动态激励下的非线性电阻网络软故障诊断  

Soft-fault Diagnosis of Nonlinear Resistance Network With Dynamic Excitation

作　　者：徐晨曦[1] 陈光[1] 李桂祥[2] 沈阳 项建涛[2] 

机构地区：[1]电子科技大学自动化工程学院,成都610054 [2]空军雷达学院预警探测装备系,武汉430019 [3]空军驻沪宁地区军事代表室,南京210013

出　　处：《空军雷达学院学报》2008年第2期139-142,共4页Journal of Air Force Radar Academy

摘　　要：针对非线性电阻网络软故障、多故障诊断问题,提出了一种基于动态激励的软故障诊断方法.通过解轨迹多项式拟合导出非线性电阻网络动态响应的多项式模型,分析了多项式系数在故障诊断方面的性质;在递推最小二乘(RLS)方法估计多项式系数的基础上,导出基于解轨迹多项式系数的故障诊断方程.该方法不仅具有软故障、多故障分析能力,而且具有实时性好、分析动态范围大等特点.最后,通过仿真实例说明该方法的有效性.For soft-fault and multi-fault diagnosis of nonlinear resistance network, an approach of fault diagnosis was presented based on the dynamic excitation. The polynomial model of the dynamic response of nonlinear resistance network was derived by using trajectory polynomials approximation, the properties of polynomial coefficients were analyzed with respect to the fault diagnosis, and the fault diagnosis equation based on the trajectory polynomial coefficients was given in terms of the recursive RLS estimating polynomial coefficients. The proposed approach has not only the capability of soft-fault and multi-fault analysis, but also the characteristics of real-time and wide dynamic range test. Finally, by simulation it shows that the proposed approach is of effectiveness.

关 键 词：非线性电阻网络 故障诊断 动态激励 解轨迹多项式 

分 类 号：TP391.4[自动化与计算机技术—计算机应用技术]