液体晃动力学参数的辨识

Identification of Mechanical Parameters of Sloshed Liquid

提出一种确定液体晃动力学参数的新方法。建立晃动液体和运动容器的力学模型和它的差分方程，实测液体晃动时充液容器运动的信号，采用广义最小二乘法处理试验数据，估计出液体晃动的力学参数。用此种辨识方法获得的液体晃动的主频率和参预基频晃动液体的等效质量与理论计算和共振试验法得到的结果基本一致。

A new method for determining mechanical parameters of sloshed liquid is presented, A mechanical model and its finite difference equations for such liquid and moving container are constituted. During liquid sloshing the signals of the moving container are measured. Generalized least square estimation is used for processing measured data. Mechanical parameters of sloshed liquid are obtained finally. The parameters determined by this method are fairly consistent with the results of theoretical calculation and other experimental method.