一种基于残余网络和在时间变化的工作条件下门式循环单元的轴承故障诊断方法
Zheng Wang1, Xiaoyang Xu1, Yu Zhang1
1School of Mechanical and Electrical Engineering, Shandong Jianzhu University, Jinan 250101, China.
Sensors (Basel, Switzerland)
|August 12, 2023
概括
这项研究引入了一个新的ResNet-GRU模型,用于在变化速度和加速下诊断轴承故障. 该模型通过有效处理复杂的操作数据来实现高精度.
科学领域:
- 机械工程 机械工程
- 人工智能的人工智能
- 信号处理 信号处理
背景情况:
- 轴承故障对于机械设备的健康至关重要.
- 在时间变化的条件下 (速度,加速度) 诊断故障对于数据驱动模型来说是具有挑战性的.
- 像长期短期记忆 (LSTM) 这样的现有方法具有性能限制.
研究的目的:
- 开发一个准确的轴承故障诊断模型,以适应时间变化的操作条件.
- 为了克服叠加速度和加速度变化带来的困难.
- 提高现有的诊断模型的性能.
主要方法:
- 提出了一种新型模型,该模型结合了用于特征提取的剩余网络 (ResNet) 和用于信息处理的门反复单元 (GRU).
- 使用ResNet. 的样本细分和特征提取.
- 使用GRU和输出网络进行信息处理和分类.
- 使用t分布式静态邻居嵌入 (t-SNE) 进行尺寸缩小和层分析.
主要成果:
- 拟议的ResNet-GRU模型在时间变化的工作条件下显示出高故障诊断准确度.
- 该模型有效地忽略了加速的影响.
- 实验结果显示,与现有的轴承故障诊断方法相比,性能优越.
- t-SNE分析提供了关于特征维度和模型层贡献的见解.
结论:
- 结合的ResNet-GRU模型为在动态环境中进行轴承故障诊断提供了强大的解决方案.
- 这种方法提高了机械设备的诊断准确性和可靠性.
- 这些发现表明了先进状态监测和预测性维护的有希望的方向.
相关概念视频
01:18Fault Types
108
When analyzing a single line-to-ground fault from phase A to ground at a three-phase bus, it is important to consider the fault impedance. This impedance is zero for a bolted fault, equal to the arc impedance for an arcing fault, and represents the total fault impedance for a transmission-line insulator flashover. To derive sequence and phase currents, fault conditions are translated from the phase domain to the sequence domain.
For line-to-line faults occurring between phases B and C, the...
For line-to-line faults occurring between phases B and C, the...
108
01:25Multimachine Stability
191
Multimachine stability analysis is crucial for understanding the dynamics and stability of power systems with multiple synchronous machines. The objective is to solve the swing equations for a network of M machines connected to an N-bus power system.
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
In analyzing the system, the nodal equations represent the relationship between bus voltages, machine voltages, and machine currents. The nodal equation is given by:
191
01:26Reclosers and Fuses
129
Automatic circuit reclosers enhance the protection of distribution circuits by interrupting and auto-reclosing an AC circuit according to a preset sequence. They effectively manage temporary faults on overhead distribution lines, often caused by tree limbs or wildlife, by briefly disrupting service to improve overall reliability. However, contact with reclosers or energized broken conductors on the ground can pose serious hazards.
A comprehensive protection scheme for radial distribution...
A comprehensive protection scheme for radial distribution...
129
01:31Classification of Systems-II
177
Continuous-time systems have continuous input and output signals, with time measured continuously. These systems are generally defined by differential or algebraic equations. For instance, in an RC circuit, the relationship between input and output voltage is expressed through a differential equation derived from Ohm's law and the capacitor relation,
177
01:24Bus Impedance Matrix
146
Calculating subtransient fault currents for three-phase faults in an N-bus power system involves using the positive-sequence network. When a three-phase short circuit occurs at a specific bus, the analysis uses the superposition method to evaluate two separate circuits.
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
In the first circuit, all machine voltage sources are short-circuited, leaving only the prefault voltage source at the fault location. The positive-sequence bus impedance matrix can be determined by solving the nodal equations,...
146
01:22Series R—L Circuit Transients
121
In a series resistor-inductor (R-L) circuit, closing the switch at the start of the time period simulates a three-phase short circuit, a fault condition where all three phases of an unloaded synchronous machine are short-circuited. When there is no fault impedance and no initial current, the initial voltage is determined by the phase angle of the source voltage.
Using Kirchhoff's Voltage Law (KVL) to analyze this circuit helps determine the total asymmetrical fault current, which consists...
Using Kirchhoff's Voltage Law (KVL) to analyze this circuit helps determine the total asymmetrical fault current, which consists...
121