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 5 of 5 for “"variable time-step"”.
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Online trajectory planning for UAVs using mixed integer linear programming
… while also attempting to decrease solution time. A variable time step size, linear interpolation points, and horizon minimization techniques are used to enhance the capability of the online path planner. In this thesis, the concept of variable time steps is extended to the receding horizon, …
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Observer based fault detection in DC-DC power converters
… today are limited in their operational lifetimes, which can have negative consequences for critical systems which depend on power electronic to stay functional. To help mitigate the effects of system failures due to power electronics, a fault detection filter has been implemented to detect …
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Analysis and Improvement of the bRAPID Algorithm and its Implementation
… analysis of the bRAPID (burnup for RAPID – Real Time Analysis for Particle transport and In-situ Detection) code system, and the implementation and validation of two new algorithms for improved burnup simulation. bRAPID is a fuel burnup algorithm capable of performing full core 3D assembly-wise …
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Finite element analysis of nitrogen species transport and transformation in the unsaturated zone
… produced improved efficiency over fixed or variable time step schemes for time integration. Hysteretic simulations with air entrapment showed that effects of hysteresis are greatly enhanced by the presence of air entrapment due to large differences in water contents between different …
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Adaptive Geometric Numerical Integration of Mechanical Systems
… In particular, we are interested in how time-step adaptivity can be achieved in conjunction with structure preserving properties without destroying the good long time integration properties which are typical for geometric integration methods. As a specific application we consider dynamic …