请润色一下内容 实验中采用的滚动轴承数据来自美国凯斯西储大学轴承数据库很多故障诊断领域的专家学者在进行实验研究时都采用此数据集4344。轴承试验平台如图4-1所示主要包括三部分左侧的15kw的３相感应电机通过自较准联轴器与中间的压力传感器编码器相连右侧是一个功率测试计电机的负载由风机来调节轴承运行在0、1、2、3马力的负载下分别对应1797rmin、1772rmin、1750rmin、1730rm

The data used in the experiment on rolling bearings was obtained from the bearing database of Case Western Reserve University in the United States, which is often utilized by experts and scholars in the field of fault diagnosis research [43,44]. The bearing test platform is shown in Figure 4-1, and consists of three main parts. The 1.5 kW three-phase induction motor on the left is connected to the pressure sensor/encoder in the middle via a self-aligning coupling. The power test device on the right adjusts the motor load using a fan. The bearing runs under a load of 0, 1, 2, and 3 horsepower, corresponding to four speeds of 1797 rpm, 1772 rpm, 1750 rpm, and 1730 rpm, respectively. The sensor is fixed on the housing above the drive-end bearing for data collection.

To obtain the vibration signals of the rolling bearings under different faults, the bearings were machined into single-point faults using the electric spark method. Faults were created on the inner ring, outer ring, and rolling elements of the 6205-2RSJEMSKF deep groove ball bearing used in the experiment, with fault diameters of 0.18 mm, 0.36 mm, and 0.54 mm. The sampling frequency was 12 kHz, and the sampled data was located on the drive end.

The experiment consisted of four sets of data, divided into two groups, with the inner ring fault bearing and outer ring fault bearing as the experimental objects, respectively. For each group, two sets of data were analyzed and compared, with different speeds and damage diameters selected. All selected data were normalized for convenience of observation. Table 4-1 shows the bearing dimension information.