ID | 原文 | 译文 |
39426 | 针对双馈式风电机组发电机前轴承劣化趋势问题,提出了一种新的组合建模方法对发电机前轴承健康度进行趋势预测。 | Aiming at the deterioration trend of front bearing of doubly-fed wind turbine generator, a new combined modeling method is proposed to predict health degree of front bearing of generator. |
39427 | 采用高斯混合模型(Gaussian Mixture Model, GMM)对机组运行工况进行辨识,并在各个子工况内分别建立基于极限学习机(Extreme Learning Machine, ELM)的发电机前轴承温度模型,将温度残差特征与前轴承振动信号时频域特征相融合,并计算前轴承健康度,提出基于注意力机制的双向长短期记忆(Bi-directional Long Short Term Memory, Bi-LSTM)神经网络对前轴承健康度进行建模并预测其趋势。 | The GMM is used to identify operating conditions of wind turbines. The temperature model of front bearing based on ELM is established respectively in each sub-condition. Combining with temperature residual characteristics and time-frequency characteristics of vibration signal, the health degree of front bearing is calculated. Based on attention mechanism, the Bi-LSTM neural network is proposed to model and predict health degree of front bearing. |
39428 | 实验结果表明:该组合建模方法具有较高的准确度和泛化能力。 | The result shows that the combined modeling method has high accuracy and generalization ability. |
39429 | 针对小样本数据缺失下的设备故障诊断问题,提出基于遗传算法优化支持向量回归的缺失数据填补方法,以改善设备故障诊断效果。 | In view of the equipment fault diagnosis with small and missing sample data, a method of missing data filling based on support vector regression optimized by genetic algorithm is proposed to improve the accuracy of equipment fault diagnosis. |
39430 | 利用缺失数据所属变量的数据,训练遗传算法优化的支持向量回归,得到单变量预测结果; | The support vector regression optimized by genetic algorithm was trained by other data values of missing data, and univariate prediction results were obtained. |
39431 | 通过相关性分析重构训练集,获得多变量预测结果。 | The training set was reconstructed through correlation analysis, so as to obtain the multivariate prediction results. |
39432 | 建立动态权重将单变量预测与多变量预测的结果相组合,对缺失数据进行填补。 | Dynamic weights were established to combine univariate prediction results and multivariate prediction results to fill in the missing data. |
39433 | 将完整的数据作为输入,利用支持向量机对设备进行故障诊断。 | The complete data is taken as the input, and the equipment fault is diagnosed by support vector machine. |
39434 | 实例分析表明,所提出的方法具有较佳的故障诊断效果。 | Example analysis shows that the method proposed in this paper has a high fault diagnosis accuracy. |
39435 | 为了缩短航天维修人员的培训时间,提高维修人员的操作熟练度,设计开发了一款基于桌面虚拟现实设备的航天器维修仿真系统, | In order to shorten the training period of aerospace maintenance personnel and improve their operation proficiency, a spacecraft maintenance simulation system based on the desktop virtual reality technology is designed and developed. |