• Title/Summary/Keyword: 스태커 크레인

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The Efficiency Determinants to Port Cargo Equipment on Container Terminals to DEA & Tobit Model (DEA와 Tobit 모형에 따른 컨테이너 터미널의 하역장비 효율성 결정요인)

  • Park, Hong-Gyun
    • Journal of Korea Port Economic Association
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    • v.26 no.3
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    • pp.1-17
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    • 2010
  • This paper focuses on measuring the efficiency of container yards in container terminals in Busan and Gwangyang using Data Envelopment Analysis (DEA) approach. It analyses the relative efficiency of 11 container terminals based on the data for the period between 2006 and 2009 to offer a fresh perspective. The applied framework assumes inputs to be container cranes, transtainer cranes and yard tractors and output as container transshipment volume. Through the analysis, the differences between the impact of using of container cranes, transtainer cranes and yard tractors, top handler & reach stacker on container yard efficiency are measured. Moreover, the associations between the three input factors are analyzed as well. This paper also employs heteroscedastic Tobit model to show the impact of explanatory variables on container yard efficiencies. I took into consideration the strategies for operation of container cranes, transtainer cranes and yard tractors in container yard.

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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Optimal Design of Automated Storage/Retrieval Systems Considering Capacity of Stacker Cranes (스태커 크레인 능력을 고려한 자동 창고 최적 설계에 관한 연구)

  • 이영해;최영하;이문환
    • Journal of the military operations research society of Korea
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    • v.24 no.2
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    • pp.75-94
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    • 1998
  • AS/RS(Automated Storage/Retrieval Systems) has inflexibility in change after implementation and its initial cost is very high. Therefore, the proper and correct design of AS/RS is needed at the planning stage. Cost and performance are one of the most important factors in AS/RS design. There is a trade-off relationship between them. Velocity and number of stacker cranes have a deep relationship with performance of AS/RS. In this study, a model and a heuristic algorithm for finding optimal rack volumes and velocities of stacker for design of AS/RS are proposed with a numerical example.

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A genetic algorithm for determining the optimal operating policies in an integrated- automated manufacturing system (통합자동생산시스템에서 최적운영방안 결정을 위한 유전자 알고리즘의 개발)

  • 임준목
    • Journal of Korea Society of Industrial Information Systems
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    • v.4 no.2
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    • pp.62-72
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    • 1999
  • We consider a Direct Input Output Manufacturing System(DIOMS) which has a munber of machine centers placed along a built-in Automated Storage/Retrieval System(AS/RS). The Storage/Retrieval(S/R) machine handles parts placed on pallets for the machine centers located at either one or both sides of the AS/RS. This paper deals with the operational aspect of DIOMS and determines the optimal operating policy by combining computer simulation and genetic algorithm. The operational problem includes: input sequencing control, dispatching rule of the S/R machine, machine center-based part type selection rule and storage assignment policy. For each operating policy, several different policies are considered based on the known research results. In this paper, using the computer simulation and genetic algorithm we suggest a method which gives the optimal configuration of operating policies within reasonable computation time.

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A Development of Educational Program for Evaluating the Efficiency of Warehouse System (창고 시스템의 효율성 평가를 위한 교육용 프로그램 개발)

  • Kim, Moon-Ki;Kim, Hee-Sung
    • The Journal of Korean Institute for Practical Engineering Education
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    • v.4 no.1
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    • pp.80-85
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    • 2012
  • The importance of warehouse is increasing since the role of warehouse in modern industry is changing from concept of storage to concept of circulation which facilitates purchasing, production, storage and distribution activities by induction of information system. In this study, a program is developed using C# for evaluating efficiency of automated storage and retrieval system(AS/RS). A simulation work is done for eight operating schemes under the combination of three conditions, which are storing method, the shape of automatic warehouse and the sequence of command performs, and the moving distance of stacker crane is calculated using the same gateway data. Using this program, the optimal operating scheme can be proposed based on the analyzed results of simulation. This progrm shows the effectiveness and applicability through the simulation work and can be utilized for courses which are related to factory facilities.

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