内时钟采集时域缸压信号转角度域的方法

摘要/Abstract

摘要：

摘要：提出一种缸内压力信号测试新方法.该方法无需在发动机自由端安装角标器，仅需在飞轮端安装传感器获得飞轮齿圈信号即可，且易于安装.利用高速内时钟数据采集卡同时测试缸内压力信号及齿圈信号，通过Newton插值算法得到齿圈信号过零点的精确时刻；基于发动机在飞轮齿圈转过1个齿的时间内转速恒定的假设，在每个齿内通过插值运算，将时间域的缸内压力信号转化为角度域信号.实验结果表明,提出的方法工作可靠，数据处理的结果满足燃烧过程分析的需要.

关键词: 缸内压力, 内时钟采样, Newton插值, 时域信号, 角度域信号

Abstract:

Abstract： A novel method for measurement of incylinder pressure signal is proposed in this paper. There is no need to install angle encoder at the free end of the engine but to install pulse sensors at flywheel end to obtain wheel gear signal. The cylinder pressure and wheel gear signal are sampled using the high speed internal clock data acquisition card. The zero crossing points of wheel gear signal are calculated using the Newton interpolation algorithm. Based on the assumption that the instantaneous speed of engine is unchangeable during adjacent gears, the cylinder pressure measured in the timedomain is converted to the angledomain using the interpolation algorithm. The method is verified by an experiment, and results show that the method is reliable and able to fulfill the requirement of combustion analysis.

Key words: cylinder pressure, internal clock sampling, Newton interpolation, time domain signal, angle domain signal

中图分类号:

TK 43

纪少波,赵盛晋,程勇,王洋,赵秀亮,李新海. 内时钟采集时域缸压信号转角度域的方法[J]. 上海交通大学学报（自然版）, 2017, 51(1): 57-.

JI Shaobo,ZHAO Shengjin,CHENG Yong,WANG Yang,ZHAO Xiuliang,LI Xinhai. A Method for Transform of Pressure Signal from Time Domain to Angle Domain Based on Internal Clock Sampling[J]. Journal of Shanghai Jiaotong University, 2017, 51(1): 57-.

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