Research On Modeling And Simulation Technology Of Integrated Logistics Support System Based On Petri Net

Integrated logistics support has become the key factor to win the information-based warfare. The prominent characteristic of integrated joint operation is the system combat. It is necessary to establish the integrated logistics support system (ILSS) meeting the requirements of system combat. ILSS contains many elements such as support programming, storage and transportation, support equipments, technical data, etc. There are tight links and cross couplings among those elements, which make the support system exhibit extremely complicated dynamic characteristics. It is in urgent need to develop researches on modeling and simulation technology in operation law of ILSS for establishing systems which are rational, elements-matched and whole coordinated.This dissertation has proposed an improved stochastic Petri net (ISPN) modeling method from the characteristics of ILSS and programmed the arithmetic of simulation based on MATLAB. The main research contents and innovations of this dissertation include:1.Methods used in modeling ILSS were described, and it was proved that Petri net is more appropriate than others in modeling ILSS.2.Some disadvantages of Molloy's Stochastic Petri net (SPN) in modeling ILSS and analysis were analyzed. Hereby, ISPN was proposed by introducing inhibitor arc, putting forward a method to realize global time and choosing rational transition steps and rules. ISPN is more suitable to model and analyse ILSS.3.Some basic models of ILSS were established and the evaluation indexes were chosen. They are foundations of establishing complex models of ILSS.4.Based on MATLAB and discrete event system simulation process, the arithmetic of simulation was programmed, which can simulate any model established by ISPN.5.The using and maintenance process of an information sending and receiving subsystem was modeled by ISPN. It is a k-out-of-N system in a certain type missile equipment. By simulating the k-out-of-N system models under different m maintenance policies, modeling and simulation method of ISPN was proved to be correct.6.An ISPN model was established to simulate the using and maintenance process of some weapon system. The resource allocation of the weapon system was optimized by analysing the results of simulation.The modeling and simulation method put forward in this dissertation is useful not only in providing an theoretical guidance in resource allocation and maintenance plan decision, but also in providing reference to design and improvement of equipments and support systems. Especially, it has military meaning and academic value in scientific construction and resource optimization of large and complex ILSS.