一种基于二次曲线拟合的冲击峰值计算方法

A Novel Calculation Method for Peak of Impulse Waveforms Based on Parabola Curve-fitting

针对半正弦冲击波形峰值的计算，提出了二次曲线拟合算法。通过截取部分峰值波形拟合计算获得峰值，有简捷、收敛的特点，并可通过拟合残差有效值判定拟合效果的优劣。该方法直接使用原始数据计算，无须滤波，可获得更加客观准确的结果。通过校准实验波形计算并与以往方法比较，验证了该方法的有效性和可行性。

A novel calculation method based on parabola curve - fitting is presented for peak calculation. Through taking out the waveform near impulse peak from acquisition data, the impulse peak value is got by using parabola curve - fitting. The method has the specialties of easy to use, good convergence, and so on. By the error of curve -fitting, the different curve-fitting results can be compared. In this method, the sampling data are used to calculate the impulse peak directly, so, there is no affects and influence of filters, and it can attain the more precise and impersonal peak results. In a group of impulse calibration experiments, and through compared with traditional method, both the correctness and the feasibility of the pulse peak calculation method are proved.