• Title/Summary/Keyword: stacker crane

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A Study on the Development of Small Size Three-Axis Stacker Crane for Automatic Ware House (소형 자동차고용 3축 Stacker crane 개발에 관한 연구)

  • Kim, J.Y.;Sim, J.K.;Kim, H.S.;Han, J.H.
    • Journal of the Korean Society for Precision Engineering
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    • v.12 no.8
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    • pp.131-139
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    • 1995
  • In this study, small size stacker Crane for automatic ware house and interface circuit is designed and manufactured. IBM-PC is used as a controller. At 50kg$_{f}$ load, optimal motion velocity is 20 mm/min for X and Y axis and 12 mm/min for Z axis. Position fesolution is 0.005 mm and repeatability is .+-. 0.025 mm. Through characteristic experiment, effectiveness of the designed and manufactured stacker crane. PC control program, and design of interface circuit and construction of control system are shown. From these results, the developed stacker crane can be apply to FMS(Flexible Manufacturing System) and FA(Factory Automation) of industrial field.d.

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Study on Trouble Diagnosis of Stacker Crane by Case Base Inference (사례추론에 의한 S/C 이상진단에 관한 연구)

  • Kim, Dong-Hun;Song, Jun-Yeop
    • 연구논문집
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    • s.25
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    • pp.99-104
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    • 1995
  • At present, a lot of researches on AS/RS(Automatic Storage and Retrival System) are being performed and also applied to realization of FA, FMS and CIM. Especially facility management and diagnosis of stacker crane that is major equipment of AS/RS, is recognized more importantly. In this paper, Case Base is designed for manager that is non-expert and it is implemented according to possible trouble case for the purpose of trouble diagnosis and maintenance of stacker crane.

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Position Control of AS/RS Stacker Crane By Using Cain-Scheduled Control Method in Automated High Rack Warehouse System

  • Kim, Hwan-Seong;You, Sam-Sang;Shigeyasu Kawaji
    • 제어로봇시스템학회:학술대회논문집
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    • 1999.10a
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    • pp.198-201
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    • 1999
  • An automated storage and retrieval machinery for high rack warehouse systems is developed in order to stack the various kinds of productions. However, according to increase in the rack height, the long lead time should be taken. In stacker crane systems, the variations of the lifting height and the load generate the vibration of lifting machine, and it makes a Position control to be difficult Therefore, the reduction of vibration will be important factor for saving the lead time and the damage of Productions. This paper deals with a position control of stacker crane in automated high rack warehouse system by using a gain-scheduled control algorithm via a LMI method, where the variations of elastic coefficient of the stacker crane's post are considered.

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Dynamic Characteristics Analysis of Stacker Crane for Automatic Warehouse(I) (자동창고용 스태커 크레인의 동특성 해석(I))

  • Shin, Sang-Ryong;Lee, Yun-Sig;Kim, Jong-Jun;Lee, Ho-Taek;Lee, Sang-Hul;Yun, Suk-Ho
    • Proceedings of the KSME Conference
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    • 2001.06b
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    • pp.428-435
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    • 2001
  • In this paper, the design factors of stacker crane for the automatic warehouse are verified by dynamic simulation process. Simulation model is designed as the form of rigid elements and discrete flexible beam connections. The various result for structural design of stacker crane is produced by dynamic simulation and experiment. For the simulation of structural dynamics, ADAMS which is a software for kinematic & dynamic simulation, is used. In order to verify the analysis method, simulation and experiment result are compared.

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Dynamic Characteristics Analysis of Stacker Crane for Automatic Warehouse(II) (자동창고용 스태커 크레인의 동특성 해석(II))

  • Kim, Jong-Jun;Lee, Yun-Sig;Shin, Sang-Ryong;Lee, Ho-Taek;Jo, Dae-Ha
    • Proceedings of the KSME Conference
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    • 2001.06b
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    • pp.436-441
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    • 2001
  • In this paper, stacker crane is modeled as rigid elements and discrete flexible beam connections by kinematics & dynamics solver package program instead of deriving the equations of motion which describes the total dynamics of the system. For the simulation of structural dynamics, ADAMS, a software for the simulation of multiple rigid body dynamics, is used. Some kinds of works are fulfilled to examine the dynamic characteristics of system. In order to verify the analysis method, the results of simulation and experiment are compared.

