Nonlinear Control of a Quadrotor With Deviated Center of Gravity

Abstract

In this paper, a new adaptive tracking controller is developed for a quadrotor unmanned aerial vehicle (UAV) via immersion and invariance (I&I) approach. The controller is able to compensate parametric uncertainties such as the unmeasurable effects of the deviated center-of-gravity (CoG), as well as the aerodynamic coefficients. The globally asymptotic tracking of the desired attitude trajectories is proven via the Lyapunov-based stability analysis and LaSalle's invariance theorem. Real-time experiment results performed on a quadrotor attitude control testbed are given to show the good control performance of the proposed scheme.