仿真精度问题探讨

Research on Simulation Accuracy

精度是建模仿真可信度评估与逼真度研究的重点。在总结分析仿真精度概念的基础上,提出了仿真中影响精度的因素分类及其数学描述方法;接下来从评估的角度提出了一种建模仿真过程模型,并分析了模型的各个阶段中影响仿真精度的因素及其类型;进一步提出了仿真系统精度分析的概念框架及量化描述方法;然后重点讨论了仿真系统精度分析中的偏差传播规律,分别考虑了单模型,顺序模型,耦合模型等情形;最后给出了下一步的研究方向。

Accuracy is the key in simulation credibility assessment and fidelity study. Firstly, the concept of accuracy in the simulation field was summarized with its definition, classification and math descriptions in this paper. Then a modeling ＆ simulation process model was presented from the viewpoint of assessment, and the factors influencing simulation accuracy in each phase were analyzed. Following this, the framework of accuracy analysis in simulation systems was put forward, including the concept, goal, and quantitative description method. And the inaccuracy propagation laws of single model, sequential models and coupled models have been discussed in detail. Finally, the future research was proposed.