We develop a method for estimating the instantaneous lift coefficient on rapidly pitching airfoil that uses small number of pressure sensors and measurement angle attack. The approach assimilates four surface measurements with modified nonlinear state space model (Goman-Khrabrov model) through Kalman filter. error estimates based only weighted-sum measured pressures are found to be noisy biased...

The varying coefficient (VC) model is a generalization of ordinary linear model, which can not only retain strong interpretability but also has the flexibility nonparametric model. In this paper, we investigate VC with hierarchical structure. A unified variable selection method for proposed, simultaneously select nonzero effects and estimate unknown functions. Meanwhile, selected enforces struc...