维纳滤波器在燃烧噪声分离中的应用

董阳; 张良良; 高文志; 贺红; 付振

doi:10.13433/j.cnki.1003-8728.20220053

维纳滤波器在燃烧噪声分离中的应用

doi: 10.13433/j.cnki.1003-8728.20220053

董阳^1,,
张良良²,
高文志^1, ,,
贺红¹,
付振¹

1.
天津大学内燃机燃烧学国家重点实验室, 天津 300072
2.
广汽研究院, 广州 511400

详细信息

作者简介:
董阳(1997-), 硕士研究生, 研究方向为发动机燃烧噪声, Dyoung9715@163.com

通讯作者:
高文志, 教授, 博士生导师, gaowenzhi@tju.edu.cn

中图分类号: TK402
计量
- 文章访问数: 218
- HTML全文浏览量: 80
- PDF下载量: 88
- 被引次数: 0
出版历程
- 收稿日期: 2021-07-03
- 刊出日期: 2023-07-25

Application of Wiener Filter in Separating Combustion Noise

1.
State Key Laboratory of Engines, Tianjin University, Tianjin 300072, China
2.
GAC R & D CENTER, Guangzhou 511400, China

摘要

摘要: 目前分离内燃机燃烧噪声常用的方法主要有传递函数法、多元线性回归法，这两种方法均将内燃机的总噪声分为燃烧噪声和机械噪声两部分，并且假设实验获得的倒拖噪声为机械噪声，以此达到分离燃烧噪声的目的。然而上述两种方法所得到的燃烧噪声中还包含活塞敲击所形成的间接燃烧噪声。本研究测取了某汽油机转速为4 500 r/min和2 000 r/min转速下多个负荷工况的总噪声、缸压和振动数据，并利用-15~85 ℃A ATDC的时间窗对测量信号进行了截取，基于倒拖法将机械噪声分离。利用缸压信号和燃烧噪声信号构建了维纳滤波器对燃烧噪声进行了滤波，实现了直接燃烧噪声和间接燃烧噪声的分离。计算结果表明该汽油机活塞敲击产生的间接燃烧噪声主要集中于500~8 000 Hz的频率段。
- 汽油机 /
- 直接燃烧噪声 /
- 间接燃烧噪声 /
- 维纳滤波
Abstract: The most widely used noise-separating methods are transfer function method and multiple linear regression method. Both methods consider that the total engine′s noises include two categories, combustion and mechanical noises, by which the motor noise are hypothetically considered as mechanical noise. However noises from these two methods still comprise indirect combustion noise as a result of piston slapping as well. This research is conducted under the condition of 4 500 r/min and 2 000 r/min to acquire the total noises, cylinder pressure and vibration data of a gasoline engine, which also uses the time window of -15-85 ℃A ATDC to cut out the target signal and then separate the mechanical noise under motor test. The signal of cylinder pressure and combustion noise help to develop Wiener filter to apply to combustion noise so that it can achieve the separation between indirect and direct combustion noises. The result proves that most of the indirect noise are in the region of 500-8 000 Hz.
- gasoline engine /
- direct combustion noise /
- indirect combustion noise /
- Wiener filter

HTML全文

图 1 发动机噪声的形成

Figure 1. Formation of engine noise

下载: 全尺寸图片幻灯片

图 2 直接燃烧噪声分离示意图

Figure 2. Schematic diagram of direct combustion noise separation

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图 3 实验台架测试系统

Figure 3. Experimental bench test system

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图 4 4 500r/min转速下缸压频谱

Figure 4. 4 500 r/min cylinder pressure spectrum

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图 5 2 000r/min转速下缸压频谱

Figure 5. 2 000 r/min cylinder pressure spectrum

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图 6 4 500r/min转速下不同负荷工况维纳滤波结果

Figure 6. Wiener filtering results for different load conditions at 4 500 r/min

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图 7 2 000r/min转速下不同负荷工况维纳滤波结果

Figure 7. Wiener filtering results for different load conditions at 2 000 r/min

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图 8 4 500r/min工况下各负荷振动速度频谱计算结果

Figure 8. Vibration speed frequency spectrum calculation results under 4 500 r/min load conditions

下载: 全尺寸图片幻灯片

图 9 2 000r/min工况下各负荷振动速度频谱计算结果

Figure 9. Vibration speed frequency spectrum calculation results under 2 000 r/min load conditions

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表 1 实验汽油机主要参数

Table 1. Experimental gasoline engine parameters

项目	参数
发动机型式	增压汽油机
气缸数	4
排量/L	1.991
压缩比	11
点火顺序	1-3-4-2

下载: 导出CSV

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