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Analysis of vehicles driving maneuvers at low coefficient of adhesion
Šabík, Matúš ; Sedlák, Robert (referee) ; Tokař, Stanislav (advisor)
This master’s thesis deals with driving maneuvers at low coefficient of adhesion, especially in winter season. It includes a list of adhesion coefficients on many surfaces, published by various authors. Figures were through the use of statistical methods divided into normal and exceeding. There are described terms having impact on adhesion. For determination of adhesion was used tests like emergency braking, circle test and slalom. The major part contains specification of used vehicles, surfaces, weather conditions, measuring devices and realized tests. In addition to using accelerometer, there was a successful attempt to use timekeeping facilities to determine deceleration of vehicle. Acquired data were processed and compared to another publications.
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Selected Issues of Motorcyclist's Behavior
Sedláček, Jan ; Bradáč, Albert (referee) ; Semela, Marek (advisor)
This thesis focuses on the braking systems of modern motorcycles. It describes the design details mainly concerning braking systems, ABS, semi-active chassis, but also the MSC stability control system. The experimental part deals with the measurement, analysis of the braking decelerations of motorcycles and evaluation, among others, whether the ABS system reduces the braking distance on dry road. Nine motorcycles were used to measure this issue. All models tested had ABS or the newer ABS system with built-in MSC stability control. Braking progress was analysed from initial speeds of 50 and 70 km/h to a straight-line stop with ABS applied and with ABS deactivated. The results were plotted graphically and can be used to provide information about the actions of the rider and the motorcycle itself. Braking distances, MFDD, initial speeds were calculated. In this study, the video recordings of braking are analyzed and compared with the measured data. The data can be useful for the analysis of single-track vehicle accidents.
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Analysis of vehicles driving maneuvers at low coefficient of adhesion
Šabík, Matúš ; Sedlák, Robert (referee) ; Tokař, Stanislav (advisor)
This master’s thesis deals with driving maneuvers at low coefficient of adhesion, especially in winter season. It includes a list of adhesion coefficients on many surfaces, published by various authors. Figures were through the use of statistical methods divided into normal and exceeding. There are described terms having impact on adhesion. For determination of adhesion was used tests like emergency braking, circle test and slalom. The major part contains specification of used vehicles, surfaces, weather conditions, measuring devices and realized tests. In addition to using accelerometer, there was a successful attempt to use timekeeping facilities to determine deceleration of vehicle. Acquired data were processed and compared to another publications.
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