Anti-Windup-Like Compensator Design for Continuous-Time Systems Affected by Unknown Nonlinearities and Input Saturation

This paper addresses the stabilization of a particular class of continuous-time systems affected by unknown sector bound nonlinearities and input saturation. An observer is designed to provide an estimate of the unknown nonlinearity. Such an estimate is used by an additional compensation loop with the purpose of mitigating the effect of the nonlinearity and enlarge the basin of attraction of the system. Stability conditions are given as a set of matrix inequalities and quadratic Lyapunov func...

Almost Global Trajectory Tracking for Quadrotors Using Thrust Direction Control on S2

Many of the existing works on quadrotor control address the trajectory tracking problem by employing a cascade design in which the translational and rotational dynamics are stabilized by two separate controllers. The stability of the cascade is often proved by employing trajectory-based arguments, most notably, integral input-to-state stability. In this paper, we follow a different route and present a control law ensuring that a composite function constructed from the translational and rotati...

Setpoint Tracking for a Class of Lur'e Discrete-Time Systems

GIS-Based Approach for Estimating Olive Tree Heights Using High-Resolution Satellite Imagery and Shadow Analysis

Measuring tree heights is a critical step for assessing ecological and agricultural parameters, including biomass, carbon stock, and canopy volume. In extensive areas exceeding a few hectares, traditional terrestrial measurement methods are often prohibitively expensive in terms of time and cost. This study introduces a GIS-based methodology for estimating olive tree (Olea europaea L.) heights using very-high-resolution (VHR) satellite imagery. The approach integrates a mathematical model tha...