Abstract：In order to extract leakage information of forging hydraulic press hydraulic system, a method of feature extraction based on double inverse limit space is proposed. The leakage information space of large forging hydraulic press hydraulic system is established, and double inverse limit space is established based on the leakage information space, and the two spaces are topological isomorphism. In a double inverse limit space, the large forging hydraulic press hydraulic system of leakage is reflected through the topological isomorphism. The feasibility of this theory is verified by simulation. The results show that ,the method of feature extraction based on double inverse limit space is more suitable for extracting the leakage coupling characteristics, the characteristics of information leakage extracted by this method has very good detection and location capability.
2015, Vol. 36 
