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分布式功能块控制应用的性能分析
引用本文:张渝,刘枫.分布式功能块控制应用的性能分析[J].计算机科学,2007,34(4):265-268.
作者姓名:张渝  刘枫
作者单位:西南大学计算机与信息科学学院,重庆400715
基金项目:国家高技术研究发展计划(863计划) , 重庆市科委自然科学基金 , 西南师范大学校科研和教改项目
摘    要:IEC61499功能块逐渐被工业采纳。本文针对分布式功能块控制应用(DFBCA)缺乏性能分析方法的情况,提出了一种基于随机Petri网的DFBCA性能分析方法。该方法以DFBCA的运行状态为着手点,利用Petri网易于表示系统中可能发生的各种状态变化及其关系的特点,将DFBCA转换为随机Petri网模型。再利用随机Petri网模型与马尔可夫链(MC)同构的特征,将随机Petri网模型转换为MC。得到的MC为DFBCA的性能分析提供了数学基础。最后基于MC的状态转移矩阵和稳态概率,对在每个状态中的驻留时间、变迁的利用率、变迁的标记流速、子系统延时时间等性能指标进行了分析。通过具体的示例说明了这种性能分析方法的可行性。

关 键 词:分布式功能块  控制应用  随机Petri网

Performance Analysis of Distributed Function Block Control Application
ZHANG Yu,LIU Feng.Performance Analysis of Distributed Function Block Control Application[J].Computer Science,2007,34(4):265-268.
Authors:ZHANG Yu  LIU Feng
Affiliation:Faculty of Computer and Information Science, Southwest University, Chongqing 400715
Abstract:IEC 61499 function block is accepted by industrial. As there does not exist efficient performance analysis methods for distributed function block control applications(DFBCA), the paper propose a DFBCA performance analysis method based on stochastic Petri net(SPN). The method focuses on DFBCA's operating state. For Petri net can represent possible state changing and it's relationship in systems, DFBCA will be transformed to SPN model . An SPN model is isomorphic to a continuous time Markov chain(MC). So SPN model can be transformed to its equivalent MC. The obtained MC provides the mathematic basis for performance analysis. Based on MC's transition matrix and steady probability, the paper analyzes theperformance index, such as the during time in certain state, usage efficiency of transition, the marking flow speed of the transition and time delay of the sub-system. An example is given to prove the feasibility of the performance analysis method.
Keywords:Distributed function block  Control application  Stochastic petri net
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