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 12 of 12 for “"Precision Pointing"”.
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Precision Pointing for the CubeSat Laser Infrared CrosslinK (CLICK) Mission
… system (MEMS) fine steering mirror for precision pointing. The first phase of the CLICK mission, CLICK-A, launched in September 2022 to demonstrate optical downlink. The second phase, CLICK-B/C, aims to demonstrate optical crosslink between two spacecraft: CLICK-B and CLICK-C. Optical …
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High-precision pointing and attitude estimation and control algorithms for hardware-constrained spacecraft
… of this thesis is to develop algorithms for high-precision pointing and attitude estimation and control on hardware-constrained spacecraft. This includes small spacecraft, where tight mass, volume, power, and cost constraints exist, as well as spacecraft where certain hardware has failed. As a …
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Control design and performance evaluation of a hybrid flexure bearing for precision pointing applications
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-04-12 without embargo terms
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Staged attitude-metrology pointing control and parametric integrated modeling for space-based optical systems
… space imaging systems. The first technology is precision pointing control technology, which can provide fine optical control operating in conjunction with coarse formation flying attitude control in order to meet the stringent optical requirements. This will potentially enable a long baseline …
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Nonlinear spline operator interpolation and sliding control of deformable maneuvering bodies
… of achieving high performances of tracking, and precision pointing of a flexible structure subject to large angular maneuvers (such as the slewing maneuver of a large space structure), a newly developed off-line modeling procedure combined with a robust control technique is investigated and then …
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Development of a pointing, acquisition, and tracking system for a nanosatellite laser communications module
… the primary challenge of lasercom is the high-precision pointing required to align the transmitter and receiver. While lasercom has been successfully demonstrated on multiple spacecraft platforms, it has not yet been demonstrated on a scale small enough to meet the size, weight, and power …
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Thrust measurement of the busek bht 20 microhall effect thruster
… such as orbital maneuvers, momentum dumping, and precision pointing for microsatellites. The BHT 20 is a low power micro-hall effect thruster capable of generating thrust at the µN thrust level. The research presents high thrust level measurements between 1242 to 3193 µN for thruster conditions …
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Attitude control of a spacecraft using two SGCMGs
… to provide three-axis altitude stabilization, precision pointing control and maneuvering capability. Two types of CMGs are used in spacecraft attitude control purpose. Classified by the number of gimbals, they are Double Jimbal Control Moment Gyroscope (DGCMG) and Single Gimbal Control Moment …
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Study of optical propulsion concepts and techniques for small-satellites
… small spacecraft propulsion system for precision pointing and proximity control. Plasmonic force propulsion harnesses solar light focused onto plasmon reactive sub-wavelength nanostructures to generate polarized oscillations of electrons on the surface of metallic nanostructures which …
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Optimal rejection of nonstationary narrowband disturbances for flexible systems
… and optimal allocation of resources, such as pointing accuracy and onboard fuel utilization, are of primary concern in the design and operation of precision pointing spacecraft. Ironically, internal spacecraft instruments and reaction control actuators often act as sources of narrowband …
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Advances in combined architecture, plant, and control design
… of strain-actuated solar arrays for spacecraft precision pointing and jitter reduction. Nested co-design is utilized along with a linear-quadratic inner loop problem to obtain solutions efficiently. A simpler, scaled problem is analyzed to gain general insights into these results. This is …
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Development of Optical Communication Terminals for Increasing Connectivity on Small Satellites
… (MEMS) fine steering mirror (FSM), used for precision pointing of the space terminal. This mirror, used within a novel optical design, enabled the terminal to correct for an average blind spacecraft pointing error of 8.494 mrad and maintain a total RMS pointing error of 0.164 mrad, equal …