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首页> 外文期刊>International Journal of Vehicle Noise and Vibration >Fault diagnosis of a diesel engine by using the analysis of instantaneous angular speed with a flexible model
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Fault diagnosis of a diesel engine by using the analysis of instantaneous angular speed with a flexible model

机译：利用瞬时模型分析瞬时角速度对柴油机的故障诊断

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摘要

Engine shaft instantaneous angular speed (IAS) can be used to diagnose combustion related faults and other faults affecting the output of engines, especially for small-scale diesel generators. Unfortunately, it is difficult to apply this technology to monitoring the operational condition of a marine propulsion diesel engine due to its complex shafting systems and multiple factors affecting the shafting torsional vibration. In this paper, the characteristics of fault detection based on traditional IAS analysis methods are firstly analysed. A novel method has been developed based on treating the engine shaft system as a flexible model, aiming to extend the IAS technique to monitor the working condition of a large marine diesel engine. Theoretical studies and engine evaluation tests have been conducted on a marine diesel engine experiment set-up. It is shown that an integration of the developed flexible model with traditional IAS technique is feasible and accurate.
机译：发动机轴瞬时角速度（IAS）可用于诊断与燃烧有关的故障以及其他影响发动机输出的故障，特别是对于小型柴油发电机而言。不幸的是，由于其复杂的轴系系统和影响轴系扭转振动的多种因素，很难将该技术用于监测船用推进柴油机的运行状况。本文首先分析了基于传统IAS分析方法的故障检测特征。基于将发动机轴系视为柔性模型，已经开发了一种新方法，旨在扩展IAS技术以监视大型船用柴油机的工作状态。在船用柴油机实验装置上进行了理论研究和发动机评估测试。结果表明，所开发的柔性模型与传统IAS技术的集成是可行和准确的。

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