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本文根据时域最小二乘原理，应用Ｎｅｗｔｏｎ－Ｒａｐｈｓｏｎ法识别了系统的模态参数，所得结果与ＣＲＡＳ系统分析结果相比，误差极小，表明该方法具有较高的可靠性
In this paper, based on the principle of time-domain least squares, Newton-Raphson method is used to identify the modal parameters of the system. Compared with the results of CRAS, the error is very small, which shows that the method has high reliability