基于设备性能曲线的通信系统电磁兼容性评估方法

EMC assessment of communication systems based on the equipment performance curve

针对传统AHP-模糊综合评估方法在多级评判中隶属函数应用的不足,提出一种基于设备性能降级曲线特性的隶属函数确定方法,依据设备性能在受到干扰时的实际下降过程,划分评估等级,确定不同等级之间的过渡范围,以及过渡范围内的隶属函数形式,从而得到适用于评估具体设备的隶属函数模型。与传统的隶属函数相比,克服了其依靠专家经验确定所带来的不准确问题,以及将设备性能下降曲线线性化而带来的误差问题,可以更准确地得出设备隶属于不同等级的隶属函数;分析设备权重时,在专家打分确定权重系数的基础上,引入置信因子来分析由专家给出的权重系数的可信程度,最终建立一种基于设备性能下降曲线的通信系统电磁兼容性评估模型。

Aiming at the shortcoming of the membership function being used to evaluate muhi-levels in the traditional AHP-fuzzy comprehensive evaluation method, this paper presents an assessment method based on the curve characteristics of equipment performance degradation. Depending on the actual descent of the device performance when disturbed, the level of assessment and the transition range of the member- sh!p function among different levels are determined, finally obtaining the membership function model that is applicable to the assessment of specific equipment. The method can accurately calculate the specific classes and membership values of different equipment or subsystem and overcome the problem of subjectiv- ity that may cause errors in traditional membership functions. To analyze the weight of the equipment, ex- pert scoring was introduced meanwhile, the credibility of expert weight is analyzed by bringing in the confi- dence factor. A complex communication system evaluation model of the ship is established eventually, whose results of assessment are improved effectively.