Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Space Vehicles (12)
- Navigation, Guidance, Control and Dynamics (7)
- Physical Sciences and Mathematics (6)
- Applied Mathematics (2)
- Artificial Intelligence and Robotics (2)
-
- Computer Engineering (2)
- Computer Sciences (2)
- Operations Research, Systems Engineering and Industrial Engineering (2)
- Systems Engineering and Multidisciplinary Design Optimization (2)
- Astrophysics and Astronomy (1)
- Controls and Control Theory (1)
- Data Science (1)
- Digital Communications and Networking (1)
- Dynamic Systems (1)
- Electrical and Computer Engineering (1)
- Hardware Systems (1)
- Life Sciences (1)
- Other Aerospace Engineering (1)
- Other Operations Research, Systems Engineering and Industrial Engineering (1)
- Physics (1)
- Physiology (1)
- Plasma and Beam Physics (1)
- Systems Engineering (1)
- The Sun and the Solar System (1)
- Keyword
-
- #csra (19)
- Artificial satellites--Orbits (11)
- Artificial satellites--Orbits--Mathematical models (8)
- Orbit determination (6)
- Artificial satellites (5)
-
- Orbital mechanics (5)
- Artificial satellites--Tracking (4)
- Optimal control (4)
- Artificial satellites--Attitude control systems (3)
- Astrodynamics (3)
- Celestial mechanics (3)
- Cislunar (3)
- Equations of motion (3)
- Orbital transfer (Space flight) (3)
- Orbits (3)
- Perturbation (Mathematics) (3)
- Space situational awareness (3)
- #afrl-rv (2)
- Artificial satellites--Control systems (2)
- Artificial satellites--Orbits--Computer simulation (2)
- Artificial satellites--Stability (2)
- Circular Restricted Three-Body Problem (CR3BP) (2)
- CubeSat (2)
- Earth orbits (2)
- Global Positioning System (2)
- Least squares (2)
- Navigation (Astronautics) (2)
- Relative satellite motion (2)
- Rendezvous and proximity operations (2)
- Space surveillance (2)
Articles 91 - 94 of 94
Full-Text Articles in Astrodynamics
Nonlinear Analysis Of A Spinning Symmetric Satellite In An Elliptical Orbit, Michael Ulisse
Nonlinear Analysis Of A Spinning Symmetric Satellite In An Elliptical Orbit, Michael Ulisse
Theses and Dissertations
Controlled and uncontrolled equations of motion for a spinning symmetric satellite in an elliptical orbit are analysed using Floquet theory, Poincare maps, and continuation. The equations of motion for the uncontrolled system are derived via energy methods. A simple feedback controller design and one based on Floquet theory are presented. Parameters varied in the equations of motion include the spin about the symmetry axis of the satellite, the inertia ratio of the satellite, the eccentricity of the orbit, and the controller gains. Floquet analyses determine local stability and bifurcation points. Poincare maps exhibit some interesting and complex structure in the …
Realistic Orbits About The Martian Moons, Samuel R. Bryant
Realistic Orbits About The Martian Moons, Samuel R. Bryant
Theses and Dissertations
Orbits about the Martian moons, Phobos and Deimos, previously found to be stable by the Poincare surface of section technique in a restricted three- body system, were investigated with non-zero eccentricity of the moons added to the dynamics of the planar four-body system (Mars, moon sun, artificial satellite). Although not strictly applicable to this case, the surface of section technique was used to verify whether or not the previously found stable orbits were realistic when a real world perturbation was added to the system dynamics. The surface of section technique involves the numerical integration of several orbits with the same …
Analysis Of Parking Orbits For A Sts External Tank In Low Earth Orbit, James E. Cross
Analysis Of Parking Orbits For A Sts External Tank In Low Earth Orbit, James E. Cross
Theses and Dissertations
A study was conducted of a single external tank in low earth orbit. Criteria for a parking orbit are then defined. Various orbits are then selected by varying the semi-major axis, eccentricity, and inclination. The resulting equations of motion for each of the above orbits (including atmospheric drag and a 2x0 gravity model) are numerically integrated over a time span of 90 earth days. An examination was made of the lowest initial altitudes which allowed the external tank to remain in the orbit window.
Numerical Analysis Of Critical Inclinations About The Planet Mars, Kenneth J. Hyatt
Numerical Analysis Of Critical Inclinations About The Planet Mars, Kenneth J. Hyatt
Theses and Dissertations
This study investigated critical inclinations about the planet Mars. Averaged equations of motion were numerically integrated over a time span of ten Earth years for various inclinations, eccentricities, and perigee heights. Each orbit (i.e. set of initial conditions) produced a standard deviation of the variations in eccentricity (SDE) and inclination (SDI). These were calculated using a polynomial approximation to the variations. Surface plots of SDI and SDE vs the initial conditions are then examined to ascertain the critical inclinations.