一种改进的非定常气动力拟合方法

AN IMPROVED APPROACH TO UNSTEADY AERODYNAMIC FORCE FITTING

颤振主动抑制系统(AFSS)开环模型建模的关键之一是非定常气动力的模化。本文讨论了现有几种拟合方法的优缺点;提出了一种改进的非定常气动力拟合方法。实际算例结果表明:用本文方法得到的模型,能描述气弹系统的主要特征。

In this paper, the features of the methods o! Roger. Vepa Edwards and Karpel are discussed. A proper shortcoming of the three methods is that they are not suitable for engineering practice. Based on the synthesis of the methods of Vepa Edwards and Karpel, an improved approach in which the shortcomings of the aforementioned methods are overcome is proposed by authors of this paper. A numerical example is given. Numerical results show that the aeroelastic system model obtained from the authors' approach can reflect the major characteristics of the system, and therefore the authors' approach is effective and feasible.