对于具有多种故障模式的电动驱动系统,非线性降解建模和剩余使用寿命预测
Zhen Wang1,2, Yadong Li3, Shuishi Li3
1School of Artificial Intelligence, Henan University, Zhengzhou, 450046, Henan, China. wangzhenares@yeah.net.
Scientific reports
|November 6, 2025
概括
本研究引入了一个新的框架,用于预测电动驾驶系统 (EDS) 的剩余使用寿命 (RUL). 该方法准确地模拟了退化和多重故障模式,改善了可靠性评估.
科学领域:
- 工程 工程师 工程师 工程师
- 可靠性工程可靠性工程
- 数据科学数据科学数据科学
背景情况:
- 对电动驾驶系统 (EDS) 的准确剩余使用寿命 (RUL) 预测对于可靠性和健康管理至关重要,特别是在多种故障模式下.
- 现有的方法经常与非线性降解和复杂系统固有的不确定性作斗争.
研究的目的:
- 为EDS开发一个综合框架,用于复合健康指标构建,非线性降解建模和RUL预测.
- 通过结合元件损坏,故障值和操作频谱来提高RUL预测的准确性和稳定性.
- 提供可靠的方法来量化RUL预测中的不确定性.
主要方法:
- 利用重法创建一个综合健康指标,整合各种故障模式的损害.
- 开发了EDS的非线性降解模型,通过全生命周期的基板测试来确定故障值和不确定性.
- 整合了一个加速因子,并使用贝叶斯参数更新方法用于RUL预测和不确定性量化.
主要成果:
- 在约20%的使用寿命后,在10%以内实现预测错误.
- 证明积累历史数据稳定了模型参数,并集中了RUL概率分布.
- 在比较实验中,与维纳和CNN-LSTM模型相比,显示出更高的稳定性和准确性.
结论:
- 拟议的综合框架为具有多种故障模式的电动驾驶系统 (EDS) 提供了准确而强大的RUL预测.
- 该方法为可靠性评估和复杂系统的智能操作和维护提供了宝贵的技术支持.
- 贝叶斯更新方法有效量化不确定性,随着数据的增长,提高预测的可靠性.
更多相关视频
06:45Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
Published on: October 28, 2022
2.1K
10:41The Effect of Charging and Discharging Lithium Iron Phosphate-graphite Cells at Different Temperatures on Degradation
Published on: July 18, 2018
16.0K
相关概念视频
01:25Multimachine Stability
537
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:
537
01:21Fatigue
787
Fatigue occurs when materials rupture under repeated or fluctuating loads, even at stress levels far below their static breaking strength. It typically results in brittle failure, even for ductile materials. It is a critical consideration in designing machines and structural components subjected to repetitive or varying loads. The nature of these loadings can range from fluctuating loads like unbalanced pump impellers causing vibrations to repeatedly bending a thin steel rod wire back and forth...
787
01:30Simplified Synchronous Machine Model
736
The Synchronous Machine Model is a fundamental tool in analyzing and ensuring the transient stability of power systems. This model simplifies the representation of a synchronous machine under balanced three-phase positive-sequence conditions, assuming constant excitation and ignoring losses and saturation. The model is pivotal for understanding the behavior of synchronous generators connected to a power grid, particularly during transient events.
In this model, each generator is connected to a...
In this model, each generator is connected to a...
736
01:26Linear Approximation in Frequency Domain
338
Linear systems are characterized by two main properties: superposition and homogeneity. Superposition allows the response to multiple inputs to be the sum of the responses to each individual input. Homogeneity ensures that scaling an input by a scalar results in the response being scaled by the same scalar.
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
338
01:15Design of Transmission Shafts - Stress Analysis
704
Designing a transmission shaft requires a thorough understanding of the stresses induced by bending moments and torques, especially in systems where power is transferred through gears. These forces create force-couple systems at the centers of the shaft's cross-sections, leading to both transverse and torsional loading. Although shearing stresses from transverse loads are typically smaller than those from torques and are often overlooked, the significant normal stresses from these loads...
704
01:20Plastic Deformation in Circular Shafts
433
When materials are subjected to forces that surpass their yield strength, they undergo a process known as plastic deformation. This results in a permanent alteration or strain in their structure. This concept can be specifically applied to circular shafts, where the deformation leads to a change in its shape. The precise evaluation of this plastic deformation requires understanding the stress distribution within the circular shaft, which is achieved by calculating the maximum shearing stress in...
433