振动系统结构参数估计的Taylor变换法

引入了求解非线性微分方程的 Taylor变换法 ,将振动系统原分析模型变换为离散域内的代数方程组 ,建立了估计系统质量、阻尼和刚度矩阵的方程。该方法可以利用任意外载激励下的瞬态响应估计系统的结构参数 ,而不需要进行系统的模态试验 ,具有一定的工程应用价值。文中还研究了测试信号受噪声干扰时的参数估计方法 ,最后给出了 30 0 T转炉倾动机构的参数估计实例。

Application of the Taylor Transform Method to Parameter Estimation of Vibration System

By the use of Taylor transform method, the original analysis model of vibration system is transformed to a set of algebraic equations in discrete domain. Furthermore, the matrix equation for the estimation of mass, stiffness and damping matrices is established. Instead of carrying out modal test in previous work, this method is applied for systems under arbitrary excitation, so it is valuable in engineering application. The parameter estimation method is also studied when the measurement noise existed. At last, this method is applied to the parameter estimation for a 300t converter vessel tilting mechanism.