辨识液体晃动力学参数的频域法

研制成一种平动式晃动试验装置,并导出其当量力学模型。已经证明,若用盛液贮箱的驱动力和位移分别作为系统的输入量和输出量,该装置则为完全能控、完全能观和能辨识系统。采集足够的频响函数数据,并用误差校正法和广义最小二乘法估计传递函数的全部系数。又用DFP变尺度法由传递函数系数导出了晃动液体当量力学模型的第一和第二阶模态的力学参数。

FREQUENCY DOMAIN METHOD OF IDENTIFYING MECHANICAL PARAMETERS OF SLOSHING LIQUID

A translational sloshing test apparatus was manufactured and its equvalent mechanical model was deduced. It was demonstrated that the system will be controllable, observable and identificable if displacement of liquid tank and its driving force were selected as output and input respectively. Enough data of frequency response function of the system was picked out. All coefficients of transfer function of the system were estimated by error-correction algorithm and generlized least square algorithm. The mass, damping and stiffness of factories of first and second sloshing mode was deduced by optimization method (DFP).