Planning, Scheduling And Control Software Design Of Infusion Bag's Production Logistic System

This dissertation deals with some key issues in the design of non-pvc infusion bag production logistic system, including system configuration, balancing, buffer allocation, scheduling and control software design.The following contributions have been made.A hierarchy model with the objective, criteria and scheme layers is proposed for the system performance evaluation of the non-pvc infusion bag production logistic system. Base on triangular fuzzy number and Fuzzy AHP, the factors affecting cost, reconfigurable time, class, productivity and quality of the production line are obtained using eigenvalue method, leading to the optimized layout by maximizing a weighted objective function.By treating the local parallel layout as a serial layout, the balancing problem of the production line is investigated. Subject to the constraints of cycling time and process, a set of necessary facilities within the equivalent serial layout is determined by maximizing the balancing rate using Petri nets and genetic algorithm with hybrid chromos.The relationship between availability and buffer allocation of the production line is established using approximation and decomposition method for a serial production line model having multiple layers. A strategy to optimize the buffer allocation is proposed subject to the total buffer number. The half-parent crossover and single-parent mutation algorithm is employed to allocate a set of buffers within the production line.The scheduling of the production logistic system is investigated by treating it as a Job-shop scheduling problem. A genetic algorithm is proposed, in which two chromes are designed to represent the feeding sequence and route. With the aid of UML (Unified Modeling Language) and OOPN (Object Oriented Petri Net), an Emplant simulation model is formulated to implement the scheduling job by embedding GA into the model.System configuration, calling and control logic model of control software of palletizing line are proposed using Petri Net theory. Furthermore, Simulink-stateflow and Labview are used to fulfill all functions required in palletizing process.The simulation result shows that the production logistic system is basically balanced and the availability matches the theoretical results.Thus, it verifys the theory and method proposed.The outcome of this thesis is to be employed in infusion bag's production logistic system of Tailong Pharmaceutical Co., Ltd. It would also be useful for the development of other similar automatic logistic systems.