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 23 for “"lateral acceleration"”.
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Optimal passive nonlinear damper design methodology for road race application
… for road race application to maximize vehicle lateral acceleration is developed here using optimization techniques. The method includes use of equations-of-motion for suspension models, assembly of equations in a computer model for simulation, identification of the objective function which …
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Development of a Heavy Truck Vehicle Dynamics Model using Trucksim and Model Based Design of ABS and ESC Controllers in Simulink
… the digital signals from TruckSim such as lateral acceleration, yaw rate and tractor speed into suitable analog signals which serve as inputs to the control module. For this simulation, the wheel speed signals coming from TruckSim were converted into an analog signal of sinusoidal form …
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Experimental Evaluation of Roll Stability Control System Effectiveness for A-double Commercial Trucks
… speed-induced rollovers. Sensing the trailer lateral acceleration, RSC activates the trailer brakes to reduce speed and lower the likelihood of rollover. However, a limited number of past studies have shown that the trailer roll angle may provide an earlier indication of a pending rollover …
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Dynamic Understeer Control Using Active Rear Toe
… radius to change. By changing this radius, the lateral acceleration can be controlled, therefore the understeer of the vehicle can be controlled. The controls scheme is a sliding mode control, specifically a hyperbolic tangent boundary layer and a type 1 zeno controller. The system shows …
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Dynamic stability of an elliptical pendulum with unilateral simple supports
… configured as an elliptical pendulum with a unilaterally supported base. That is, the supports on either side can lift off the ground to allow for rollover under certain critical lateral accelerations. Two generalized coordinates are considered, one representing the angle of swing of the …
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Analysis, detection and early warning control of dynamic rollover of heavy freight vehicles
… vehicles is proposed on the basis of effective lateral acceleration (ELA) and relative rollover criterion. The absolute roll instability of heavy vehicles is further investigated using energy approach to derive the absolute rollover limits. A number of potential rollover indicators are …
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The optimization of a Formula SAE vehicle's suspension kinematics
… of outer-wheel camber while at the car's maximum lateral acceleration.
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Characterizing and Comparing the ADS Maneuver Execution Subsystem Performance of Two Vehicles
… that exercised both the longitudinal and lateral control elements of an ADS. This method was then demonstrated using two test vehicles with different control system architectures by (1) defining and injecting a ground truth trajectory into the ADS, (2) characterizing the motion control …
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Frequency-based response of damped outrigger systems for tall buildings
… buildings is known to be effective in reducing lateral drift under quasi-static wind loading. Although keeping lateral deflection below the required value is certainly important, it is found that in most tall buildings without supplementary damping, the design for stiffness is usually governed …
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Advanced Driver Assistance Systems and Older Drivers – Mobility, Perception, and Safety
… deceleration events at greater than 0.60g and lateral acceleration events at greater than 0.40g appear most associated with older adults' driving risk and are predictive of near future crash and near-crashes (CNCs) occurrence and high-risk older drivers with acceptable accuracy. These findings …
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Evaluation of Driver Performance While Making Unprotected Intersection Turns Utilizing Naturalistic Data Integration Methods
… peak/average speed, and peak longitudinal and lateral acceleration. Results indicated that visual entropy and peak speed differs amongst drivers of the three age-groups (older, middle-age, teens) in the presence of traffic in the intersecting streams while negotiating a left turn. Although not …
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Design and analysis of active aerodynamic control systems for increasing the safety of high-speed road vehicles
The lateral stability and the safety of road vehicles is dependent on the vehicle design and operating conditions. Under operating conditions such as slippery roads, high lateral acceleration and tight cornering, the forces and torques due to the interactions between the tire and road may be …
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The Application of Reinforcement Learning for Interceptor Guidance
… attackers, and typically required larger lateral acceleration commands than traditional methods. This work acts as a strong foundation for using machine learning for guiding missile interceptors, and presents both benefits and limitations of a current implementation. Proposals for future …
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A Naturalistic Driving Study for Lane Change Detection and Personalization
… vehicle parameters such as vehicle speed, lateral displacement, lateral acceleration, steering wheel angle, and lane change duration are then extracted and examined from time series data to characterize these lane-changing instances for a given driver. We have shown how these vehicle …
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Emergency braking using two independent steering actuators while maintaining directional control
… it is possible, for low to moderate levels of lateral acceleration and longitudinal deceleration, to provide performance similar to that under normal operation. Although further work needs to be done, the results confirm that it is possible to provide a reasonable level of emergency braking …
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A comparative study : the dynamic behavior of tall buildings with diagrid and hexagrid structural systems subjected to seismic loads
… high efficiency by resolving both gravity and lateral loads with the same elements. A new iteration of such tubular shell system named hexagrid was examined in this paper. The aim of the study is to evaluate the dynamic response and behavior of such systems when they are subjected to seismic …
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Energy Harvesting Hydraulically Interconnected Shock Absorber: Modeling, Simulation and Prototype Validation
… tests—are applied. The EH-HISA achieves average lateral acceleration improvements of 38% over traditional suspensions and 11% compared to a prior design (EHHIS proposed by Chen et al.) and average energy harvesting ability improvements of 133 % while maintaining acceptable anti-rolling dynamics …
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Adaptive Longitudinal and Lateral Control for Autonomous Vehicles: High-Speed Platooning of Articulated Trucks
… contribution is the development of a high-speed lateral control algorithm based on a modified clothoid controller. This lateral control framework is designed to minimize lateral acceleration (improving passenger comfort and safety) and reduce cross-track errors (CTEs) across various vehicle …
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Threat Assessment and Proactive Decision-Making for Crash Avoidance in Autonomous Vehicles
… by combining four driving features: Longitudinal acceleration, lateral acceleration, lane deviation, and velocity. A stochastic reachable set-based approach is used to model these three different driving behaviors. Two measures of threat are proposed: Current Threat and Short Term Prediction …
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Physical Encapsulation of Interface Bilayers
… interface bilayers can both survive 3-7g of lateral acceleration prior to bilayer failure, but have different modes of failure. Encapsulated DIBs tend to rupture, while unencapsulated DIBs completely separate. Physical encapsulation is also shown to permit the in situ formation of durable …
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