could bring positive and significant advantages in terms of efficiency and accuracy, and consequently throughput and productivity. For that, the system to be studied is considered as Discrete Events System. To model it, we use a dedicated graphical tool known under the name Timed Petri Nets in the purpose to explore the theory used to evaluate the performances of these systems.

scholarly journals Multiple products management system with sensors array in automated storage and retrieval systems

2018 ◽  
Vol 297 ◽  
pp. 012052
Author(s):  
Supachai Vongbunyong ◽  
Perawat Roengritronnachai ◽  
Savanut Kongsanit ◽  
Chawisa Chanok-owat ◽  
Pongsakorn Polchankajorn
Keyword(s):  
Management System ◽  
Storage And Retrieval ◽  
Multiple Products ◽  
Retrieval Systems ◽  
Sensors Array ◽  
Automated Storage

Development of Automatic Storage Retrieval System for Variable Loads

2021 ◽  
Vol 18 (1) ◽  
pp. 99
Author(s):  
Afzeri Tamsir
Keyword(s):  
Data Storage ◽  
Integrated System ◽  
Numerical Control ◽  
Storage And Retrieval ◽  
Retrieval Systems ◽  
Speed Up ◽  
Automated Storage ◽  
Warehousing Systems ◽  
And Storage ◽  
Carrier Element

 Automated Storage and Retrieval Systems (ASRS) have been widely used in warehousing systems to speed up load movements and save storage space. ASRS is an integrated system that is equipped with a controller and arm for the collection and storage of goods. This paper discusses the results of developing a system for taking and storing goods for various loads. The prototype element consists of a mechanism for retrieving, placing and application for data collection into the database. In this research, the design and development of ASRS was carried out to be applied in the storage of products of various sizes which is suitable for small size industries. The development process includes investigating features that have been developed in the ASRS, operating procedures, hardware selection and software development in accordance with the mechanism designed. Numerical control which moves the carrier element with high resolution is applied to be able to place the load in a changing position. Development and testing is carried out to ensure the performance of the tool runs well and the data storage that includes the identification and size of the load can be recorded properly.

Automated storage and active cleaning for multi-material digital-light-processing printer

2019 ◽  
Vol 25 (5) ◽  
pp. 864-874 ◽  
Author(s):  
Christopher-Denny Matte ◽  
Michael Pearson ◽  
Felix Trottier-Cournoyer ◽  
Andrew Dafoe ◽  
Tsz Ho Kwok
Keyword(s):  
Material Handling ◽  
Storage System ◽  
Digital Light Processing ◽  
Content Type ◽  
Storage And Retrieval ◽  
Retrieval Systems ◽  
Cleaning Solution ◽  
Multiple Materials ◽  
Automated Storage ◽  
Compact Design

PurposeThe purpose of this paper is to introduce a novel technique for printing with multiple materials using the DLP method. Digital-light-processing (DLP) printing uses a digital projector to selectively cure a full layer of resin using a mask image. One of the challenges with DLP printing is the difficulty of incorporating multiple materials within the same part. As the part is cured within a liquid basin, resin switching introduces issues of cross-contamination and significantly increased print time.Design/methodology/approachThe material handling challenges are investigated and addressed by taking inspiration from automated storage and retrieval systems and using an active cleaning solution. The material tower is a compact design to facilitate the storage and retrieval of different materials during the printing process. A spray mechanism is used for actively cleaning excess resin from the part between material changes.FindingsChallenges encountered within the multi-material DLP technology are addressed and the experimental prototype validates the proposed solution. The system has a cleaning effectiveness of over 90 per cent in 15 s with the build area of 72 inches, in contrast to the previous work of 50 per cent cleaning effectiveness in 2 min with only 6 inches build area. The method can also hold more materials than the previous work.Originality/valueThe techniques from automated storage and retrieval system is applied to develop a storage system so that the time complexity of swapping is reduced from linear to constant. The whole system is sustainable and scalable by using a spraying mechanism. The design of the printer is modular and highly customizable, and the material waste for build materials and cleaning solution is minimized.

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