大气数据计算机仿真系统可信度评估

An Effective Evaluation of Credibility of Air Data Computer Simulation System

论述了综合航电大气数据计算机仿真系统的功能,建立了仿真模型,并根据VV&A思想给出了大气数据计算机仿真系统可信度评估流程,确定了仿真可信度评估方法,建立了仿真可信度的研究模型,对传统的可信度计算公式进行了改进,提出了新的可信度计算公式。利用该方法对大气数据计算机仿真系统进行了可信度评估,从仿真输出的动态变化数据中考察了仿真系统可信度的变化情况。与传统可信度评估方法相比,此方法更加可信、有效,为大气数据计算机仿真系统可信度研究提供了一种较好的途径。

Sections 1,2 and 3 of the full paper explain what we believe to be an effective credibility evaluation method.The core of section 2 is that,using the VVA（Verification,Validation and Accreditation） method,we divide the hierarchy of an air data computer simulation system,work out its credibility evaluation flow chart,whose block diagram is shown in Fig.3,and establishes its credibility model as given in Fig.4.The core of section 3 consists of：（1） we improve the traditional credibility calculation formula and propose our new credibility calculation formula as given by eq.（3）,which utilizes the similarity theory to evaluate the credibility of the air data computer simulation system and can do so effectively;（2） we calculate the credibility values of the air data computer simulation system for a certain airplane and examine the changes in its credibility;the simulation results,given in Table 2,and the calculation results,given in Tables 3 and 4,and their analysis show preliminarily that,compared with the traditional credibility evaluation method,our method can effectively evaluate the credibility of the air data computer simulation system.