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Modelling Of The Viscoelastic Relaxation Of A Stowed Telescope Starshade, Rahul Raghu
Modelling Of The Viscoelastic Relaxation Of A Stowed Telescope Starshade, Rahul Raghu
Graduate Thesis and Dissertation 2023-2024
The Habitable Worlds Telescope Starshade is an occulting disk that orbits in tandem with a telescope that occludes and diffuses the light from stars to observe the relatively dim exoplanets in orbit around them. It achieves this in part with tailored petals that diffuse light to soften the light from the star. Due to the relative sizes of the star and the planet, NASA considers the shape stability of the Starshade's petals to be a Key Technology Gap. The Starshade is developed to be a deployable composite structure that folds on itself to fit within modern rockets. Due to the …
Acausal Modeling Of Wind Turbines With Validation And Control Studies, Kazi Ishtiak Mohsin
Acausal Modeling Of Wind Turbines With Validation And Control Studies, Kazi Ishtiak Mohsin
Graduate Thesis and Dissertation 2023-2024
This thesis involves the modeling, validation, and control studies of a Control-Oriented, Reconfigurable, and Acausal Floating Turbine Simulator (CRAFTS), that is currently under development. CRAFTS uses Modelica®, an object-oriented, declarative, multi-domain modeling language for physical system modeling in the Dymola environment. The CRAFTS simulator facilitates rapid dynamic simulation of wind turbines with various model variants and enables control co-design.
A major emphasis of this thesis is in the validation of the CRAFTS simulator for a 15-MW land-based wind turbine through several test cases. These test cases were collaboratively developed in conjunction with other participating research entities. CRAFTS has undergone rigorous …