A method for evaluating the aging degree of an IGBT module
A technology of aging degree and implementation method, which is applied in the field of power electronic devices, can solve the problem that the prediction performance of extreme learning machines is overly dependent on the initial weight and threshold setting, etc., so as to improve the prediction regression ability, overcome the lack of search ability, and evaluate the results full effect
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[0056] The embodiments of the present invention are described in further detail below with reference to the accompanying drawings.
[0057] The present invention is implemented based on the following design principles:
[0058] 1. Extreme learning machine
[0059] The Extreme Learning Machine (ELM) is a fast single hidden layer feedforward neural network learning algorithm. The algorithm only needs to set the number of neurons in the hidden layer and the type of activation function. ELM can calculate the output weights according to the input weights and thresholds randomly generated before training, and finally obtain the optimal solution. Compared with the traditional neural network algorithm, ELM has the advantages of fast learning speed and good method performance.
[0060] For a single hidden layer neural network, the input layer has n neurons, the hidden layer has L neurons, and the output layer has m neurons. Suppose there are training data with Q samples {(x i ,y i )}, where t...
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