Logistics Scheduling And Inventory Controlling Of Tobacco Formula Raw Material Automatic Storage And Retrieval System

Except reducing resources consumption and improving labor productivity, the modern logistics is deemed to "Third Profit Headspring", and storage is an important component of modern logistics. The rational and efficient storage can help tobacco manufacturing companies expedite the flow speed of materials, reduce the cost and ensure the manufacture to go on wheels. At present, the majority of tobacco manufacturing companies adopt AS/RS to store the tobacco formula raw material and to carry the goods into or out of the warehouse. To develop the function of corresponding advanced equipments and technologies, this thesis executed relevant researches on logistics scheduling and inventory controlling during its operation process.The discrepancy ability of a tobacco formula raw material AS/RS was calculated based on the introduction and analysis of its composition and operation process. Its existing problems and the improvement of the I/O transportation system was analyzed. When the transformed AS/RS was operated, the optimal selection of AGV and its optional route, lane stackers and goods' locations were necessary. This thesis established the combined scheduling model of AGVs and lane stackers on the basis of the representation of goods location, process and service times of lane stacker. The solution method of improvement for genetic algorithms under certain constraint conditions was also presented based on some basic hypothesis and parameter definitions. The combined scheduling model and the solution method were demonstrated.Then, this thesis made corresponding strategies of inventory controlling according to the specific requirement of the tobacco formula raw material AS/RS. The coat-based inventory controlling model was thus established and solved in ordor to determine the sound order time, inventory review cycle and order quantity.At last, this thesis used the QUEST software package to simulate the operation process of the tobacco formula raw material AS/RS under the combined scheduling of AGV and lane stacker and the corresponding strategies of order time and order quantity mentioned above. The operation efficiency of loading and unloading as well as the utilization of AGVand lane stackers were analyzed.