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 “"Ride Quality"”.
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Effects of stabilizer bars on road vehicle ride quality
… the effects of such stabilizer bars on ride quality. The purpose of the research is to determine the need for further studies in the area of active roll stabilizer systems. Two dynamic vehicle models are developed: the simplified front-car model and the full-vehicle-body …
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Dynamic analysis of a tracked snowplowing vehicle and assessment of ride quality
… removing snow from the sidewalks, pose severe ride environment for the drivers, primarily arising from road wheel-track-terrain interactions. The drivers of such vehicles are thus exposed to a comprehensive magnitude of low frequency whole-body vibrations. Exposure to such large amplitude low …
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Effects of Frame Design and Cab Suspension on the Ride Quality of Heavy Trucks
… trucks were investigated to see their effects on ride comfort. Four trucks were used in this study, each with a different frame: a factory low frame, a lightweight low frame, a factory high frame, and a lightweight high frame. There were two different frame heights and three thicknesses. Two …
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Dynamic analysis of a modern urban bus for assessment of ride quality and dynamic wheel loads
… over hung design are known to cause poor ride quality and excessive pavement loads. Such performance is partly due to the present status of urban roads and their rapid deterioration. On the other hand, variations in the dynamic tire forces of such vehicles are known to be a cause for …
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Design for Ride Quality – Knowledge Transfer of Advanced Dynamics of Passenger Transportation Systems in Buildings for a Multi-cultural/Multi-discipline R&D Environment
This research study combines two comprehensive subjects. It considers novel knowledge about advanced machine dynamics of cabins of multi-car Passenger Transportation Systems (PTS) and the interaction of learning preferences and modern communication channels to propose a state-of-the-art concept for …
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An analytical study of ride and handling performance of an interconnected vehicle suspension
… involves a difficult compromise among the ride, handling and directional control performance characteristics. While a soft suspension is desired to enhance ride quality, hard suspension springs are required to achieve good handling and directional control performance. Auxiliary roll …
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Analysis of the Use of Probe Vehicles for Road Infrastructure Data Analysis
… in-vehicle sensors in order to describe road ride quality. Data collection was performed at the Virginia Smart Road using two instrumented vehicles. The gathered information was compared to road profile data collection, which is the current state-of-the-practice in ride quality assessment. …
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Central Tire Inflation for Agricultural Vehicles
… the theoretical benefits that CTIS would have on ride quality, traction, and compaction. In addition to the theory, a central tire inflation system and instrumentation to measure performance were installed on a tractor and used to evaluate the vehicle performance on several hard surfaced test …
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Analysis and Development of Control Methodologies for Semi-active Suspensions
… with neural networks to help improve vehicle ride metrics significantly. In this study, a novel approach is introduced to analyze and fine-tune semi-active suspension control algorithms. In some cases, such as military trucks moving on off-road terrains, it is critical to keep the vehicle ride …
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A computational approach to the prediction of wheel wear profiles
… vehicle running is important for safety and ride quality. In this work, a wear model based upon the work done in the wheel/rail contact patch is used to predict wheel wear profiles. The effects of train dynamic response, random rail alignment and the non-linearity of wheel/rail contact …
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Durability Analysis of Helical Coil Spring in Vehicle Suspension Systems
… supports the vehicle's road stability and ride quality by scaling down the vibration responses resulting from road surface's roughness. This research focuses on fatigue life analysis of coil spring component. Static linear analysis is conducted on the 3D model of helical coil spring to …
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Improvement of semi-active control suspensions based on gain-scheduling control
… vehicle in this study and the improvements in ride quality are evaluated with several different track data. For the purpose of performance comparison, a semi-active controller based on skyhook damping control integrated with MR dampers and also a vehicle with passive suspensions are used as the …
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Road Profiler Performance Evaluation and Accuracy Criteria Analysis
… functional characteristics because it affects ride quality, operation cost, and vehicle dynamic load. There are many types of devices that measure the road profile, which is often used to compute different smoothness indices. The development of performance-based specifications and pavement …
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Design of a rugged wheel for application in the Leveraged Freedom Chair
… world and one specifically for American riders. The functional requirements of performance and price, were designated by the start-up company Global Research Innovation and Technology (GRIT), which makes the LFC. This study includes comparisons between the original rubber wheel, which is …
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Systemansatz zur Untersuchung und Beurteilung des Abrollkomforts von Kraftfahrzeugen bei der Überfahrt von Einzelhindernissen
This work deals with ride quality over artificial single obstacles in terms of perceived noise and vibration. Next to the road obstacles (cleats, plates, holes) also driving speed and suspension are varied. Different methods are used to analyse the data: Components of the suspensions are studied …
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Optimal suspension damping and axle vibration absorber for reduction of dynamic tire loads
… analogy between the dynamic wheel loads and the ride quality performance characteristics of heavy vehicles is established through analysis of a linear quarter-vehicle model to illustrate the potential benefits of optimal damping. A weighted optimization function comprising the dynamic load …
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Design Optimization of MagneShock Magnetorheological Shock Absorbers and Development of Fuzzy Logic Control Algorithms for Semi-Active Vehicle Suspensions
Automotive ride quality and handling performance remain challenging design tradeoffs for modern, passive automobile suspension systems. Despite extensive published research outlining the benefits of active vehicle suspensions in addressing this tradeoff, the cost and complexity of these systems …
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Design and Construction of Pavements in Cold Regions: State of the Practice
… distress, structural deterioration, and poor ride quality. Because the availability of naturally occurring non-frost-susceptible pavement base materials is rapidly diminishing in many areas while project budgets remain largely inadequate, pavement engineers are utilizing alternative materials …
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