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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 39 for “"vehicle simulation"”.
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Hybrid electric vehicle simulation
Made available in DSpace on 2012-11-02T21:21:17Z (GMT). No. of bitstreams: 2 license.txt: 4923 bytes, checksum: 3568ab34bde24044ec8ea05b1192aa03 (MD5) 4153819_opt.pdf: 37771882 bytes, checksum: acec85bf5840de7ff94bf91b43d77d9e (MD5) Previous issue date: 1997
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Variable Bus Voltage Modeling for Series Hybrid Electric Vehicle Simulation
… these future technologies is the hybrid electric vehicle (HEV), typically featuring both an internal combustion engine and an electric motor, with the goal of producing fewer emissions while obtaining superior fuel economy. While vehicles such as the Virginia Tech designed and built HEV Lumina …
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Development and validation of a modular hybrid electric vehicle simulation model
… and analysis to the design process, accurate simulation programs are crucial. Most hybrid electric vehicle hybrid electric vehicle (HEV) simulation programs are written for very specific component configurations and only allow changes in component sizes. These programs prove helpful only if …
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Mission planning and remote operated vehicle simulation in a virtual reality interface
Virtual reality simulations are finding applications in a wide range of disciplines such as surgical simulation, electronics training, and crime scene investigation. During the Mars Pathfinder Mission, in summer 1997, NASA scientists unveiled a new application of virtual reality for the …
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Finite Element Modeling Of Tire-Terrain Dynamic Interaction For Full Vehicle Simulation Applications
… rim-tire combination is very important in full vehicle simulations, as well as for the tire design process. Tire maneuvers are either quasi-static, such as steady-state rolling, or dynamic, such as traction and braking. The rolling of the tire over obstacles and potholes and, more generally, …
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Engine modelling for virtual mapping. Development of a physics based cycle-by-cycle virtual engine that can be used for cyclic engine mapping applications, engine flow modelling, ECU calibration, real-time engine control or vehicle simulation studies.
… be used for any engine. A spark ignition engine simulation (SIES) framework was developed in MATLAB SIMULINK to form the base of a complete high fidelity cycle-by-cycle simulation model with its major target to provide an environment for virtual engine mapping procedures. Some experimental …
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Model-Based Design of an Electric Powertrain Vehicle; Focus on Physical Modeling of Lithium-ion Batteries
Formula SAE (FSAE) vehicle systems are very complex. Understanding how subsystems effect the overall vehicle is essential for making design trade-offs. FSAE is a competitive environment. Teams need to have reliable and high performing vehicles to do well in competition. The Virginia Tech (VT) FSAE …
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Static Tire Characterization for Race Vehicle Setup
… tire models that are used in computer simulations of vehicle dynamics, a tire test rig is designed and manufactured which attaches to an MTS kinematics and compliance machine. This test rig is developed for the purpose of characterizing the loaded radius, overturning moment, and …
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Trajectory optimization for a fixed trim re-entry vehicle using direct collocation with nonlinear programming
… for a class of fixed-trim atmospheric re-entry vehicles. A four degree-of-freedom vehicle model is introduced and appropriate environmental models are chosen and implemented. Software is developed to discretize the optimal control problem using a direct collocation method. The resulting …
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Modeling and control of a four wheel drive Formula SAE car
… the MIT team built its first four wheel drive vehicle. The new architecture requires more robust and performant control systems. One major challenge is that the vehicle is not functional for the majority of the year. A longitudinal vehicle simulation was written and tested for the purpose of …
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Incorporating thruster dynamics in the control of an underwater vehicle
The dynamics of an underwater vehicle are greatly influenced by the dynamics of the thrusters. Precise control, for example to perform repeatable survey or coordinated vehicle/manipulator control, should incorporate knowledge of thruster dynamic behavior. An energy-based lumped parameter model of …
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Consistent Depth Estimation in Data-Driven Simulation for Autonomous Driving
… for viewpoint reconstruction in data-driven simulation, combining aspects of learning-based monocular depth prediction and structure-from-motion to increase temporal video depth accuracy. We demonstrate efficacy in VISTA, an end-to-end autonomous vehicle simulation engine capable of training …
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A simulation-based assessment of plug-in hybrid electric vehicle architectures
Plug-in hybrid electric vehicles (PHEVs) are vehicles that utilize power from both an internal combustion engine and an electric battery that can be recharged from the grid. Simulations of series, parallel, and split-architecture PHEVs, as well as parallel and split PHEVs with ultracapacitors, were …
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Driving segments analysis for energy and environmental impacts of worsening traffic
… growing worse. With the worsening traffic, the vehicle's fuel consumption and pollutant emissions will inevitably increase. As such, this thesis aims to quantitatively evaluate the energy and environmental impacts of worsening traffic on individual vehicles and the U.S. light-duty vehicle fleet, …
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Understanding the challenges in HEV 5-cycle fuel economy calculations based on dynamometer test data
… additional complexities for hybrid electric vehicles, because although they are required to have charge-balanced batteries over the course of a full drive cycle, they may have net charge or discharge within the individual phases. The fundamentals of studying battery charge-balance are …
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A Hybrid Soft Soil Tire Model (HSSTM) For Vehicle Mobility And Deterministic Performance Analysis In Terramechanics Applications
… terrain operations are essential for performing vehicle simulations. Assessment of the forces and moments that occur at the tire-terrain interface, and the effect of the tire motion on properties of the terrain are crucial in understanding the performance of a vehicle. In order to model the …
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Developing a HIL-Based Software Platform for Testing Electric and Hybrid Vehicle Powertrains
… for the evaluation of electric and hybrid vehicle powertrains under realistic driving conditions. The traction inverter and dc/dc converter are two crucial subsystems of the powertrain and new prototypes require significant validation before implementing into production vehicles. As …
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Verification of a six-degree of freedom simulation model for the REMUS autonomous underwater vehicle
… of modular, low-cost autonomous underwater vehicles (AUVs) in such applications as long-range oceanographic survey, autonomous docking, and shallow-water mine countermeasures requires improving the vehicles' maneuvering precision and battery life. These goals can be achieved through the …
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Efficient ranging-sensor navigation methods for indoor aircraft
Unmanned Aerial Vehicles are often used for reconnaissance, search and rescue, damage assessment, exploration, and other tasks that are dangerous or prohibitively difficult for humans to perform. Often, these tasks include traversing indoor environments where radio links are unreliable, hindering …
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Verification of a six-degree of freedom simulation model for the REMUS autonomous underwater vehicle
… of modular, low-cost autonomous underwater vehicles (AUVs) in such applications as long-range oceanographic survey, autonomous docking, and shallow-water mine countermeasures requires improving the vehicles' maneuvering precision and battery life. These goals can be achieved through the …
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