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Abstract

Industrial pump systems require real-time fault diagnosis for predictive maintenance, but conventional Chain-of-Thought (COT) reasoning faces computational bottlenecks when processing high-frequency vibration data. This paper proposes Vibration-Aware COT (VA-COT), a novel framework that integrates multi-domain feature fusion (time, frequency, time–frequency) with adaptive reasoning depth control. Key innovations involve expert prior-guided dynamic feature selection to optimize edge-device inputs, complexity-aware reasoning chains reducing computational steps by 40–65% through confidence-based early termination, and lightweight deployment on industrial ARM-based single-board computers (SBCs). Evaluated on a 12-class pump fault dataset (5400 samples from centrifugal/gear pumps), VA-COT achieves 93.2% accuracy surpassing standard COT (89.3%) and CNN–LSTM (Convolutional Neural Network-Long Short-Term Memory network) (91.2%), while cutting latency to <1.1 s and memory usage by 65%. Six-month validation at pump manufacturing facilities demonstrated 35% maintenance cost reduction and 98% faster diagnostics versus manual methods, proving its viability for IIoT (Industrial Internet of Things) deployment.

Details

1009240
Business indexing term
Title
Temporal-Aware Chain-of-Thought Reasoning for Vibration-Based Pump Fault Diagnosis
Author
Zeng Jinchao 1 ; Li, Zicheng 1 ; Zheng Zuopeng 2 ; Lin Qizhe 1 

 College of Mechanical and Electrical Engineering, Wenzhou University, Wenzhou 325035, China; [email protected] (J.Z.); [email protected] (Z.L.) 
 Zhejiang TONGLI Transmission Technology Co., Ltd., Ruian 325205, China 
Publication title
Processes; Basel
Volume
13
Issue
8
First page
2624
Number of pages
24
Publication year
2025
Publication date
2025
Publisher
MDPI AG
Place of publication
Basel
Country of publication
Switzerland
Publication subject
e-ISSN
22279717
Source type
Scholarly Journal
Language of publication
English
Document type
Journal Article
Publication history
 
 
Online publication date
2025-08-19
Milestone dates
2025-07-23 (Received); 2025-08-13 (Accepted)
Publication history
 
 
   First posting date
19 Aug 2025
ProQuest document ID
3244057786
Document URL
https://www.proquest.com/scholarly-journals/temporal-aware-chain-thought-reasoning-vibration/docview/3244057786/se-2?accountid=208611
Copyright
© 2025 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.
Last updated
2025-09-23
Database
ProQuest One Academic