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Full-Text Articles in Navigation, Guidance, Control and Dynamics
Attitude Estimation For A Gravity Gradient Momentum Biased Nanosatellite, Arash Mehrparvar
Attitude Estimation For A Gravity Gradient Momentum Biased Nanosatellite, Arash Mehrparvar
Master's Theses
Attitude determination and estimation algorithms are developed and implemented in simulation for the Exocube satellite currently under development by PolySat at Cal Poly. A mission requirement of ±5˚ of attitude knowledge has been flowed down from the NASA Goddard developed payload, and this requirement is to be met with a basic sensor suite and the appropriate algorithms. The algorithms selected in this work are TRIAD and an Extended Kalman Filter, both of which are placed in a simulation structure along with models for orbit propagation, spacecraft kinematics and dynamics, and sensor and reference vector models. Errors inherent from sensors, orbit …
Feasibility Of Microsatellite Active Debris Removal Systems, Karsten J. James
Feasibility Of Microsatellite Active Debris Removal Systems, Karsten J. James
Master's Theses
Space debris has become an increasingly hazardous obstacle to continued spaceflight operations. In an effort to mitigate this problem an investigation of the feasibility of a microsatellite active debris removal system was conducted. Through proposing a novel concept of operation, utilizing a grapple-and-tug system architecture, and by analyzing each resultant mission phase in the frame of a representative example, it was found that microsatellite scale systems are capable of fulfilling the active debris removal mission. Analysis of rendezvous, docking, control and deorbit mission requirements determined that the design of a grapple-and-tug system will be driven by sizing of the propellant …