Article Open Access

1 Adaptive Control of Quadrotor UAVs in Case of Inversion of the Torque Direction

Drones and Autonomous Vehicles. 2023, 1(1), 10004;
Toufik Souanef 1, *    James Whidborne 1,    Ahsene Boubakir 2,   
School of Aerospace Transport and Manufacturing, Cranfield University, College Road, Cranfield MK43 0AL, UK
Faculty of Science and Technology, University of Jijel, BP. 98, Ouled Aissa, Jijel 18000, Algeria
Authors to whom correspondence should be addressed.

Received: 12 Jan 2023    Accepted: 19 Jun 2023    Published: 10 Oct 2023   


This paper presents a method for fault tolerant control of quadrotor UAVs in case of inversion of the torque direction, a situation that might occur due to structural, hardware or software issues. The proposed design is based on multiple-model ℒ1 adaptive control. The controller is composed of a nominal reference model and a set of degraded reference models. The nominal model is that with desired dynamics that are optimal regarding some specific criteria. In a degraded model, the performance criteria are reduced. It is designed to ensure system robustness in the presence of critical failures. The controller is tested in simulations and it is shown that the multiple model ℒ1 adaptive controller stabilizes the system in case of inversion of the control input, while the ℒ1 adaptive controller with a single nominal model fails.
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© 2023 by the authors; licensee SCIEPublish, SCISCAN co. Ltd. This article is an open access article distributed under the CC BY license (