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 124 for “"vehicle model"”.
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Vehicle model-based filtering for spacecraft attitude determination
This thesis investigates the use of vehicle model-based filtering for spacecraft attitude determination. Whereas traditional navigation filters typically rely only on the kinematic relations between body rate and attitude in their filter designs, the state estimator presented here expands the plant …
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Optimal symmetric flight with an intermediate vehicle model
Optimal flight in the vertical plane with a vehicle model intermediate in complexity between the point-mass and energy models is studied. Flight-path angle takes on the role of a control variable. Range-open problems feature subarcs of vertical flight and singular subarcs as previously studied. The …
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Control Design for a Non-Minimum Phase Hypersonic Vehicle Model
Air-breathing hypersonic vehicles are emerging as a method for cost-efficient access to space. Great strides have recently been made in the field of hypersonic vehicles, however the unique dynamics of the vehicles present challenges for control design. In this thesis, a nonlinear controller for a …
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Eight Degree of Freedom Vehicle Model with Pitch, Yaw, Tire Control and Sensor Inputs
… on the development of an eight degree of freedom vehicle model in the MATLAB computing language. Its purpose is to provide flexibility in the modeling and implementation of signal inputs and crash avoidance logic while maintaining accuracy in the physics of the vehicle’s motion. Firstly, the …
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On the Control Aspects of Semiactive Suspensions for Automobile Applications
… of a two-degree-of freedom quarter-car model, using passive and semi-active dampers, along with a seven-degree-of-freedom full vehicle model. The behaviors of the semi-actively suspended vehicles have been evaluated using skyhook, groundhook, and hybrid control policies, and compared to …
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Development of a vehicle robotic driver with intelligent control system modelling for automated standard driving-cycle tests
New road vehicles are required to undergo several specific tests to meet the requirement set by governing bodies in various markets. These tests are often carried out over specific driving-cycles. To carry out lab-based driving-cycle tests, a typical vehicle manufacturer will employ a trained …
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Vehicle Dynamic Model for Real-Time Applications and Training of Artificial Drivers
This thesis presents the development of a full vehicle model tailored for real-time simulation applications. A comprehensive modular simulation framework is developed with the primary goal of providing an accurate and flexible vehicle model for real-time simulations. The vehicle model is developed …
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A closed-loop driver/vehicle directional dynamics predictor
The highway safety related to vehicle operation on the road is a complex function of dynamic interactions between the vehicle, the driver and the environment. The safety dynamics of a heavy vehicle thus relates to not only its directional stability and control limits, but also the control …
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Terrain sensing and estimation for dynamic outdoor mobile robots
… detection. The first method utilizes a dynamic vehicle model to estimate robot velocity and explicitly estimate longitudinal wheel slip. The vehicle model utilizes a novel simplified tire traction/braking force model in addition to estimating external resistive disturbance forces acting on the …
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Parameter Selection for Improved Handling Performance of Automated Vehicles
With the increasing popularity of autonomous vehicles, much research has been done focusing on vehicle vision and tracking ability, but the handling performance of the vehicle itself is still important, especially under emergency circumstances. However, production vehicles are developed with the …
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Development of a Dynamic Simulation of an Automobile that Incorporates Four Wheel Steering and a Driver Model
… thesis, the development of a four-wheel steering vehicle dynamics model and the implementation of a driver controller are detailed. The model is intended to be used for supporting research in the cybersecurity of conventional and autonomous road vehicles. It incorporates a 10 degree-of-freedom …
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Public housing authorities and the challenge of developing affordable housing : the case of the Cambridge Housing Authority
… the housing issues. This paper explores a two-vehicle model as a conceptual framework for high-performing PHAs to increase the supply of affordable housing in their communities. The first vehicle is the creation of a nonprofit affiliate, which allows PHAs to act more like private developers. …
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Analysis on actuator dynamics in active wheelsetcontrol
… systems, for primary suspensions of the railway vehicles, and the effects of actuator dynamics on the overall active control system. The research is focused on the use of electric–mechanical (EM) actuators and it addresses on two main aspects when designing active control systems for this …
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Semi-active control for independently rotating wheelset in railway vehicles with MR dampers
… of the independently rotating railway vehicles. This research focuses on using MR damper and it addresses on three main aspects when designing semi-active control systems for this application.One aspect is magnetorheological dampers categorised as a controllable fluid damper which can …
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Crash avoidance by electronic stability control on Australian high speed rural roads: an analysis of braking interventions.
… Electronic Stability Control (ESC) to passenger vehicles. The greatest benefit to Australia is for crashes on high speed rural roads that occur due to a loss of control. An investigation of what variables in the South Australian statewide crash database are associated with high injury severity …
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Modeling and testing of an improved 8x8 scaled electric combat vehicle
The current 8x8 combat vehicle pertaining to multi-wheeled vehicles indicates a lack of effort in developing advanced multi-steering electric drive vehicle. Therefore, novel steering scenarios for an 8x8 scaled electric combat vehicle that features maintaining individual wheel’s steering and speed …
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Modeling and performance analysis of ABS systems with nonlinear control
… slip values are iterated from a nonlinear tire model based on the Magic Formula. Simulations of hard braking and steering maneuvers are conducted using the nonlinear Yaw-plane Four-wheel steering vehicle model with Limited Roll motion (YFLR) incorporating the nonlinear Magic Formula tire model …
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