Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 5 of 5 for “"relative orbits"”.
-
Dynamics and Control of Satellite Relative Motion: Designs and Applications
… problems in the perspective of large-scale relative motion without perturbations. Specifically, we develop an exact and efficient analytic solution of satellite relative motion using a direct geometrical approach in spherical coordinates. The resulting solution is then transformed into …
-
Health Management and Adaptive Control of Distributed Spacecraft Systems
… where the spacecraft observers follow stable relative orbits with respect to the target asset, allowing dynamics to be expressed using the Clohessy-Wiltshire-Hill equations. Additionally, based on desired points of inspection, the observers have specific attitude requirements that are achieved …
-
Optimization of relative orbit transfers via particle swarm and primer vector theory
… for impulsive transfers between periodic orbits in the relative motion problem. Relative orbit elements are used in order to create the solution vectors for the particle swarm, and the Clohessy-Wiltshire-Hill equations are used to define the motion of the satellites. These trajectories are …
-
Nonlinear control strategies for quadrotors and CubeSats
This thesis is presented in two parts. In the first part, a fully nonlinear controller is developed for controlling the position and attitude of the Crazyflie quadrotor. In order to use this controller, a system identification is first performed in order to completely model the dynamics of the …
-
Guidance and control of swarms of spacecraft
… of swarm keeping are to maintain bounded relative distances between spacecraft, prevent collisions between spacecraft, and minimize the propellant used by each spacecraft. Swarm reconfiguration requires the transfer of the swarm to a specific shape. Like with swarm keeping, minimizing the …