液体晃动等效力学模型的参数识别

本文研究确定贮箱内液体晃动等效力学模型的参数的试验方法。通过对充液贮箱试验系统的简化分析得到系统的传递函数表达式,应用频响函数拟合方法得到了模型参数,在曲线拟合过程中利用权函数解决液体晃动的非线性影响因素。应用本文所述方法研究了某型号卫星推进剂贮箱的液体晃动问题。

Parameters Estimation for Liquid Sloshing Equivalent Mechanical Models

In this paper the experimental techniques for determining the equivalent mechanical model parameters of liquid sloshing in a container are investigated, Through the reduction and analysis for testing system of the container filled with liquid, the expressions of transfer function of the system are derived. The model parameters are obtained using the frequency response functions fit techniques. In the curve fit process the nonlinear effects of liquid sloshing are eliminated using the weight functions, This method is applied to the investigation of the liquid sloshing problem of a satellite propellant tank.