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时间离散随机Petri网是实时系统建模分析的一种重要工具,广泛应用在异步并发时间离散系统中,对时间离散随机Petri网模型进行模拟仿真分析是一个值得深入研究的课题。给出了一种运用硬件描述语言(VHDL)对时间离散随机Petri网进行描述和仿真的方法。首先介绍了时间离散随机Petri网的定义、特点,然后对其基本元素模块的硬件语言描述方法进行了讨论。最后以一个时间离散随机Petri网模型为例子,用VHDL语言对结构进行了描述,在Altera公司的集成开发工具QuartusⅡ进行编译、仿真,仿真波形表明了这种方法的正确性。
Time-discrete stochastic Petri nets are an important tool for real-time system modeling and analysis. They are widely used in asynchronous concurrent time-discrete systems. Simulation and analysis of discrete-time stochastic Petri nets is a subject worth further study. A method of describing and simulating discrete-time stochastic Petri nets by hardware description language (VHDL) is given. Firstly, the definition and characteristics of time discrete stochastic Petri nets are introduced, and then the hardware language description methods of its basic element modules are discussed. Finally, a time-discrete stochastic Petri nets model is taken as an example, the structure is described in VHDL language, and compiled, simulated and simulated by the integrated development tool Quartus II in Altera Corporation to demonstrate the correctness of this method.