This paper provides an overview of the recent advances made in the field of fault diagnosis of industrial machines operating under variable speed conditions. First, the shortcomings of the traditional techniques in extracting reliable fault information are laid down, followed by a discussion on the different approaches adopted to overcome these issues. Next, these approaches are discussed by categorizing them as resampling based and resampling free methods. The principle and implementation procedures of these methods are discussed by summarizing the key literature in this area. Finally, the paper is concluded by highlighting the future challenges to address in this area.

中文翻译：

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变速操作工业机械的故障诊断概述

本文概述了在变速条件下运行的工业机械的故障诊断领域中的最新进展。首先，阐述了传统技术在提取可靠故障信息中的缺点，然后讨论了克服这些问题所采用的不同方法。接下来，通过将这些方法归类为基于重采样的方法和无重采样的方法来讨论这些方法。通过总结该领域的关键文献，讨论了这些方法的原理和实现过程。最后，本文着重强调了该领域需要解决的未来挑战。