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Path following of Nano quad-rotors using a novel disturbance observer-enhanced dynamic inversion approach

Published online by Cambridge University Press:  17 June 2019

Yuan Wang  and
Xiangming Zheng
Yuan Wang
Affiliation:
Nanjing University of Aeronautics and Astronautics Key Laboratory of Fundamental Science for National Defence-Advanced Design Technology of Flight Vehicle, Nanjing, China
Xiangming Zheng*
Affiliation:
Nanjing University of Aeronautics and Astronautics Key Laboratory of Fundamental Science for National Defence-Advanced Design Technology of Flight Vehicle, Nanjing, China
*
[email protected]
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Abstract

The model of Nano quad-rotors contains many uncertainties such as an external disturbance from a wind field, highly non-linear strong coupling between variables and body measurement errors. To deal with these uncertainties and control the Nano quad-rotors, a novel data-based disturbance observer (DO) is firstly proposed to observe disturbances from a wind field and perturbations from errors of parameter estimation. Then the DO is used to improve the conventional dynamic inversion (DI) method to obtain an enhanced dynamic inversion (EDI) method, which relies only on roughly estimated geometrical parameters, thus eliminating the largest flaw of conventional DI, namely depending on detailed plant information. Simulation results show that the method proposed achieved good trajectory tracking with only roughly estimated geometrical values under wind field; the DO proposed can accurately estimate disturbance from a wind field and perturbation from error of parameter estimation.

Keywords

Nano quad-rotorDisturbance observerDynamic inversionPath following
Type
Research Article
Information
The Aeronautical Journal , Volume 123 , Issue 1266 , August 2019 , pp. 1122 - 1134
Copyright
© Royal Aeronautical Society 2019 

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