摘要
本文用时间序列分析的方法,在不测量输入信号的前提下,利用ARMA模型拟合测量响应信号,对运行中的水轮转子在转轴接近为刚性的情况下,求得水轮机系统的轴系特征值与特征向量,进而求出其支承刚度.并用一仿真模型作了检验,结果证明本方法具有较好的在线识别应用价值.
The use of time series to identify the modal parameters of the system is proposed for estimation of supporting stiffness of a hydro-turbine. The eigenvalues and the eigenvectors of the system are solved by ARMA model fittied with the measured response and then the supporting stiffness of the system is identified accordingly. The feasibility of the approach is verified by simulation example. It is valuable to be used in the case of on line identification.
出处
《振动与冲击》
EI
CSCD
1997年第1期52-56,共5页
Journal of Vibration and Shock
