基于粒子群和BP混合优化的采煤机故障诊断分类方法研究

故障诊断的本质是信号的特征提取与分类,BP神经网络是典型的一种分类方法。针对传统的BP算法易形成局部极小值,缺乏全局搜索性的缺点,利用粒子群算法可以在复杂、多峰、非线性及不可微的空间中实现快速、高效的全局搜索的特点,结合传统BP算法,提出一种基于PSO-BP混合训练神经网络的新方法。该算法首先利用粒子群算法的全局搜索能力对BP网络的权值进行优化,同时引入粒子群熵的概念对粒子群体中个体的多样性进行度量,当粒子群熵的估计值超过某一设定阀值时,用BP算法进行神经网络的训练。采用采煤机的轴承故障数据集对PSO-BP算法进行验证,证明该方法能够对采煤机的故障进行诊断。

Study on shearer fault diagnosis and classification methods based on hybrid of PSO and BP neural network

The essence of fault diagnosis is to extract and classify single features,and BP neural network is a typical classification method.As the traditional BP algorithm easily forms local minimum and lacks for global search trait,whereas PSO(particle swarm optimization) achieves rapid and efficient global search among intricate,multi-peaked,non-linear and non-differentiable space,a new method of training neural network based on hybrid of PSO and BP neural network is proposed in combination with the traditional BP...