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.
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Showing 1 to 20 of 25 for “"Solar Radiation Pressure"”.
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Highly Physical Solar Radiation Pressure Modeling During Penumbra Transitions
Solar radiation pressure (SRP) is one of the major non-gravitational forces acting on spacecraft. Acceleration by radiation pressure depends on the radiation flux; on spacecraft shape, attitude, and mass; and on the optical properties of the spacecraft surfaces. Precise modeling of SRP is needed …
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Solar radiation pressure, drag and gravitational effects on a dust particle in Earth orbit
… perturbations on particle orbits is the solar radiation pressure (SRP), which is defined as the pressure exerted by the photons constituting the light from the Sun. Colombo et. al studied the orbital dynamics of ``smart-dust'' under the effects of SRP and atmospheric drag. The numerical …
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Computationally Efficient Optimization of Formation Flying Trajectories, with Solar Radiation Pressure, near Lagrange Points
… starshade may be modeled under the influence of solar radiation pressure (SRP), which expands the domain of fuel-free trajectories it can exploit by treating SRP as a means of actuation rather than a perturbation to be corrected. Since the restricted three-body problem has no closed-form …
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Optimal escape trajectory from a high earth orbit by use of solar radiation pressure.
Thesis. 1977. M.S.--Massachusetts Institute of Technology. Dept. of Aeronautics and Astronautics.
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Stability of Beams, Plates and Membranes due to Subsonic Aerodynamic Flows and Solar Radiation Pressure
… membranes due to subsonic aerodynamic flows or solar radiation forces. Beams, plates and membranes are simple structures that may act as building blocks for more complex systems. In this dissertation we explore the stability of these simple structures so that one can predict instabilities in …
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Significance of Specific Force Models in Two Applications: Solar Sails to Sun-Earth L4/L5 and GRAIL Data Analysis Suggesting Lava Tubes and Buried Craters on the Moon
… However, non-gravitational forces, such as solar radiation pressure (SRP), can significantly influence the motion of a spacecraft. Incorporating SRP within the dynamical model can assist in estimating the trajectory of a spacecraft with greater precision, in particular, for a spacecraft with …
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On the dynamics, navigation and control of a spacecraft formation of solar concentrators in the proximity of an asteroid
… of this dissertation is to ascertain whether solar sublimation is a viable method for the deflection of a Near Earth Asteroid. From a research view point, the methods and analysis are applicable to proximal motion around a celestial body, in particular one with a non-Keplerian or irregular …
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An Optimization Method for the Preliminary Design of Interplanetary Aerobraking Missions (Spacecraft, Orbit Mechanics)
… planet oblateness, third-body effects, and solar radiation pressure. Hypersonic aerodynamic heating rate equations for two different shield configurations are discussed and their performances are compared. Illustrative numerical examples for a Venus and a Mars mission are included.
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Solar Sailing Adaptive Control Around the Earth-Moon Lagrange Point L4 for Stellar Observations
… and large coronal magnetic reconnection, a solar sailing approach is proposed to separately capture lunar occultations and observe the solar corona from L<sub>4</sub> of the Earth-Moon system. Single and multiple shooting techniques are described along with a pseudo arc-length continuation …
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The Collisional Evolution of Orbital Debris in Geopotential Wells and Disposal Orbits
… set of perturbations including the geopotential, solar and lunar gravity, and solar radiation pressure forces. This thesis is based on a prior paper and additionally seeks to address an issue in simulating East-West trapped objects. The results show that this propagator successfully simulates the …
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Using a Curvilinear Coordinate System for Satellite Relative Motion
… like perturbations, specifically drag, J2, and solar radiation pressure. Dynamics models have also been developed that use True Anomaly as the independent variable instead of time. A lot of work has been put forth to also include cases where the Chief is in an eccentric orbit. While these models …
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Geosynchronous orbit determination using space surveillance network observations and improved radiative force modeling
… awareness for geostationary (GEO) spacecraft. Solar radiation pressure has traditionally been modeled using a rotationally-invariant sphere with uniform optical properties. This study is intended to improve orbit determination accuracy for 3-axis stabilized GEO spacecraft via an improved …
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The Effect of Dust in Small Bodies: A Sample of Jupiter Family Comets
… the southern pointing is heavily influenced by solar radiation pressure. The azimuthally averaged dust radial profile slope of comet 45P/HMP gradually changes from -1.81+- 0.20 at 5.24 days pre-perihelion to -0.35 +- 0.16 at 74.41 days post perihelion. Contrastingly, the radial profile slope of …
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Coupled orbit-attitude mission design in the circular restricted three-body problem
… mission applications. Additionally, the solar radiation pressure is included and a fully coupled orbit-attitude model is developed. With specific application to solar sails, various guidance algorithms are explored to direct the spacecraft along a desired path, when the mutual interaction …
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Koopman Operator Theory Applied to Lambert’s Problem with a Spectral Behavior Analysis
… from gravitational forces, atmospheric drag, and solar radiation pressure introduce highly nonlinear terms in the equations that model these dynamical systems. The predictions of these effects are essential for planning future space missions. Intrinsically tied to this is Lambert’s problem, which …
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Kalman Filter Implementation to Determine Orbit and Attitude of a Satellite in a Molniya Orbit
… atmospheric drag, lunar gravitational forces and solar radiation pressure. Two cases were studied, the first being the implementation of site track measurements when the satellite was over the ground station. It is shown that large errors, upwards of ninety meters, grow as time from last …
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Constrained Motion Analysis of Spacecraft Trajectory in Restricted Three Body Problem
… and Earth all the time, they are affected by the solar radiation pressure (SRP) continuously. Due to the instability of collinear libration points, the certain amount of thrust is required to maintain the desired trajectory. This thesis introduces the Udwadia-Kalaba (UK) formulation of constrained …
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Development of Hardware and Efficient, Robust Control Algorithms for a Nanosatellite Reaction Control System
… gravity gradient torques, aerodynamic forces, solar radiation pressure, and propellant sloshing. Iterative hardware development is performed of a thruster module suitable for use on nanosatellites, including detailed evaluations of different component and propellant choices, resulting in two …
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Orbital Maneuvers and Interplanetary Trajectory Design via Reinforcement Learning
… realistic environmental disturbances such as solar radiation pressure, navigation errors, and control noise. The performance of the RL-generated solutions is rigorously assessed through direct comparison with classical optimal control results obtained using pseudospectral methods, as well as …
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Attitude Determination & Control System Design and Implementation for a 6U CubeSat Proximity Operations Mission
… attitude is affected by aerodynamic drag, solar radiation pressure, gravity gradient torques, and residual magnetic moments. A mechanical propellant slosh model and a reaction torque analysis of the deployable solar panel hinges approximate the internal dynamics of the satellite. A trade …
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