利用脉冲激振进行线性系统的模态实测或参数识别,其可靠性与精度在很大程度上依赖于脉冲形式的选择和信号处理过程。为减少噪声干扰,提高信噪比,功率谱分析法是有效的。分析多种形式的脉冲后知,采用Haming形式或类似Haming形式的脉冲,既可有效地抑制旁瓣泄漏,又有较宽的频率响应。信号处理,多数是通过不同的窗口选择而实现的,采用半角形的Haming函数输入窗 The use of pulse excitation for linear system modal measurement or parameter identification, the reliability and accuracy depends largely on the choice of pulse form and signal processing. To reduce noise interference and improve signal-to-noise ratio, power spectrum analysis is effective. After analyzing many kinds of pulses, we know that using Haming form or pulse like Haming can effectively suppress side lobe leakage and have wider frequency response. Signal processing, the majority is achieved through the choice of different windows, the use of half-width Haming function input window