摘要
分析了线性系统全响应的组成,利用Prony多项式,提出了用于振动模态参数识别的自相关复指数法。数值仿真结果证明该方法有效。数值仿真还对初始激励、采样精度、采样频率等影响方法效果的参数的选择进行了讨论。
The composition of total output of a linear vibration system is analyzed. A complex exponential method based on ACF (autocorrelation function) of the total output is developed to identify the modal parameters by using Prony polynomial. The validity is confirmed by numerical simulation results. The principles for selection of several parameters, such as the initial excitation, the measurement precision, the sampling frequency, etc are studied to meliorate the efficiency of the method in numerical simulations.
出处
《振动与冲击》
EI
CSCD
北大核心
2005年第5期63-66,共4页
Journal of Vibration and Shock
关键词
Prony多项式
自相关函数
参数识别
Analysis
Composition
Computer simulation
Identification (control systems)
Linear systems
Mathematical models
Measurements
