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In this paper, we propose a backstepping based nonlinear guidance controller, designed for 3-D path tracking for a UAV. The guidance law design assumes first order dynamics for the speed, heading and elevation angles. We demonstrate closed loop stability via Lyapunov analysis. The efficacy of the controller is demonstrated for two cases, namely the straight path following and a curved path following.
This paper addresses the problem of robust takeoff and landing control of a quadrotor UAV (Unmanned Aerial Vehicle). During the critical flight phases of takeoff and landing the vehicle dynamics change according to the possible existence of contact with the ground. To model the vehicle during the overall maneuver a hybrid automaton is used where each state corresponds to a different dynamic behavior...
A trajectory tracking control system for a fixed-wing unmanned aerial vehicle (UAV) is designed in this paper. A nonlinear model with total variables of UAV is introduced, and the corresponding longitudinal linear model and lateral linear model are obtained by using small perturbation method. The trajectory control system is composed of guidance part and attitude control part. The guidance law is...
In this paper a nonlinear control has been designed using the dynamic inversion approach for automatic landing of unmanned aerial vehicles (UAVs), along with associated path planning. This is a difficult problem because of light weight of UAVs and strong coupling between longitudinal and lateral modes. The landing maneuver of the UAV is divided into approach, glideslope and flare. In the approach...
In this paper we focus on the problem of modeling and controlling a certain configuration of UAV (Unmanned Aerial Vehicle) considering explicitly the interaction with the environment. This innovative problem is particularly interesting in order to employ unmanned aircrafts in tasks and operations which may require explicitly or implicitly contacts between the UAV itself and the environment such as...
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