Search results for "motorcycle"
showing 8 items of 18 documents
Comfort-structural analysis in product development Optimization of a motorcycle frame
2012
This work steps from a bachelor thesis, joining the results of a study about the dynamic loads to evaluate the comfort loss in the motorcycle during the usage, with the potentiality of a modern FEM software. The goal is the development of a new methodology for structural optimization of motorcycle’s frame. In many of cases the success of the structural optimization is linked with a two factors combination: the software and the strength of the engineer to condition the mathematical problem, defining parameters domain and technological constraints. A good alternative to the traditional load hypothesis linked to historical data or instrumental measurements is focused in this paper. Consistent …
Motorcycle Hill Climbing. Sport e social media in prospettiva globale
2021
Motorcycle Hill Climbing. Sport and social media in a global perspective. The contribution aims to reconstruct the history, rules and diffusion of the Motorcycle hill climbing (MHC) sport; inserted among the categories of Enduro competitions, the MHC represents an extreme discipline divided into championships organized all over the world. The article, starting from a descriptive approach, will try to give a picture of the spatial diffusion of the main MHC events and the public flows generated, focusing in particular on the main European competitions. The article will then explore the relational and community dynamics that develop in some of the social networking platforms dedicated to the d…
Stochastic analysis of motorcycle dynamics
2011
Off-road and racing motorcycles require a particular setup of the suspensions to improve the comfort and the safety of the rider, maintaining a continuous contact between the road and the motorcycle (by means of the tires). Further, because of the ground roughness, in the case of offroad motorcycle, suspensions usually experience extreme and erratic excursions (suspension stroke) in performing their function. In this regard, the adoption of nonlinear devices can, perhaps, limit both the acceleration experienced by the sprung mass and the excursions of the suspensions. This leads to the consideration of asymmetric nonlinearly-behaving suspensions. This option, however, induces the difficulty…
2014
A feedback control method based on an extended state observer (ESO) method is implemented to vibration reduction in a typical semiactive suspension (SAS) system using a magnetorheological (MR) damper as actuator. By considering the dynamic equations of the SAS system and the MR damper model, an active disturbance rejection control (ADRC) is designed based on the ESO. Numerical simulation and real-time experiments are carried out with similar vibration disturbances. Both the simulation and experimental results illustrate the effectiveness of the proposed controller in vibration suppression for a SAS system.
Motorcyclists Safety System to avoid Rear End Collisions based on Acoustic Signatures
2017
International audience; In many Asian countries, motorcyclists have a higher fatality rate as compared to other vehicles. Among many other factors, rear end collisions are also contributing for these fatalities. Collision detection systems can be useful to minimize these accidents. However, the designing of efficient and cost effective collision detection system for motorcyclist is still a major challenge. In this paper, an acoustic information based, cost effective and efficient collision detection system is proposed for motorcycle applications. The proposed technique uses the Short time Fourier Transform (STFT) to extract the features from the audio signal and Principal component analysis…
FACTORES HUMANOS ASOCIADOS A LOS ACCIDENTES MORTALES DE MOTOCICLETAS SCOOTER EN ESPAÑA
2017
Resumen Los accidentes de motocicleta son uno de los problemas de seguridad vial más importantes a nivel mundial. Hay una escasez de estudios específicos sobre las características de la accidentalidad de las motocicletas de tipo scooter, motivada por la falta de una definición precisa de este tipo de motocicleta y de la identificación de los distintos tipos de vehículos de dos ruedas en los registros de accidentes. El objetivo de este trabajo es determinar las características de los 293 conductores de motocicletas scooter fallecidos en España durante el periodo 2006-2011. Se realizaron análisis descriptivos y de asociación en función de la naturaleza de las variables. Los resultados de los …
What makes a champion? : motorcycle world champions' recipe for success
2011
This thesis explores what are the factors that impact the success in motorcycle racing. The subject is relevant to investigate since there have not been many scientific researches of motorcycle sport and the factors behind the success. Fifty-four motorcycle World Champions from 16 different countries and representatives of the six most successful motorcycle sport countries answer to the research question: “What makes a champion in motorcycle sport?” It is also investigated how the society influences the success in motorcycle sport and how the federations and clubs could improve their training programmes. The empirical data was collected by interviewing the experts in the field of elite-leve…