Efficiencies Of Choosing The Positions In Double Operation Cycle Of Storage an‎d Retrieval Vehicle

Automated storage and retrieval vehicle (ASRV) plays an important role in the goods storage planning of logistics centers and warehouses. The choice between the storage and retrieval positions in the double operation cycle (DOC) is aimed at reducing the required energy and the moving time of ASRV. To find logical choice between the storage and retrieval positions in the system for DOC, the required energy and the moving time of ASRV in DOC are compared with the ones in the single operation cycle (SOC) when the storage and retrieval positions in both DOC and SOC are changed in every compartment of the system. Firstly, the SOC model is created from the theory and the results of the experimental model to simulate the kinematic parameters, the power, the required energy of the driving and lifting units following to the moving time. The energy recovery is included in this model as well. Afterward, the DOC model is developed from the combination of the SOC model. The efficiencies of choosing the storage and retrieval positions to reduce the required energy and the moving time in DOC of the system will be shown by the results of the simulation model and the specific analyses.