Trajectory Control During an Aeroassisted Maneuver Between Coplanar Circular Orbits
Santos, Willer Gomes dos, Rocco, Evandro Marconi, Carrara, Valdemir
J. Aerosp. Technol. Manag.
DATA DE PUBLICAÇÃO
ABSTRACT: This paper presents the simulation results of an aeroassisted maneuver around the Earth, between coplanar circular orbits, from a geostationary orbit to a low orbit. The simulator developed considers a reference trajectory and a trajectory perturbed by external disturbances combined with non-idealities of sensors and actuators. It is able to operate in closed loop, controlling the trajectory (drag-free control) at each instant of time using a Proportional-Integral-Derivative (PID) controller and propulsive jets. We adopted a spacecraft with a cubic body composed of two rectangular plates arranged perpendicular to the velocity vector of the vehicle. Propulsive jets are applied at the apogee of the transfer orbit in order to keep the perigee altitude and control the rate of heat transfer suffered by the vehicle during atmospheric passage. A PID controller is used to correct the deviation in the state vector and in the keplerian elements. The U.S. Standard Atmosphere is adopted as the atmospheric model. The results have shown that the aeroassisted transfer presents a smaller fuel consumption when compared to a Hohmann transfer or a bi-elliptic transfer.
- Numerical computation of optimal low-thrust limited-power trajectories - Transfers between coplanar circular orbits
- Thermal Protection System and Trajectory Optimization for Orbital Plane Change Aeroassisted Maneuver
- Analytical Solution for Optimal Low-Thrust Limited-Power Transfers Between Non-Coplanar Coaxial Orbits
- Place recognition monitored by location-driven operant responding during passive transport of the rat over a circular trajectory
- Análise do acoplamento entre o controle de atitude e de trajetória durante manobras orbitais de empuxo contínuo