详情

原文传递 Unsteady Aerodynamic Force Sensing from Strain Data

题名：	Unsteady Aerodynamic Force Sensing from Strain Data
作者：	Pak, C.
关键词：	Unsteady aerodynamics##Aerodynamic forces##Algorithms##Curve fitting##Deflection##Aerodynamic coefficients##Induced drag##Aeroelasticity##Computational fluid dynamics##Time marching##Matrices (mathematics)##Statistical analysis##Autoregressive moving average##On-line systems##Low pass filters##Least squares method##Influence coefficient##
摘要：	A simple approach for computing unsteady aerodynamic forces from simulated measured strain data is proposed in this study. First, the deflection and slope of the structure are computed from the unsteady strain using the two-step approach. Velocities and accelerations of the structure are computed using the autoregressive moving average model, on-line parameter estimator, low-pass filter, and a least-squares curve fitting method together with analytical derivatives with respect to time. Finally, aerodynamic forces over the wing are computed using modal aerodynamic influence coefficient matrices, a rational function approximation, and a time-marching algorithm.
总页数：	10
报告类型：	科技报告