Army Artillery and Air Defense Forces Academy, Zhengzhou 450052, China
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文章历史+
Received
Published
Revised
2025-04-15
2026-04-18
2025-07-27
Online Date
2026-06-08
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摘要
在大型装备及复杂系统的过程监控中,噪声干扰与非平稳数据特性会影响传统故障检测方法的性能,往往导致检测效果不佳。为了解决此问题,提出一种结合全局包络预处理与改进偏最小二乘算法的故障检测方法。首先采用滑动平均与滑动标准差构造全局包络线,在抑制噪声的同时确定信号波动的合理范围;然后在PLS(partial least squares)算法中加入标准差加权项,提高对数据瞬态特征的检测能力;最后在两个空间中设计统计量,实现实时在线监测。在模拟故障数据集和青霉素发酵过程中验证了方法的有效性且没有检测延迟;并通过田纳西-伊斯曼过程中的对比实验提高了质量相关故障检测率,验证了方法的优越性。研究表明,该方法为复杂环境下高噪声、非平稳过程的故障检测提供了有效的技术手段,具有重要的工程应用价值。
Abstract
In industrial process monitoring of large-scale equipment and complex systems, conventional fault detection methods are significantly impaired by noise interference and non-stationary data characteristics, which leads to unsatisfactory diagnostic performance. To address these challenges, an innovative fault detection framework was proposed, integrating global envelope preprocessing with an improved partial least squares (PLS) algorithm. First, global envelopes were constructed through moving average calculation and moving standard deviation analysis to suppress noise while preserving legitimate signal fluctuations. Subsequently, a standard deviation-weighted term was incorporated into the PLS formulation to enhance transient feature sensitivity. Finally, dual-domain statistical metrics were developed in both residual and original feature spaces to enable real-time online monitoring. The method's efficacy was validated through experiments on both simulated fault datasets and penicillin fermentation processes, demonstrating zero detection latency; furthermore, comparative experiments on the Tennessee Eastman process significantly improved the detection rate of quality-related faults, confirming the method's superiority. The research demonstrates that this method provides an effective technical solution for fault detection in complex environments with high noise and non-stationary processes, offering significant engineering application value.
WANG Xiao-bing, ZHAO Yao, JIA Wei-jian, ZHOU Guo-jian.
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Science Technology and Engineering, 2026, 26(11): 4722-4731 DOI:10.12404/j.issn.1671-1815.2502685
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