基于FMI协议的跨领域多学科仿真系统建模分析

Modeling and analysis of interdisciplinary and multidisciplinary simulation system based on FMI protocol

应用传统分析方法对跨领域多学科仿真系统进行分析时,存在系统延长时间数值过小,导致最终的分析结果不准确的问题,因此,提出一种基于FMI协议的跨领域多学科仿真系统建模分析方法。利用FMI协议提取仿真系统元模型,明确元模型中的数据元素,使用Modlelica中的三类方程式和算法建立一个映射规则,计算映射过程中数据对象的变动量,最终得到分析模型的数学表达式,完成对仿真系统的建模分析。实验结果表明:与传统分析方法相比,基于FMI协议的跨领域多学科仿真系统建模分析方法,最终得到的系统延迟数值与实际延迟数值相差不大,最终得到的分析结果更准确,适合在实际分析中使用。

When the traditional analysis method is used to analyze the interdisciplinary simulation system,there is a problem that the value of system extension time is too small,which leads to the inaccuracy of the final analysis result.Therefore,a method of modeling and analysis of interdisciplinary simulation system based on FMI protocol is proposed.Using the FMI protocol to extract the meta model of simulation system,define the data elements in the meta model,use three kinds of equations and algorithms in modlelica to establish a mapping rule,calculate the changes of data objects in the mapping process,finally get the mathematical expression of the analysis model,and complete the modeling analysis of simulation system.The experimental results show that:compared with the traditional analysis method,the cross domain multi-disciplinary simulation system modeling and analysis method based on the FMI protocol,the final system delay value is not much different from the actual delay value,and the final analysis result is more accurate,which is suitable for practical analysis.