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Sensors 2018, 18(1), 206; https://doi.org/10.3390/s18010206

Calculation and Identification of the Aerodynamic Parameters for Small-Scaled Fixed-Wing UAVs

1
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
2
School of Computer Technologies and Control, ITMO University, St. Petersburg 197101, Russia
*
Authors to whom correspondence should be addressed.
Received: 9 October 2017 / Revised: 14 December 2017 / Accepted: 11 January 2018 / Published: 13 January 2018
(This article belongs to the Special Issue UAV or Drones for Remote Sensing Applications)
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Abstract

The establishment of the Aircraft Dynamic Model (ADM) constitutes the prerequisite for the design of the navigation and control system, but the aerodynamic parameters in the model could not be readily obtained especially for small-scaled fixed-wing UAVs. In this paper, the procedure of computing the aerodynamic parameters is developed. All the longitudinal and lateral aerodynamic derivatives are firstly calculated through semi-empirical method based on the aerodynamics, rather than the wind tunnel tests or fluid dynamics software analysis. Secondly, the residuals of each derivative are proposed to be identified or estimated further via Extended Kalman Filter(EKF), with the observations of the attitude and velocity from the airborne integrated navigation system. Meanwhile, the observability of the targeted parameters is analyzed and strengthened through multiple maneuvers. Based on a small-scaled fixed-wing aircraft driven by propeller, the airborne sensors are chosen and the model of the actuators are constructed. Then, real flight tests are implemented to verify the calculation and identification process. Test results tell the rationality of the semi-empirical method and show the improvement of accuracy of ADM after the compensation of the parameters. View Full-Text
Keywords: aerodynamic parameters; semi-empirical aerodynamic coefficient modeling; parameters identification; EKF; real flight tests aerodynamic parameters; semi-empirical aerodynamic coefficient modeling; parameters identification; EKF; real flight tests
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Shen, J.; Su, Y.; Liang, Q.; Zhu, X. Calculation and Identification of the Aerodynamic Parameters for Small-Scaled Fixed-Wing UAVs. Sensors 2018, 18, 206.

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