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 31 for “"ground testing"”.
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Developing individualized ground testing protocols for use of sleep medications in spaceflight
… Zolpidem has been used on spaceflight after ground testing. The medication has been tested and studies have shown few side effects after a complete night of sleep. Few studies have been done on abrupt awakening after taking this medication. This study was done to test the effects of this …
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Development and Ground Testing of Direct Measuring Skin Friction Gages for High Enthalpy Supersonic Flight Tests
… engines, with a progression from free-jet ground tests to a design for an actual hypersonic scramjet-integrated flight vehicle. The designs were non-nulling, with a sensing head that was flush with the model wall and surrounded by a small gap. Thus, the shear force due to the flow along the …
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On-Orbit Characterization of a Microelectromechanical Systems (MEMS) Deformable Mirror (DM): Mission Results from the Deformable Mirror Demonstration Mission (DeMi) CubeSat
… and measurement uncertainty are similar to ground testing performance. Together, ground testing and on-orbit data indicate a correlation between actuator deflection amount and temperature, with actuators deflecting 22% less at when the payload temperature is at 6 degrees C than at 28-29 …
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Instrumentation and Control of a Novel Device to Simulate a Hypersonic Environment
… energy and economic expense associated with ground- testing evaluation of material responses within this extreme environment. In order to provide a low-cost, rapid option for preliminary material analysis within hypersonic applications, a novel device is under production to replicate this …
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Evaluation of the bubble spectrometer performance in space-like neutron fields
… outlines a part of the results of international ground testing experimental sessions of the space instrumentation supported by the Canadian Space Agency.
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Flight hardware development for a space-based robotic assembly and servicing testbed
… testbed is necessary. It presents initial ground testing results for applicable control concepts, which also indicate that the dynamic authenticity associated with a six-degree-of-freedom on-orbit testbed is crucial for further development. This thesis then presents the requirements for …
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Investigating spatial variation in the surface and atmosphere of Pluto through stellar occultations and PSF photometry
… of Pluto. The first project concerns the ground testing of the High-speed Imaging Photometer for Occultations (HIPO), a camera aboard the Stratospheric Observatory For Infrared Astronomy (SOFIA). Differential photometry was found to be reliable to one part in 104. The second project is a …
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Probabilistic and learning approaches through concurrent parameter estimation and adaptive control for in-space robotic assembly
… Reorient Experimental Satellites (SPHERES) ground testing facilities. On-orbit test session data is analyzed, and further improvements upon the initial learning approach are verified through simulations.
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Laser absorption spectroscopy for investigation of hypersonic propulsion
… interest in hypersonic propulsion. Progress in ground-testing capabilities has accelerated this technological advancement, providing repeatable and controllable experimentation at lower costs than flight tests. A primary challenge of carrying out experiments in these ground test facilities is …
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Dynamic tailoring and tuning for space-based precision optical structures
… and controls, uncertainty management and testing. The telescope optics must meet stringent positional tolerances in the presence of environmental and on-board disturbances, resulting in heavy demands on structural dynamics and control. In addition, fully integrated system tests are …
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Design and flow characterization of an indraft supersonic wind tunnel for scramjet testing
… goal of this research is to develop a ground testing platform for studying airbreathing hypersonic propulsion systems. Problems of interest include design of isolators, fuel injection systems, ignition and flame stabilization, shock-boundary layer interaction, and aero-thermo-elastic …
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Evaluation of GLO: a Solar Occultation Instrument for Measuring Atmospheric Trace Species on CubeSat Missions
… of optical depths. AERONET, a network of ground-based sun photometers measuring atmospheric aerosols, was used for aerosol optical depth validation. Spectral Calculator transmission data allowed for GFCR vacuum channel comparison, gas cell spectral analysis, and gas cell to vacuum channel …
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Stereoscopic Particle Image Velocimetry Measurements of Swirl Distortion on a Full-Scale Turbofan Engine Inlet
… fan performance and operability in a full-scale, ground testing environment. Efforts are described to address this need by developing and characterizing methods for complex, prescribed distortion patterns. A relevant inlet swirl distortion profile that mimics boundary layer ingesting inlets was …
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Delta-development of a critical space mechanism based on on-ground and in-flight testing experience
… detection occurred in September 2015, when two ground-based detectors (LIGO) observed the merger of two black holes. Since then, several other detections have been made, by LIGO and VIRGO, increasing the knowledge of the astrophysical processes generating gravitational waves. Although advances …
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Free-fall of LISA Test Masses: a new torsion pendulum to test translational acceleration
… level of performance needed, thorough testing is required. While a dedicated space mission, the LISA Technology Package [2, 3] technological demonstration experiment, is scheduled to be launched in 2010, extensive ground testing is mandatory to exclude the most threatening sources of …
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An Investigation to Advance the Technology Readiness Level of the Centaur Derived On-orbit Propellant Storage and Transfer System
… of experimental tests, including: laboratory/ground testing, microgravity flight testing, suborbital flight testing, and orbital testing. Researchers from <a …
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Online Estimation of Unknown Parameters for Flexible Spacecraft
… flexible mode dynamics is hard to obtain in on-ground testing because not all modes of frequencies can be observed, complicating the controller design. Furthermore, plastic deformations due to long periods of storage of stowed flexible components could result in exciting frequencies outside of …
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A Data-Driven Approach to Cubesat Health Monitoring
… used by the system were validated, and ground testing was done to determine the performance, reliability, and accuracy of the system. The system was successful in the detection and identification of known anomalies in archived flight telemetry from the IPEX mission. In addition, …
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Magnetic Cleanliness, Sensing, and Calibration for CubeSats
… This thesis details the design, integration, and testing of the magnetic sensors in the AERO-VISTA Auxiliary Sensor Package (ASP). We discuss the estimation of spacecraft self-interference and implement an informal magnetic interference control process. We present some simple ground testing …
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A performance-driven experiment framework for space technology development using the International Space Station
… of replicating the space environment through ground testing. The SPHERES testbed on the International Space Station has provided a risk-tolerant test facility for evaluating enabling technology. The operational execution of the SPHERES facility has resulted in the development of best practices …
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