故障诊断, 替代数据, 延迟向量方差算法, 非线性滴定法

Aiming at the complexity and nonlinearity of the fault machine system, a new method for fault diagnosis based on DVV(delay vector variance) and nonlinear titration was introduced. DVV algorithm was used to detect nonlinearity of the fault signals firstly, and the qualitative description about nonlinearity of the fault signals were given by DVV plot or DVV scatter diagram. Nonlinearity of different fault signals were then analyzed quantitatively by titration averages using nonlinear titration method. Results of experimental and engineering test indicate that the method is effective and it provides a qualitative and quantitative analysis way in machinery fault diagnosis.

fault diagnosis, surrogate data, delay vector variance algorithm, nonlinear titration method