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A Simulation Study for Optimizing the Functionality of an Automated Storage and Retrieval System (자동창고 시스템의 최적안 도출을 위한 모의실험적 연구)

  • Kim, Moon Ki
    • Journal of the Korean Society of Manufacturing Technology Engineers
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    • v.23 no.5
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    • pp.505-511
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    • 2014
  • The functional role of warehouses in modern industry is changing from an established concept of storage to a concept of circulation. The target of this study is to improve the stacker crane's efficiency for the internal operations of the Automated Storage and Retrieval System (AS/RS). Eight operating schemes are proposed under the combination of three conditions, namely, the storing method, the layout type, and the sequence of command execution. The moving distance of the stacker crane is calculated using the same gateway data through a simulation based on a C# program. The optimal operating scheme is proposed based on the analyzed simulation results. In conclusion, the combination of conditions of random storage, two-way type warehouse, and dual command execution elicits optimum results in travel efficiency for the stacker crane.

A Sequencing Algorithm for Order Processing by using the Shortest Distance Model in an Automated Storage/Retrieval Systems (자동창고시스템에 있어서 최단거리모형을 이용한 주문처리결정방법)

  • 박하수;김민규
    • Journal of Korean Society of Industrial and Systems Engineering
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    • v.18 no.33
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    • pp.29-37
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    • 1995
  • An Automated Storage/Retrieval Systems(AS/RS) has been gradually emphasized because of the change of production and distribution environment. This paper develops algorithm and Shortest Distance Model that can reduce the traveling time of a stacker crane for efficient operation of AS/RS. In order to reduce the traveling time of a stacker crane, we determine the order processing and then the sequencing of storage/retrieval for each item. Order processing is determined based on the SPT(Shortest Processing Time) concept considering a criterion of retrieval coordinate. The sequencing of storage/retrieval is determined based on the Shortest Distance Model by using a modified SPP(Shortest Path Problem) of network problem. A numerical example is provided to illustrate the developed algorithm and Shortest Distance Model.

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A Study on Rail Crane Scheduling Problem at Rail Terminal (철송 크레인 일정계획문제에 관한 연구)

  • Kim, Kwang-Tae;Kim, Kyung-Min;Kim, Dong-Hee
    • Proceedings of the KSR Conference
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    • 2011.05a
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    • pp.269-276
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    • 2011
  • This paper considers the rail crane scheduling problem with minimizing the sum of the range of order completion time and make-span of rail crane simultaneously. The range of order completion time implies the difference between the maximum of completion time and minimum of start time. Make-span refers to the time when all the tasks are completed. At a rail terminal, logistics companies wish to concentrate on their task of loading and unloading container on/from rail freight train at a time in order to increase the efficiency of their equipment such as reach stacker. In other words, they want to reduce the range of their order completion time. As a part of efforts to meet the needs, the crane schedule is rearranged based on worker's experience. We formulate the problem as a mixed integer program. To validate the effectiveness of the model, computational experiments were conducted using a set of data randomly generated.

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Multi-load Automated Storage/Retrieval Systems (복수운반형 자동창고)

  • Rim, Suk-Chui;Kim, Yong-Jin
    • Journal of Korean Institute of Industrial Engineers
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    • v.21 no.2
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    • pp.239-254
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    • 1995
  • Automated Storage/Retrieval (AS/R) systems have been used mostly in manufacturing or distribution industry in order to store or retrieve palletized items automatically. Since the items ore heavy or bulky, only one pallet at a time is moved by the stacker crane In this study, however, we introduce the "multi -load" AS/R system in which the items to be stored are data storage devices of equal size such as video tape or compact disc. Since the items are small and light multiple items can be stored and retrieved in each trip by using a magazine and a robot arm mounted on the crane Given the magazine capacity, and the locations of retrieval items and empty cells in the rack, the throughput of the multi-load AS/R system will depend on the selection of storage locations and the sequence of visits. We propose four heuristic algorithms for the multi-command. Computer simulation is used to evaluate the four algorithms in terms of throughput and number of back tracking of the crane.

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