| 用低通滤波法处理内燃机缸内流动的LDA测量数据 |
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| 引用本文： | 李玉峰,刘书亮,史绍熙,许振忠.用低通滤波法处理内燃机缸内流动的LDA测量数据[J].工程热物理学报,1998(4). |
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| 作者姓名： | 李玉峰 刘书亮 史绍熙 许振忠 |
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| 作者单位： | 天津大学内燃机燃烧学国家重点实验室!天津，300072，天津大学内燃机燃烧学国家重点实验室!天津，300072，天津大学内燃机燃烧学国家重点实验室!天津，300072，天津大学内燃机燃烧学国家重点实验室!天津，300072 |
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| 基金项目： | 国家八五攀登计划资助，国家自然科学基金 |
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| 摘 要： | 本文根据内燃机缸内流动的LDA测量数据的特点，讨论了低通滤波过程、数据预处理过程、截止频率的选择、数据处理误差等，论述了在目前LDA测量数据率还不够高的情况下，如何较好地用低通滤波法对LDA测量数据进行单一循环分析处理，最大限度地减少数据处理误差．
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| 关 键 词： | 低通滤波 LDA单一循环测量法 缸内空气流动 内燃机 |
ANALYZING LDA MEASUREMENT DATA OF IN-CYLINDER AIR FLOW IN AN INTERNAL COMBUSTION ENGINE BY USING LOW-PASS FILTER |
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| LY Yufeng, LIU Shuliang, SHI Shao-Xi ,XU Zhenzhong.ANALYZING LDA MEASUREMENT DATA OF IN-CYLINDER AIR FLOW IN AN INTERNAL COMBUSTION ENGINE BY USING LOW-PASS FILTER[J].Journal of Engineering Thermophysics,1998(4). |
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| Authors: | LY Yufeng LIU Shuliang SHI Shao-Xi XU Zhenzhong |
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| Abstract: | In this paper, according to the feature of LDA measurement data of in-cylinder air flow in an internal combustion engine, the authors discussed the method of low-pass filter, the work of data pre-process, the selection of cut-off frequency and the errors in data processing,and illustrated how to obtain a better result of cycle-resolved analysis by using low-pass filter under the condition of not enough high LDA data rate. |
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| Keywords: | low-pass filter cycle-resolved LDA measurement in-cylinder air flow internal combustion engine |
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