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Robust Bearing Performance Degradation Assessment Method Based On Improved Wavelet Packet- Support Vector Data Description

机译:基于改进小波包支持向量数据描述的鲁棒轴承性能退化评估方法

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Bearing performance degradation assessment is one of the most important techniques in proactive maintenance aiming to realize equipment's near-zero downtime and maximum productivity. In this paper, we propose a new robust method for it based on improved wavelet packet decomposition (IWPD) and support vector data description (SVDD). A health index is designed based on general distance. Node energies of IWPD are used to compose feature vectors. Based on feature vectors extracted from normal signals, a SVDD model fitting a tight hypersphere around them is trained, the general distance of test data to this hypersphere is used as the health index. Research results of its application in a bearing accelerated life test show that this health index can reflect effectively bearing performance degradation comparing with many other parameters.
机译:轴承性能退化评估是主动维护中最重要的技术之一,旨在实现设备的近零停机时间和最大生产率。在本文中,我们基于改进的小波包分解(IWPD)和支持向量数据描述(SVDD)提出了一种新的鲁棒方法。健康指数是根据一般距离设计的。 IWPD的节点能量用于组成特征向量。根据从正常信号中提取的特征向量,训练一个适合其周围紧密超球面的SVDD模型,并将测试数据到该超球面的一般距离用作健康指标。其在轴承加速寿命试验中的应用研究结果表明,与许多其他参数相比,该健康指数可以有效地反映轴承性能的下降。

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