摘要
根据安全评价等级系数法的评价指标体系和权重，对人机环境系统安全性评价的模糊数学方法进行研究。研究表明，对于同一个评价对象，采用模糊评价法和等级系数法所得结论并非在所有情况下都完全相同。其主要原因是方法本身存在差别，且等级系数法的最终安全等级取值论域与各层次指标的安全等级取值论域不一致。利用安全等级模糊特征量的概念和方法，指出模糊评价的结果是一个模糊集合ＨμＡ而非安全等级论域中的一个确定点，等级系数法的评价结果Ｄ∈ＨμＡ。模糊评价法中三角函数型隶属函数优于梯形隶属函数。两种方法对比表明，模糊评价法优于等级系数法。
According to the evaluating index system and weight in the grade coefficient method of safety evaluation,a fuzzy mathematical method for the safety evaluation of man-machine environment system is studied in this paper. The result shows that for the same subject,the conclusions obtained from the methods of fuzzy evaluation and grade coefficient are not the same in all situation. The main reasons are the difference of the method itself and the difference in obtained value theory domain between final safety grade and each level of grade coefficient method. By using the concept and method of safety grade fuzzy characteristics quantity,it is revealed that the result of fuzzy evaluation is a fuzzy set H μA ,not a definite point in safety grade theory domain. Evaluation result of grade coefficient method is D∈H μA . The trigonometric membership function has advantage over trapezoid membership function in fuzzy evaluation . By comparing the results of the two methods, the fuzzy evaluation method is better than the grade coefficient method.
出处
《人类工效学》
1999年第2期16-19,共4页
Chinese Journal of Ergonomics
基金
国家"九五"攻关项目
关键词
人-机-环境系统
安全性评价
模糊数学
等级系数法
man-machine environment system
fuzzy evaluation
safety grade
fuzzy characteristics quantity
membership grade
