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齿轮故障诊断技术研究 被引量:6
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作者 涂旭欣 吴胜利 简晓春 《自动化仪表》 CAS 2020年第2期14-19,共6页
齿轮故障诊断技术的本质是通过观察及分析齿轮不同状态理化性质变化,达到判别齿轮故障的效果。其研究目的是实现齿轮故障早发现、准诊断,提升各型设备的加工水平及使用寿命。传统的油样分析技术通过设备用润滑油的磨屑情况分析,判断齿... 齿轮故障诊断技术的本质是通过观察及分析齿轮不同状态理化性质变化,达到判别齿轮故障的效果。其研究目的是实现齿轮故障早发现、准诊断,提升各型设备的加工水平及使用寿命。传统的油样分析技术通过设备用润滑油的磨屑情况分析,判断齿轮工作状态。其优势是检出限低,可以把握微米级磨损变化。但是其不具备实时性,且需要人为观察,判别较为繁琐。采用齿轮振动信号进行故障诊断是目前较为常见的另一种诊断方法。通过加速度传感器对齿轮振动信号进行采集,在利用包括传统时域及频域分析在内的多种分析手段,对齿轮故障情况进行判别。其具备不开箱、成本低、时实性强等优点,但其检出限较高。分析基于振动信号的故障诊断办法,在介绍常见时域及频域分析基础上,引出基于特向选择、特向优化且与分类函数结合的先进齿轮故障判别方法。基于稀疏滤波的特向优化技术是目前基于振动信号进行齿轮故障诊断的发展方向。 展开更多
关键词 齿轮故障诊断 油样分析技术 磨屑加速度传感器 振动信号 分类函数 稀疏滤波 特向优化
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NEURAL NETWORK REALIZATION OF STRUCTURAL VIBRATION CONTROL USING MR DAMPER
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作者 周丽 张志成 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2001年第2期144-150,共7页
Magnetorheological (MR) dampers are one of the most promising new devices for civil infrastructural vibration control applications. However, due to their highly nonlinear dynamic behavior, it is very difficult to obta... Magnetorheological (MR) dampers are one of the most promising new devices for civil infrastructural vibration control applications. However, due to their highly nonlinear dynamic behavior, it is very difficult to obtain of a mathematical model of inverse MR damper that has an explicit relationship between the desired damper force and the command signal (voltage). This force voltage relationship is especially required for the structural vibration control design and simulation using MR dampers. This paper focuses on using a neural network (NN) technique to emulate the inverse MR damper model. The output of the neural network can be used to command the MR damper for generating desired forces. Numerical simulations are also presented to illustrate the effectiveness of this inverse model in semi active vibration control using MR dampers. 展开更多
关键词 magnetorhelogical damper neural networks optimal control inverse dynamics
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