飞机着陆冲击响应谱分析

Analysis of Shock Response Spectrum for Aircraft Landing

相比大多文献采用的改进递归滤波器方法,利用拉普拉斯定理建立的冲击响应谱(SRS)模型,物理意义明确,易于工程人员理解应用。本文利用斜波响应不变法得到冲击谱数字滤波器系数,编写冲击响应谱计算软件。利用典型的冲击脉冲信号对软件进行算法验证,最后利用软件对固定翼飞机着陆数据进行冲击响应谱计算和分析。结果表明,该软件可以快速、精确地计算出冲击响应谱,为准确评估机载设备的抗冲击特性及减振防冲设计,提供了便捷的工具。

Compared to lots of the literature using the improved method of recursive filter,shock response spectrum(SRS) model based on Laplace theorem was much more easier for engineer to understand physical meaning and apply in the engineering.Using ramp response method digital filter coefficients were obtained,and on the basis the calculation software of shock response spectrum was programmed.The software was tested through analysis typical signal shock response spectrum,and then fixed-wing aircraft landing data were calculated and analyzed.The results show that the software can quickly and accurately calculate the shock response spectrum.It provides a convenient tool to accurately assess the shock properties of airborne equipment,and design shock absorption measures.