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The signed directed graph (SDG) has been widely applied in the fault diagnosis. However, the structure of SDG is so complicated especially when it is used to describe a complex system. As a result, this will lead to the problem of combinatorial explosion and has limited SDG to the realistic application. To solve this problem, we present an improved SDG faults diagnosis algorithm in this paper. When...
This paper presents a method for neural network ensemble. In the method, five subsystems of classifier used four kinds of neural networks, such as SOM,PNN,LVQ,RBF. Those neural networks compute parallel which have been trained solely The recognition result of subsystems, the expectation and variance between input pattern and goal pattern have been integrated by analytical hierarchy process. In experiments,...
Fractal geometry is a new method to apply in analyzing fault signals. After researching the characteristic of rolling bearings, a new quantificational definition about fault signals of rolling bearings is proposed. Based on fractal theory and the conception of box dimension it can describe both non-stationary and non-linear signals of vibration signals generated by rolling bearings. Experiment results...
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