Aerodynamic Model Reduction Through Balanced Realization
Aerodynamic Model Reduction Through Balanced Realization
复制标题
通过平衡实现减少空气动力学模型
作者：
J. Rule;D. Cox;R. Clark
基于内部平衡的ERODDYNAMIC模型降阶被检查为不可压缩的势流，并被证明允许显着降低模型的复杂性。该技术是验证对经典的二维不可压缩非定常结果，以及气动弹性颤振边界计算。特别是，新的见解是平衡的空气动力学状态和翼型和机翼运动的基本物理之间的关系。主要保留状态的形式表明，少数占主导地位的极限情况翼型运动的物理特性是流动的特征。一个二维的情况下，精确解的比较来说明这一点。空气动力学模型简化的一种常用方法是
ERODYNAMIC model reduction based on internal balancing is examined for incompressible potential flow and is shown to allow signification reduction in model complexity. The technique wa sv alidated against classical two-dimensional incompressible unsteady results, as well as an aeroelastic flutter boundary calculation. In particular, new insight is given into the relationship between balanced aerodynamic states and the fundamental physics of airfoil and wing motion. The form of the principal retained states suggests that the physics of a few dominant limiting-case airfoil motions characterize the flow. Comparison with exact solutions for a twodimensional case are shown to illustrate this point. A popular technique for aerodynamic model reduction is to per