1,720,969 research outputs found
Development of a remotely-controlled electric vehicle with characterization of the ground grip
Full text linkThis thesis focuses on traction control techniques for electric vehicles with independently driven wheels . The aim is to maximise the grip of each wheel with the ground, improving the performance as well as the stability of the whole vehicle. Hence the estimation of the friction characteristic between tyres and
ground is addressed . Accurate estimat ion is required not only to control the wheels at their best working condition but also to predict their behaviour for future manoeuvres. This information could be used to calculate the braking distance or to evaluate the maximum attainable speed during cornering . A detailed knowledge of the friction characteristic would substantially improve the functionality of anti-lock braking system (ABS), anti-slip regulation (ASR),
electronic stability control (ESC) and adaptive cruise control (ACC) .
Estimation of ground characteristics and traction control for electric vehicles have been studied before, although previous research generally relies on driving manoeuvres at the limit of adhesion to obtain meaningful information about the maximum grip offered by the ground. This is not suitable during
safe driving on public roads and the present thesis addresses the problem of constantly monitoring the road conditions, and forecasting the loss of adhesion instead of waiting for it . Furthermore, my approach is robust against external forces and can be applied to vehicles on tilted grounds. Hence my novel approach supersedes previous studies that assumed the vehicle on a flat surface, mostly neglecting the effects of rolling resistance and aerodynamic drag. I also propose a framework to take into cons.ideration dynamic effects such as iner tial forces and the distribution of the gravitational force. Taking these effects into account would lead to a more reliable estimation, particularly effective on steep or bumpy roads where adhesion loss is more likely to happen . Some of this work resulted in the publication of an IEEE conference paper .
My work belongs to a larger project aiming to develop an autonomous electric vehicle whose main targets are economic and environmental sustainability. These targets led us to consider moving some of the computational require ments for the automatic guidance to a remote serve, wirelessly communicating with the vehicle. Together with this investigation1 original contributions of the project will include scene understanding solely based on stereo cameras and integration between the visual information and the vehicle dynamic response captured by the vehicle controller . My research is focused on this application, and a considerable amount of energy through my PhD went to the development of the system required to remotely control the vehicle. An extensive description of the development phase is included in this thesis
Le relazioni tra pianificazione territoriale generale e politiche di settore a scala regionale: vent'anni di esperienze nella Regione Friuli-Venezia Giulia
No full textrelazione presentata alla XIII Conferenza Italiana di Scienze Regionali, Ancona, 5-7 ottobre (preprints
Il sistema industriale del Friuli-Venezia Giulia, Indirizzi territoriali in materia di localizzazione industriale
No full text
Un piano per il 2000: l'ecosviluppo e gli strumenti della pianificazione territoriale
No full textrelazione alla Conferenza Regionale sul Territorio, Trieste 22-23 febbrai
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Gerarchie tra i centri e sistemi territoriali per la programmazione in Friuli-Venezia Giulia
No full text- …
