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Showing 1 to 16 of 16 for “"Road Profile"”.
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The development of a road profile measuring device with reference to endurance testing of motor vehicles
… the development of a device to measure the profile of a road. The data describing the roads characteristics are used to compare the qualities of the test tracks at present used by Volkswagen SA (Pty) Ltd for endurance testing of their products, and the Synthetic Road used on their new …
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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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The Development of Measurement and Characterization Techniques of Road Profiles
… excitation to a vehicle's chassis system is the road profile. Simulating a vehicle traversing long roads is impractical and a method to produce short roads with given characteristics must be developed. By understanding the characteristics of the road, a reduced set of models can be created from …
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Road Surface Measurement and Multi-Scale Modeling of Rubber Road Contact and Adhesion
A major challenge in tire, as well as in road engineering, is to understand the intricate mechanisms of friction. Pavement texture is a feature of the road surface that determines most tire-road interactions, and can be grouped into two classes: macro-texture, resulting mainly in the hysteretic …
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Identification and Characterization of Damaging Road Events
… is, firstly, there is a large pool of possible roads for a user to drive along, for example, there are over 4 million miles of public roads in the United States, alone [1]. In addition, while measurements of these surfaces could be collected it would be impractical for two reasons, the first is …
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Road Profiler Performance Evaluation and Accuracy Criteria Analysis
Road smoothness is one of the most important road 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 …
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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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Real-Time Anticipatory Suspension Control for Single Event Disturbances
… and an adaptive system to generate optimal force profiles. This introductory research succeeded and proved the used approach to be very promising. However, the used adaptive system was not designed to operate in real-time and did not show any correlation between different road profiles. Therefore, …
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Analysis of the Use of Probe Vehicles for Road Infrastructure Data Analysis
… also known as probe vehicles, to collect road infrastructure data. This concept was demonstrated by measuring vertical acceleration using in-vehicle sensors in order to describe road ride quality. Data collection was performed at the Virginia Smart Road using two instrumented vehicles. The …
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Preview based Semi-Active Suspension Control
… suspensions help improve the ride comfort and road holding capacity of the vehicle, they tend to be reactive in nature and thus leave a lot of room for improvement. Incorporating road preview data allows these suspensions to become more proactive rather than reactive and helps achieve a higher …
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Rollover prevention and path following of a scaled autonomous vehicle using nonlinear model predictive control
… Vehicle instability can occur due to unexpected road profile changes, during full braking, obstacle avoidance or severe manoeuvring. Three main instability phenomena can be distinguished: the yaw-rate instability, the rollover and the jack-knife phenomenon. The main goal of this study is to …
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Identifying customer usage profiles of two-wheeled vehicles
… of methods for identifying customer usage profiles of two-wheeled vehicles utilising the vehicle’s onboard sensors. It comprises three papers that have been published to relevant journals. At present, regarding the automotive industry, customer usage profiles are mostly unknown in …
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Control and simulation of an active suspension system
… by simulating the trailer response under road profile inputs. The nonlinear half car model with MIMO PD) with sky hook damping and ATVA under white noise excitation was employed for this purpose. It has been shown that the combination can provide both ride comfort and handling. A PC based …
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Emergency Braking in Compact Vehicle Platoons: A Cyber-Physical Design
… the advent of autonomous driving, concepts like road trains or platoons are becoming more popular. In these arrangements, vehicles travel at separations of only 5 to 10m between them. These short inter-vehicle distances allow compacting vehicle flows resulting in increased throughput on highways. …
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Development of a smartphone application to measure pavement roughness and to identify surface irregularities
… (IRI), which is often measured using inertial profilers. Inertial profilers are equipped with sensitive accelerometers, a height measuring laser, a distance measuring instrument, etc., to measure pavement profile. Modern smartphones are equipped with a number of sensors including a three-axis …