基于RBF-Volterra的非线性电路故障诊断  

Faults diagnosis for nonlinear analog circuit based on RBF-Volterra series

作　　者：徐晨曦[1] 陈光[2] 

机构地区：[1]空军雷达学院预警探测装备系,武汉430019 [2]电子科技大学自动化工程学院,成都610054

出　　处：《电子测量与仪器学报》2010年第6期515-520,共6页Journal of Electronic Measurement and Instrumentation

摘　　要：故障诊断的重要前提是故障特征可比性原则,而可比性原则的条件是模型结构的不变性,这就要求同一参数模型起码能稳定地拟合同一电路的所有故障状态。针对故障状态下非线性强弱变化造成的参数估计数值稳定性问题,提出一种基于RBF-Volterra级数的非线性电路故障诊断方法。在平移联动约束下,由基函数多项式(BFP)导出RBF-Volterra级数,分析了RBF-Volterra级数的截尾不截维特性和对非线性强弱变化的适应能力.RBF-Volterra级数不仅数值稳定性好,而且结构紧凑能有效避免维数灾难问题。最后,通过实例仿真说明该方法的有效性。The comparison principle of the feature parameter is a, important precondition in fault diagnosis, its demand the model structure is invariable in process of parameter estimating for diverse faults of appointed circuit. And the robust problem of model structure become very important to parameter estimation with diverse faults. In this paper, the RBF-Volterra series is educed by basis-function polynomail （BFP） with limited to same discrete values of the translation parameters of basis function firstly. Then the advantage of RBF-Volterra series is discussed, which is not noly to improve the stability of parameter estimation but also can obtain the compact structure. Finally, a fault diagnosis approach for nonlinear analog circuit is represented based on RBF-Volterra series, and an example is given to illustration the proposed approach is available.

关 键 词：非线性模拟电路 故障诊断 VOLTERRA级数 基函数多项式 RBF-Volterra级数 

分 类 号：TN391.4[电子电信—物理电子学]