Teager能量算子(Teager Energy Operator,简称TEO)可通过计算信号能量的方式凸显信号中的瞬态信息,在轴承故障诊断中的应用极为广泛。然而,TEO处理低信噪比信号时,其性能明显下降。针对该问题,提出引入多分辨率参数,用于机车轴承微弱故...Teager能量算子(Teager Energy Operator,简称TEO)可通过计算信号能量的方式凸显信号中的瞬态信息,在轴承故障诊断中的应用极为广泛。然而,TEO处理低信噪比信号时,其性能明显下降。针对该问题,提出引入多分辨率参数,用于机车轴承微弱故障特征提取。设置多分辨率参数m构造多分辨率Teager能量算子(Multiresolution Teager Energy Operator,简称MTEO);利用MTEO计算信号总能量获得信号能量谱,从信号能量的角度消除噪声、增强故障信息;对能量谱包络谱分析获得诊断结果。仿真数据、实验室数据和工程数据验证了该方法的有效性,通过与TEO方案对比,表明MTEO方法能够改善TEO的应用效果,提升轴承微弱故障识别率。展开更多
This paper proposes a self-adaptive approach to converting irregular genus-O meshes into those with subdivision connectivity. To assure a maximal utilization of the multiresolution techniques on the remesh, we map the...This paper proposes a self-adaptive approach to converting irregular genus-O meshes into those with subdivision connectivity. To assure a maximal utilization of the multiresolution techniques on the remesh, we map the original mesh onto the unit sphere and construct a base mesh with only four vertices. We also introduce a self-adaptive relocation operation, which is used to adapt the vertex distribution of the spherical subdivision mesh to that of the parameterized mesh, to improve the visual appearance of the remesh. The experimental results show that our method can not only make the number of irregular vertices in the remesh as small as possible, but also preserve the details of the original mesh well.展开更多
文摘Teager能量算子(Teager Energy Operator,简称TEO)可通过计算信号能量的方式凸显信号中的瞬态信息,在轴承故障诊断中的应用极为广泛。然而,TEO处理低信噪比信号时,其性能明显下降。针对该问题,提出引入多分辨率参数,用于机车轴承微弱故障特征提取。设置多分辨率参数m构造多分辨率Teager能量算子(Multiresolution Teager Energy Operator,简称MTEO);利用MTEO计算信号总能量获得信号能量谱,从信号能量的角度消除噪声、增强故障信息;对能量谱包络谱分析获得诊断结果。仿真数据、实验室数据和工程数据验证了该方法的有效性,通过与TEO方案对比,表明MTEO方法能够改善TEO的应用效果,提升轴承微弱故障识别率。
文摘This paper proposes a self-adaptive approach to converting irregular genus-O meshes into those with subdivision connectivity. To assure a maximal utilization of the multiresolution techniques on the remesh, we map the original mesh onto the unit sphere and construct a base mesh with only four vertices. We also introduce a self-adaptive relocation operation, which is used to adapt the vertex distribution of the spherical subdivision mesh to that of the parameterized mesh, to improve the visual appearance of the remesh. The experimental results show that our method can not only make the number of irregular vertices in the remesh as small as possible, but also preserve the details of the original mesh well.
