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Aerodynamic Parameter Estimation from Flight Data Applying Extended and Unscented Kalman Filter.

Chowdhary, Girish and Jategaonkar, Ravindra (2006) Aerodynamic Parameter Estimation from Flight Data Applying Extended and Unscented Kalman Filter. In: AIAA Atmospheric Flight Mechanics conference, Keystone, CO, USA, August 2006, AIAA-2006-6146. AIAA, Reston, VA, USA. AIAA Atmospheric Flight Mechanics conference, August 2006, 2006-08-21 - 2006-08-24, Keystone, CO, USA.

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Abstract

Aerodynamic parameter estimation is an integral part of aerospace system design and life cycle process. Recent advances in computational power have allowed the use of online parameter estimation techniques in varied applications such as reconfigurable or adaptive control, system health monitoring, and fault tolerant control. The combined problem of state and parameter identification leads to a nonlinear filtering problem; furthermore, many aerospace systems are characterized by nonlinear models as well as noisy and biased sensor measurements. Extended Kalman Filter (EKF) is a commonly used algorithm for recursive parameter identification due to its excellent filtering properties and is based on a first order approximation of the system dynamics. Recently, the Unscented Kalman Filter (UKF) has been proposed as a theoretically better alternative to the EKF in the field of nonlinear filtering and has received great attention in navigation, parameter estimation, and dual estimation problems. However, the use of UKF as a recursive parameter estimation tool for aerodynamic modeling is relatively unexplored. In this paper we compare the performance of three recursive parameter estimation algorithms for aerodynamic parameter estimation of two aircraft from real flight data. We consider the EKF, the simplified version of the UKF and the augmented version of the UKF. The aircraft under consideration are a fixed wing aircraft (HFB-320) and a rotary wing UAV (ARTIS). The results indicate that although the UKF shows a slight improvement in some cases, the performance of the three algorithms remains comparable.

Document Type:Conference or Workshop Item (Paper)
Additional Information:Paper Nr. AIAA-2006-6146
Title:Aerodynamic Parameter Estimation from Flight Data Applying Extended and Unscented Kalman Filter.
Authors:
AuthorsInstitution or Email of Authors
Chowdhary, GirishUNSPECIFIED
Jategaonkar, RavindraUNSPECIFIED
Date:August 2006
Journal or Publication Title:AIAA Atmospheric Flight Mechanics conference, Keystone, CO, USA, August 2006
Page Range:AIAA-2006-6146
Publisher:AIAA, Reston, VA, USA
Status:Published
Keywords:System identification, aerodynamic modeling, parameter estimation, EKF, UKF
Event Title:AIAA Atmospheric Flight Mechanics conference, August 2006
Event Location: Keystone, CO, USA
Event Type:international Conference
Event Dates:2006-08-21 - 2006-08-24
Organizer:AIAA
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Aeronautics
HGF - Program Themes:Aircraft Research
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Systems & Cabin
Location: Braunschweig
Institutes and Institutions:Institute of Flight Systems > System Automation
Deposited By: Dr.phil. Ravindra Jategaonkar
Deposited On:23 Nov 2006
Last Modified:27 Apr 2009 13:10

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