Control augmentation design of UAVs based on deviation modification of aerodynamic focus

Yingjing Shi; Rui Li; Honglei Xu

doi:10.3934/jimo.2015.11.231

Article Contents

2015, Volume 11, Issue 1: 231-240. Doi: 10.3934/jimo.2015.11.231

This issue Previous Article Generalized exhausters: Existence, construction, optimality conditions Next Article A finite difference method for pricing European and American options under a geometric Lévy process

Control augmentation design of UAVs based on deviation modification of aerodynamic focus

1.
School of Aeronautics and Astronautics, University of Electronic Science and Technology of China, Chengdu
2.
School of Automation Engineering, University of Electronic Science and Technology of China, Chengdu

Received: January 31, 2013

Revised: December 31, 2013

Published: December 2014

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Abstract

Based on the analysis of force and action points of an UAV (unmanned aerial vehicle), we propose a concept called static stability degree deviation (SSDD) factor, which is related to the focus position, and can be used to modify the data for control law design. Furthermore, a SSDD-based method is presented to avoid the flight oscillation caused by the data deviation of aerodynamic focus. By using the attitude angle difference between real fight data and simulation data as an optimization index, the identification of SSDD factor and the data reproduction of the real flight data are achieved. The identification results are then used to modify aerodynamic blowing data. Based on the modified model, the augmentation control is designed by applying the altitude angle rate feedback to improve the equivalent damping ratio and frequency; thus the iteration design of the control law is performed.

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Mathematics Subject Classification: Primary: 93B12, 93C95; Secondary: 49N90.

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