This paper explores the application of a liquid circular angular accelerometer (LCAA) in incipient bearing fault diagnosis. First, a wireless instantaneous angular acceleration (IAA) signal acquisition system is designed to collect motor IAA under various bearing fault conditions. Then, the IAA characteristics of the motor with both healthy bearings and incipient bearing faults are analyzed, which provides valuable insights into fault diagnosis method design. The proposed method implements an advanced signal preprocessing technique, which is developed based on self-adaptive noise cancellation (separates discrete frequency noises), minimum entropy deconvolution (enhances the fault-related components), and a novel approach of sliding time-window analysis to improve reliability. Hereafter, IAA-based estimated fault characteristic frequencies are identified in the envelope spectra of the post-processed data, which finalizes the bearing fault diagnosis. Simulation and experimental results substantiate the effectiveness of the proposed approach for early fault detection, even under the conditions of low sampling rates.

Simai Wang

Meiling Wang

Zifeng Gong

Hans Hallez

Dries Vanoost

Measurement

邀请对测量和仪器科学与技术各个领域的新成果进行投稿。鼓励作者提交新颖材料，其最终目标是在以下领域取得进步：测量和计量基础、传感器、测量仪器、测量和估计技术、测量数据处理和融合算法、评估程序和工厂方法和工业过程，系统、过程和算法的性能分析，面向测量的数学模型，互联世界中的分布式测量系统。

This journal invites submissions of new findings in all areas of measurement and instrumentation science and technology. We encourage authors to submit innovative materials aimed at advancing progress in the following fields: fundamentals of measurement and metrology, sensors, measuring instruments, measurement and estimation techniques, measurement data processing and fusion algorithms, evaluation procedures and factory methods, performance analysis of industrial processes, mathematical models for measurement, and distributed measurement systems in a connected world.

本期刊欢迎对测量和仪器科学与技术各个领域的新成果进行投稿。我们鼓励作者提交新颖的研究材料，旨在推动以下领域的进步：测量和计量基础、传感器、测量仪器、测量和估计技术、测量数据处理与融合算法、评估程序与工厂方法、工业过程的性能分析、面向测量的数学模型，以及在互联世界中的分布式测量系统。

Category	Quartile
工程技术	2
工程技术, 工程综合	2
工程技术, 仪器仪表	2

Liquid circular angular accelerometer-based incipient bearing fault diagnosis

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Category	Quartile
INSTRUMENTS & INSTRUMENTATION	1