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 17 of 17 for “"Flight Software"”.
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Activity Node Based Flight Software as a Benefit to Systems Engineering
<p>This report discusses one application of a flight software design for a spacecraft in which the software executes from a database that can be managed by systems engineering. This report gives an overview of how such a software design can be developed and implemented. It also discusses why this …
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A flight software development and simulation framework for advanced space systems
… terrestrial computer systems employ middleware software to provide communications abstractions and reduce software interface complexity. Embedded applications are adopting the same approaches, but must make provisions to ensure that hard real-time temporal performance can be maintained. This …
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Vivid: An Operating System Kernel for Radiation-Tolerant Flight Control Software
This thesis considers the challenge of defending flight software from radiation errors without a radiation-hardened processor. A new real-time operating system, Vivid, explores the use of redundant multithreading to protect critical software components from radiation errors, and offers new …
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The New Bicycle Model: Introducing Software Considerations Early Into the Systems Engineering Design and Integration Process
… where routine tasks are encoded in their flight software. With more and more of the satellites’ functionality now being controlled by software, the present Bicycle Model becomes less and less relevant because the model doesn’t address a major component of the satellites’ design; the …
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Vehicle health monitoring using stochastic constraint suspension
… too computationally complex for NASA's manned flight software verification and validation (V&V) process. An innovative VHM algorithm is presented that addresses these weaknesses by integrating the constraint suspension technique with parity space and hypothesis testing. The approach relies on …
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BILEVEL OPTIMIZATION FOR FAST CONTROL MOMENT GYRO MANEUVERS
… methods that can be readily implemented in flight software. Full torque authority can be recovered by describing torque allocation as a constrained static optimization problem; previous efforts solved this problem by developing a set of algebraic differential equations that converge upon a …
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Onboard distributed replanning for crosslinked small satellite constellations
… using the onboard planning approach. A path to flight software integration is developed.
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In-Flight control simulation of a proposed, future microsatellite for the African Resource Management Constellation (ARMC)
… is commanded via the commercial mission control software and includes a detailed simulation of the satellite and all subsystems. The University of Cape Town testbench can be the realistic nucleus of an ARMC mission. Starting from this setup a satellite model with improved remote sensing …
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Application and management of commonality within NASA systems
… Standard Payload Rack (ISPR), and the Core Flight-Software System (CFS). Each of the case studies was chosen because it offered a diverse view into the management of commonality, by differing in the program in which the system was developed, the type of system that was developed, and the …
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Optimizing terminal conditions using geometric guidance for low-control authority munitions
… from the target and ability to achieve a steep flight path angle at the target. Many small guided munitions have limited control authority to achieve these competing objectives due to system hardware tradeoffs. This thesis develops guidance algorithm modifications that demonstrate consistent …
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Design of Flight Control Laws for a Novel Stratospheric Dual-Aircraft Platform
… of an initiative to demonstrate this novel flight concept through modeling, simulation, and flight testing at Embry-Riddle Aeronautical University (ERAU). A realistic simulation environment, described herein, was developed to support the development and testing of flight control systems. …
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Viability and Validation of Near-Passive Descent Control for Quadrotor Systems
… is designed and deployed from altitude during flight testing. The motors were unable to change directions while the quadrotor was descending. The next near-passive descent method explored makes use of motor controllers and motors capable of driving the quadrotor's rotor blades bidirectionally. …
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Adaptive Control Techniques for Transition-to-Hover Flight of Fixed-Wing UAVs
… transition a fixed-wing UAV to and from hover flight. Software modifications were made to the ArduPilot firmware to add hover flight modes using both Proportional, Integral, Derivative (PID) Control and Model Reference Adaptive Control (MRAC) with the goal of making the controllers robust …
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A Data-Driven Approach to Cubesat Health Monitoring
… lab. This system is integrated into PolySat's flight software and provides real time health monitoring of the spacecraft during its mission. Any anomalies detected are reported and further analysis can be done to determine the cause. The system can also be used for the analysis of archived …
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ENABLING THE TEST AND EVALUATION OF AUTONOMOUS FUNCTIONS THROUGH STANDARDIZATION OF UAS INTEGRATION
… from laboratory environments toreal-world flight testing remains limited by regulatory constraints, hardware compatibility challenges, and the absence of standardized interfaces between autonomy software and flight control systems. These limitations are particularly significant for research …
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Collaborative competition for crowdsourcing spaceflight software and STEM education using SPHERES Zero Robotics
… as a technique to develop small-scale spaceflight software by issuing open calls for solutions to large crowds of people with the incentive of prizes. There is widespread investment of resources in the fields of Science, Technology, Engineering, Mathematics (STEM) education to improve STEM …
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Fine-pointing system development and photometric precision assessment for the transiting exoplanet survey satellite
… developed to assess the attitude determination flight software as well as to quantify the attitude determination performance of the instrument cameras during key mission scenarios. This framework allows the attitude determination system to be significantly improved, leading to a reduction in …