以压力容器气体泄漏展开研究,提出了一种融合黄金正弦的减法平均优化器(subtraction-average-based optimizer with golden sine,GSABO)、优化变分模态分解(variational mode decomposition,VMD)和卷积神经网络(convolutional neural ne...以压力容器气体泄漏展开研究,提出了一种融合黄金正弦的减法平均优化器(subtraction-average-based optimizer with golden sine,GSABO)、优化变分模态分解(variational mode decomposition,VMD)和卷积神经网络(convolutional neural network,CNN)与支持向量机(support vector machine,SVM)联合分类检测的方法。首先,引入了融合黄金正弦的减法平均优化器对变分模态分解的参数模态个数K和惩罚参数α进行寻优,将最小包络熵为适应度函数得到最佳的K和惩罚参数α,计算最佳IMF分量的9种时域指标构建特征向量,输入CNN-SVM联合的分类方法进行特征提取并对气体泄漏情况进行识别。经实验分析,提出的引入融合黄金正弦的减法平均优化器优化后的VMD方法能够有效地自适应获取最优参数组,然后对压力容器气体泄漏声波信号进行特征提取,选取最优的特征组合输入CNNSVM联合分类检测,得到泄漏与否判别准确率高达99.16%,有助于对后续研究进一步开展。展开更多
准确的高铁沿线风速预测是铁路灾害预警系统的基础需求,为了提升应对和处理强风灾害致突发事件的能力,提出一种基于减法平均优化(subtraction average based optimizer,SABO)算法优化长短时记忆(long short-term memory,LSTM)神经网络...准确的高铁沿线风速预测是铁路灾害预警系统的基础需求,为了提升应对和处理强风灾害致突发事件的能力,提出一种基于减法平均优化(subtraction average based optimizer,SABO)算法优化长短时记忆(long short-term memory,LSTM)神经网络的高铁沿线短期风速预测方法。首先,针对风速非线性和非平稳特性,采用极小化极大(min-max,MM)方法对风速数据进行归一化处理;其次,采用SABO算法中的“-v”方法对LSTM模型的关键参数搜索寻优,并构建风速预测模型;最后,以中国宝兰高铁沿线风速采集点采集的实测风速数据为例,对模型进行有效性检验。实验结果表明:SABO算法的寻优效果更加良好,预测精度更高,所建模型的平均绝对误差(mean absolute error,MAE)、平均绝对百分比误差(mean absolute percentage error,MAPE)和均方根误差(route mean square error,RMSE)分别仅为11.96%、1.23%和16.47%,决定系数(r-square,R^(2))为0.995。与其他模型相比,通过SABO算法优化后的LSTM神经网络在短期风速预测上具有较好的拟合效果和更高的预测精度,可为高铁沿线大风预测预警提供一种新的方法和思路。展开更多
In order to improve the accuracy of wind turbine fault diagnosis,a wind turbine fault diagnosis method based on Subtraction-Average-Based Optimizer(SABO)optimized Variational Mode Decomposition(VMD)and Kernel Extreme ...In order to improve the accuracy of wind turbine fault diagnosis,a wind turbine fault diagnosis method based on Subtraction-Average-Based Optimizer(SABO)optimized Variational Mode Decomposition(VMD)and Kernel Extreme Learning Machine(KELM)is proposed.Firstly,the SABO algorithm was used to optimize the VMD parameters and decompose the original signal to obtain the best modal components,and then the nine features were calculated to obtain the feature vectors.Secondly,the SABO algorithm was used to optimize the KELM parameters,and the training set and the test set were divided according to different proportions.The results were compared with the optimized model without SABO algorithm.The experimental results show that the fault diagnosis method of wind turbine based on SABO-VMD-KELM model can achieve fault diagnosis quickly and effectively,and has higher accuracy.展开更多
文摘准确的高铁沿线风速预测是铁路灾害预警系统的基础需求,为了提升应对和处理强风灾害致突发事件的能力,提出一种基于减法平均优化(subtraction average based optimizer,SABO)算法优化长短时记忆(long short-term memory,LSTM)神经网络的高铁沿线短期风速预测方法。首先,针对风速非线性和非平稳特性,采用极小化极大(min-max,MM)方法对风速数据进行归一化处理;其次,采用SABO算法中的“-v”方法对LSTM模型的关键参数搜索寻优,并构建风速预测模型;最后,以中国宝兰高铁沿线风速采集点采集的实测风速数据为例,对模型进行有效性检验。实验结果表明:SABO算法的寻优效果更加良好,预测精度更高,所建模型的平均绝对误差(mean absolute error,MAE)、平均绝对百分比误差(mean absolute percentage error,MAPE)和均方根误差(route mean square error,RMSE)分别仅为11.96%、1.23%和16.47%,决定系数(r-square,R^(2))为0.995。与其他模型相比,通过SABO算法优化后的LSTM神经网络在短期风速预测上具有较好的拟合效果和更高的预测精度,可为高铁沿线大风预测预警提供一种新的方法和思路。
文摘In order to improve the accuracy of wind turbine fault diagnosis,a wind turbine fault diagnosis method based on Subtraction-Average-Based Optimizer(SABO)optimized Variational Mode Decomposition(VMD)and Kernel Extreme Learning Machine(KELM)is proposed.Firstly,the SABO algorithm was used to optimize the VMD parameters and decompose the original signal to obtain the best modal components,and then the nine features were calculated to obtain the feature vectors.Secondly,the SABO algorithm was used to optimize the KELM parameters,and the training set and the test set were divided according to different proportions.The results were compared with the optimized model without SABO algorithm.The experimental results show that the fault diagnosis method of wind turbine based on SABO-VMD-KELM model can achieve fault diagnosis quickly and effectively,and has higher accuracy.
