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Correcting Distortion in Acoustic Sense Lines

机译:校正声感线中的失真

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Pressure sense lines, as employed in the measurement of rocket engine test firings, can propagate the time-domain pressure signal out of hostile regions and allow instrumentation with pressure transducers. In such applications, it is necessary to correct the data to account for attenuation and resonance due to the sense line. One technique for doing so is the application of Fourier transform theory to obtain the transfer function of the sense line. Various techniques for obtaining the transfer function are explored, including the use of Gaussian noise, single frequency sweeps, and impulse signals as input functions. The transfer function thus obtained is mathematically fit, scaled, and validated against a related system.
机译:在火箭发动机测试点火的测量中采用的压力传感线可以将时域压力信号传播到敌对区域之外,并允许使用压力传感器进行检测。在这种应用中,有必要校正数据以解决由于感测线引起的衰减和谐振。一种这样做的技术是应用傅里叶变换理论来获得感测线的传递函数。探索了获得传递函数的各种技术,包括使用高斯噪声,单频扫描和脉冲信号作为输入函数。由此获得的传递函数在数学上适合,缩放并针对相关系统进行了验证。

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