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A Single-Loop MIMO Trajectory Tracking Controller for Autonomous Quadrotors: The Control Point Concept

Published online by Cambridge University Press:  25 June 2020

Han Woong Bae*
Affiliation:
University of Alabama in Huntsville, Huntsville, AL, USA E-mail: ff0002@uah.edu
Farbod Fahimi
Affiliation:
University of Alabama in Huntsville, Huntsville, AL, USA E-mail: ff0002@uah.edu
*
*Corresponding author. E-mail: hb0018@uah.edu
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In this paper, a sliding mode control using a control point concept is proposed for an under-actuated quadrotor. The proposed controller controls the position of the control point, a displaced point from the quadrotor’s geometric center, and the yaw angle. This method solves singularity issues in control matrix inversion and enables the utilization of the multi-input multi-output equation to derive the control inputs. The sliding surface is designed to control four outputs while stabilizing roll and pitch angles. Simulation and experimental results show the effectiveness and robustness of the proposed controller in the tracking of a trajectory under parametric uncertainties.

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Type
Articles
Copyright
Copyright © The Author(s), 2020. Published by Cambridge University Press