Performance Analysis of Distributed Function Block Control Application
分布式功能块控制应用的性能分析

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.