复杂装备的D-S故障诊断研究

Research of diagnosis method based on D-S for complex equipment

D-S证据理论已广泛地应用到故障诊断中,其中的证据合成一般可采用Dempser合成公式。在复杂武器装备中,领域专家可能给出矛盾的证据,此时需采用冲突证据合成公式,但已有研究都有各自的不足。不同性质的证据选用不同的合成公式,首先要求解决衡量证据矛盾性的问题。人们虽然对此已做了一些探讨,但都没有反映D-S故障诊断的需要。文中介绍了D-S故障诊断,包括Dempser合成公式、提出的冲突证据的优化合成公式、粒子群优化算法、提出的衡量证据冲突程度的方法、以及故障决策方法。通过某型装备验证了D-S诊断及所提新方法的有效性。

D-S evidence theory has applied to fauk diagnosis widely nowadays, the evidence synthesis of which can adopt synthesis formula with Dempser usually. In complex system of weapons and equipments, experts in this field provide paradoxical evidence, and conflict evidence synthesis formula should be adopted. But the shortages of research exist respectively. Evidence with different qualities adopts different synthesis formula. First measuring evidence contradiction should be solved. Although people have done some research work to it, the need of D-S fault diagnosis is not reflected. This paper introduces fault diagnosis with D-S, and synthesis formula with Dempser, optimization synthesis formula of conflict evidence given, PSO methods that is given to measure evidence conflict degree and fault decision-making methods are also involved. Last it proves the rationality of the D-S diagnosis and the new methods given by some equipment.