柴油发动机是船舶动力来源，其运行可靠性对于船舶至关重要。由于柴油发动机结构复杂，存在大量的摩擦和配合元件，当柴油机出现拉缸等异常故障时，其运行过程的振动信号会出现异常。本文研究的核心是利用改进共振解调技术和小波分析理论对船舶柴油机的振动信号进行采集和分析，设计一种在线式的船舶柴油机振动监测系统，建立柴油机摩擦磨损模型，详细介绍了在线式柴油机振动监测系统的构成和工作原理。
The marine diesel engine is its power source, and its operation reliability is very important for the ship. Due to the complex structure of the diesel engine, there are a large number of friction and matching components. When the diesel engine has abnormal faults such as cylinder pulling, the vibration signal during its operation will be abnormal. The core of this paper is to use the improved resonance demodulation technology and wavelet analysis theory to collect and analyze the vibration signals of marine diesel engine, establish an online vibration monitoring system of marine diesel engine, establish the friction and wear model of diesel engine, and introduce the composition and working principle of online vibration monitoring system of diesel engine in detail.
2022,44(15): 105-108 收稿日期：2022-01-30
DOI：10.3404/j.issn.1672-7649.2022.15.021
分类号：U654.25
基金项目：中国交通教育研究会重点课题（JTZD20-62）
作者简介：李勇(1976-)，男，硕士，讲师，研究方向为轮机工程及海事教育
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