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Showing 1 to 14 of 14 for “"road roughness"”.
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Influence of road roughness and directional maneuvers on the dynamic performance of heavy vehicles
… to highway safety and preservation of the roadways. The directional dynamics of articulated heavy vehicles is investigated to study the influence of road roughness on the directional performance measures and the road damage potentials of the vehicle undergoing a directional maneuver. The …
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The analysis and simulation of the spectral and statistical properties of road roughness for package performance testing
… but is ultimately caused by fluctuations in the road surface. This thesis introduces a universal analysis and classification methodology for discretely sampled road profile data. It originates from the premise that current laboratory simulation of the transport environment, which utilises vehicle …
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Identifying customer usage profiles of two-wheeled vehicles
… occurring wheel forces. Therefore, the current road slope and the vehicle mass are estimated using a Kalman filter. The resulting wheel forces are subsequently counted with the rainflow method. The validation was achieved by the comparison of measurements with wheel-load transducers. The second …
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Error Mitigation in Roughness Measurements
Road roughness is an important factor in determining the quality of a stretch of road. The International Roughness Index, a specific measure of road roughness, is widely used metric. However, in order to measure roughness, an accurate road profile must exist. To measure the roads, terrain profiling …
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Active Vibration Isolation Using an Induced Strain Actuator with Application to Automotive Seat Suspensions
… to vibration is discussed. Characteristics of road roughness are discussed and used to implement a representative test input to a passenger seat system. extsc{Matlab} is used to model the car seat and vehicle system with four degrees of freedom to determine actuator requirements. Selection and …
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A Discrete Roughness Index for Longitudinal Road Profiles
Engineers of off-road equipment, on-road vehicles, pavement, and tires must assess the roughness of a terrain surface for the design of their products. The International Roughness Index (IRI), a standardized means of assessing longitudinal road roughness, quantifies roughness based on the average …
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Dynamic analysis of a tracked snowplowing vehicle and assessment of ride quality
… 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 frequency vibration limits the performance abilities of …
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Dynamic analysis of a modern urban bus for assessment of ride quality and dynamic wheel loads
… 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 acceleration of road damage and are strongly related to vibration modes of the vehicle associated with …
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Characterization and Modeling of Deformable Soils for Tire Performance Simulations
… role in the optimization and design of off-road machinery used for agricultural, defense, construction, and mining applications. The tire-road interaction studies focus solely on road roughness and friction between rubber and asphalt while assuming the road surface to be rigid. However, for …
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Measuring and evaluating log truck performance in a variety of operating conditions
… associated with operations on sand and gravel roads. The third study documented significant performance differences between routes delivering to one location even where road surface differences were minimal. A fourth, detailed study illustrated speed and fuel consumption differences between …
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Road Features Extraction Using Terrestrial Mobile Laser Scanning System
… key contributions we have made in the field of road feature extraction from LiDAR data. We detail the development of three automated algorithms for the extraction of road features from terrestrial mobile LiDAR data. LiDAR data is a rich source of 3D geo-referenced information whose volume and …
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Development of mechanistic rolling resistance model for pavement life cycle assessment
… GHG emissions results from the operation of on-road vehicles. An average American drives 26.9 miles per day and nearly 65 percent of freight by weight is transported by trucks, a demand that makes building and maintaining an adequate roadway infrastructure crucial for the national economy. The …
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Effect of roughness-induced dynamic wheel loading on flexible pavements
Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2025-05-01