Hybrid Petri net and fluid stochastic Petri are two modeling methods for hybrid system. Their modeling mechanism and analysis method are different and the two modeling formalisms are still evolving. Through converting for each other, one modeling method can use the others modeling primitives and analytical method for analyzing system, which is helpful for the future development of them. The formal conversion from hybrid Petri net to fluid stochastic Petri net and a transition mergence method after conversion were proposed. Also, the effectiveness of proposed conversion and mergence was proofed. At the end of paper, a case was illustrated for describing the process of conversion and mergence.%混合Petri网和流体随机Petri网作为混合系统的建模方法,其内在的建模机制和分析方法不尽相同,而且这两种机制远未发展成熟.分析并建立它们之间相互转换的方法有助于机制本身的发展完善,并利用对方的建模原语和分析方法对系统进行多角度的分析.提出了一阶混合Petri网转换成流体随机Petri网的形式化方法及转换后变迁合并的方法,并给出了转换和合并方法的正确性证明,最后结合实例简要阐述了这两种方法的实现过程.
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