Papers by Author: Yan Liu

Abstract: On the premise of data pre-processing by principal component analysis, in this paper, the largest Lyapunov exponent and generalized correlation dimension of multivariate time series are extracted based on the multivariate reconstruction presented. Though simulation analysis of coupling Rossler system, The results indicated that the method can identified and diagnosis fault accurately for complex system dynamics. The method has been used to fault character extraction for diesel engine with satisfactory results.

Abstract: Extract correlation dimension of vibration signal of reciprocating compressor based on G-P algorithm and empirical mode decomposition（EMD）technology, with found mode of EMD de-noise, with the incorporation of method of self-interrelated function and method of pseudo-phase portrait ensure delay-time and calculate embedding dimension by EMD method. Through simulation analysis of Lorenz system, Apply the method to identify valve faults of reciprocating compressor, the result indicate that the modeling method is effective.