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Vibration based condition monitoring of a multistage epicyclic gearbox in lifting cranes

机译：起重机中基于振动的多级行星齿轮箱状态监测

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This paper proposes a model-based technique for detecting wear in a multistage planetary gearbox used by lifting cranes. The proposed method establishes a vibration signal model which deals with cyclostationary and autoregressive models. First-order cyclostationarity is addressed by the analysis of the time synchronous average {TSA) of the angular resampled vibration signal. Then an autoregressive model (AR) is applied to the TSA part in order to extract a residual signal containing pertinent fault signatures. The paper also explores a number of methods commonly used in vibration monitoring of planetary gearboxes, in order to make comparisons. In the experimental part of this study, these techniques are applied to accelerated lifetime test bench data for the lifting winch. After processing raw signals recorded with an accelerometer mounted on the outside of the gearbox, a number of condition indicators (C/s) are derived from the TSA signal, the residual autoregressive signal and other signals derived using standard signal processing methods. The goal is to check the evolution of the CIs during the accelerated lifetime test {ALT). Clarity and fluctuation level of the historical trends are finally considered as a criteria for comparing between the extracted CIs. This study reveals the most relevant features to be used for damage detection and condition monitoring of the gear system. It is also shown that the proposed procedure using a combination of cyclostationarity and autoregressive modeling enhance the ability to detect and diagnose mechanical wear in multi-staged planetary gears.
机译：本文提出了一种基于模型的技术，用于检测起重起重机使用的多级行星齿轮箱中的磨损。所提出的方法建立了处理循环平稳和自回归模型的振动信号模型。一阶循环平稳性是通过对角度重采样振动信号的时间同步平均值（TSA）进行分析来解决的。然后将自回归模型（AR）应用于TSA零件，以提取包含相关故障特征的残差信号。本文还探索了行星齿轮箱振动监测中常用的许多方法，以进行比较。在本研究的实验部分，这些技术被应用于提升绞盘的加速寿命试验台数据。在使用安装在齿轮箱外部的加速度计处理原始信号后，从TSA信号，残余自回归信号和其他使用标准信号处理方法得出的信号中得出许多状态指示器（C / s）。目的是检查加速寿命测试（ALT）期间CI的演变。最后，将历史趋势的清晰度和波动水平作为在提取的CI之间进行比较的标准。这项研究揭示了最相关的功能，可用于齿轮系统的损坏检测和状态监视。还表明，将循环平稳性和自回归建模相结合的拟议程序增强了检测和诊断多级行星齿轮中机械磨损的能力。

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