基于改进D-S证据理论的雷达生存效能

为了综合分析雷达的生存效能,通过调整非关键因素和不确定因素的基本可信度对证据理论中证据合成规则进行了改进,并基于改进D-S证据理论提出了雷达生存效能评估模型.改进后的证据合成规则不仅减小了证据的冲突,而且仍然满足证据的基本可信度之和为1的基本要求,保持Dempster合成规则所具有的可交换性.通过雷达生存效能模型应用的一个实际例子计算表明,证据理论是一种科学的效能评估方法,具有可行性和实用性,改进后的证据合成规则能够较好地分析雷达的生存效能.

Radar's survival efficiency based on a modified D-S evidence theory

Survival ability is the basis of radar operational capability. By means of adjusting the basic belief assignment, this paper improved Dempster's combination rule of evidences and presented an e-valuation model of radar survival efficiency based on a modified Dempster-Shafer (D-S) evidence theory in order to analyze radar survival efficiency. The modified combination rule of evidences can not only reduce the conflict among evidences, but also satisfy the basic requirement of evidences, namely, the sum of basic belief assignment is equal to 1. Also the modified combination rule of evidences maintains the exchangeability of Dempster's combination rule of evidences. Furthermore, an example was given to verify the application of radar survival efficiency model. The result shows that the evidence theory is a scientific efficiency evaluation means, which is feasible and practicable. The radar survival efficiency can be analyzed well by means of the modified combination rule of evidences.