Airship aerodynamic model estimation using unscented Kalman filter  

作　　者：WASIM Muhammad ALI Ahsan 

机构地区：[1]Department of Electrical Engineering,University of Engineering and Technology,Taxila 47080,Pakistan

出　　处：《Journal of Systems Engineering and Electronics》2020年第6期1318-1329,共12页系统工程与电子技术（英文版）

摘　　要：An airship model is made-up of aerostatic,aerodynamic,dynamic,and propulsive forces and torques.Besides others,the computation of aerodynamic forces and torques is difficult.Usually,wind tunnel experimentation and potential flow theory are used for their calculations.However,the limitations of these methods pose difficulties in their accurate calculation.In this work,an online estimation scheme based on unscented Kalman filter(UKF)is proposed for their calculation.The proposed method introduces six auxiliary states for the complete aerodynamic model.UKF uses an extended model and provides an estimate of a complete state vector along with auxiliary states.The proposed method uses the minimum auxiliary state variables for the approximation of the complete aerodynamic model that makes it computationally less intensive.UKF estimation performance is evaluated by developing a nonlinear simulation environment for University of Engineering and Technology,Taxila(UETT)airship.Estimator performance is validated by performing the error analysis based on estimation error and 2-σ uncertainty bound.For the same problem,the extended Kalman filter(EKF)is also implemented and its results are compared with UKF.The simulation results show that UKF successfully estimates the forces and torques due to the aerodynamic model with small estimation error and the comparative analysis with EKF shows that UKF improves the estimation results and also it is more suitable for the under-consideration problem.

关 键 词：AIRSHIP unscented Kalman filter(UKF) extend Kalman filter(EKF) state estimation aerodynamic model estimation 

分 类 号：V211.54[航空宇航科学与技术—航空宇航推进理论与工程] TN713[电子电信—电路与系统]