船舶电力推进系统仿真可信度FCE评估方法研究

为了提高船舶电力推进系统仿真的可信性分析准确性,提出采用模糊综合评判和基于相似度原理的综合方法对系统仿真进行分析。结合船舶电力推进系统的仿真模型,将影响仿真结果的可信性因素综合起来建立层次结构,并依据专家打分确定各子系统的相对权重。针对基于相似度原理所得的结果,采用自适应神经网络模糊控制系统确定子系统的隶属函数,对结果进行模糊化处理,并最终通过模糊综合评判确定系统的可信度。该方法结合神经网络对系统的隶属度函数进行修正,克服了主观确定隶属度函数的缺点;有效地解决了系统中含有定性定量数据求取可信度难的问题,具有一定的科学性和可信性。

Application of FCE for Credibility of Simulation of Ship Electric Propulsion System

In order to improve the credibility of simulation of ship electric propulsion system,a approach of integrating fuzzy comprehensive judgment with similarity is used to analysis the reliability of the system.According to the simulation model of ship electric propulsion system,the factors which influence the credibility of simulation results are combined to build the hierarchical structure,and the relative weight of each subsystem based on experts scoring is determined.The data that is calculating by adopting similarity principle method is made fuzzy by using adaptive neural network fuzzy control system.At last,the similarity of system is computed by means of fuzzy comprehensive evaluation.This method combined with neural network fuzzy control system to amplify subjected function,overcomes the disadvantage of subjective subjected function;What is more,this method that solves a difficult question for credibility effectively for systems of containing qualitative and quantitative data,is certainly scientific and credibility.