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 39 for “"Vehicle Dynamic"”.
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Strain Gauge Utilization for Aerial Vehicle Dynamic Load Measurement
The strain gauge is a commonly used tool for dynamic load and strain measurement of a system. The work presented in this thesis describes the development and evaluation of strain gauges applied to both an aerodynamic decelerator system and an unmanned aerial vehicle. This thesis has three main …
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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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Finite element analysis of railway track under vehicle dynamic impact and longitudinal loads
Impact loads caused by flat spots on railcar wheels impose a major maintenance burden on railroads and can cause severe damage to both railcar and rail track components. In addition, the increasing tractive power of locomotives leads to significant increase in the longitudinal load demand in …
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The impact of advanced driver assistance systems on vehicle dynamic performance and on the driver
… and lateral controllers; their effects on the dynamic performance of the vehicle, and their impact on the driver. The current state of the art is discussed as part of an extensive literature review, which highlights prominent gaps in the published research. There is a lack of understanding as …
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A Simulator-Based Investigation of Visual, Auditory, and Mixed-Modality Display of Vehicle Dynamic State Information to Commercial Motor Vehicle Operators
… collision situations to commercial motor vehicle operators. Brake response times were measured for impending front-to-rear collision scenarios under six display configurations, two vehicle speeds, and two levels of headway. Accident occurrence was measured for impending side collision …
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Information-rich path planning under general constraints using Rapidly-exploring Random Trees
… heavily constrained) environments, with complex vehicle dynamic constraints and sensor limitations, including limited resolution and narrow field-of-view. Extensions of IRRT both for decentralized, multiagent missions and for information-rich planning with multimodal distributions are presented. …
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A Self-Sustaining, Boundary-Layer-Adapted System for Terrain Exploration and Environmental Sampling
… boundary layer. A nine degree of freedom vehicle dynamic model has been developed for the buoyancydriven glider. This model was used to illustrate anecdotal evidence of the stability and controllability of the system. A representative system was simulated to examine the energy harvesting …
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Deterministic and Stochastic Semi-Empirical Transient Tire Models
… is one of the most important components of the vehicle. It has many functions, such as supporting the load of the vehicle, transmitting the forces which drive, brake and guide the vehicle, and acting as the secondary suspension to absorb the effect of road irregularities before transmitting the …
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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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Dynamic Model of a Small Autonomous Hydrofoil Vessel
… development of a six degree of freedom nonlinear dynamic model for a single-mast fully submerged hydrofoil vehicle. The aim of the model is to aid in evaluating various model-based controllers for autonomous operation by simulating their performance before implementation in the field. Initially, …
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An analysis of the static and dynamic characteristics of a decoupled landing entry vehicle
A theoretical analysis of the static and dynamic characteristics of an entry vehicle utilizing the decoupled landing concept has been conducted. A hypersonic arbitrary-body aerodynamic computer program was used to determine the aerodynamics of the basic body. Three theories were used and compared …
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The Application of Intelligent Tires and Model Base Estimation Algorithms in Tire-road Contact Characterization
… in pavement friction and poor performance of the vehicle stability, traction and ABS controllers on the low friction surfaces are the most important factors affecting car crashes. Due to its direct relation to vehicle stability, accurate estimation of tire-road characteristics is of interest to …
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Driver behavior classification and lateral control for automobile safety systems
… the state and parameter information of the vehicle may not be available for a standard passenger car due to economical and technical limitations. This work focuses on developing three technologies (longitudinal tire force estimation, driver behavior classification and lateral control) using …
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Development of an Electronic Stability Control for Improved Vehicle Handling using Co-Simulation
… (ESC) technologies into a commercial multi-body dynamics (MBD) software for full vehicle simulations. Among various control strategies for ESC, the sliding mode control (SMC) method is proposed to develop these algorithms, as it is proven to be excellent at overcoming the effect of uncertainties …
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Enhancing roll stability and directional performance of articulated heavy vehicles based on anti-roll control and design optimization.
… the rollover stability of articulated heavy vehicles (AHVs) during high speed manoeuvres using anti-roll control systems. A 3-dimensional (3-D) linear yaw/roll model with 5 degrees of freedom is developed. Based on this model a linear quadratic regulator (LQR) controller is designed to …
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New methodologies for onboard generation of Terminal Area Energy Management trajectories for autonomous reusable launch vehicles
… greatly increases an autonomous reusable launch vehicle's capacity for recovering from unexpected disturbances or anomalous conditions. Such capability dispenses with the routine of pre-defined, mission specific trajectories and contingencies, which has been in use since the early days of the …
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Collision avoidance for multi-vehicle cooperative missions
… thesis focuses on collision avoidance for multi-vehicle coordinated missions. Building upon an existing cooperative control framework, we propose collision-avoidance methods that rely on practicably available obstacle information and allow safe operation without compromising on the mission …
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A comprehensive analytical model for pneumatic tires
… a comprehensive analytical tire model for both vehicle dynamic simulation and tire design. The model is composed of two parts--modeling of the contact mechanism and determination of the tire forces/moments. A static circular beam model is introduced for the contact mechanism, in which a tire is …
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Discrete Tire Model Application for Vehicle Dynamics Performance Enhancement
Tires are the most influential component of the vehicle as they constitute the only contact between the vehicle and the road and have to generate and transmit forces necessary for the driver to control the vehicle. The demand for the tire models are increasing due to the need to study the …
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A Three Dimensional Discretized Tire Model For Soft Soil Applications
… tire models, such as those employed in real-time vehicle dynamic simulations. At the other end of the spectrum are the very complex finite element models, such as those used in tire design. In between these extremes, various other models have been developed, at different levels of compromise …
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