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本文利用自动控制理论,推导了一般情况下的粘性阻尼系统自由振动差分方程,进而引入MLE方法识别振动模态参数。计算机模拟实验证明该方法能较好地解决噪声干扰问题,精度较好。并适合微机上使用。
In this paper, using the automatic control theory, the free vibration difference equation of the viscous damping system is deduced, and then the MLE method is used to identify the vibration modal parameters. Computer simulation experiments show that this method can solve the problem of noise interference better and the accuracy is better. And suitable for use on the computer.