1,721,028 research outputs found
Controllo di robot industriali con compensazione delle non-linearità del modello dinamico
No full textA City Car for Restricted Urban Trafic: Innovative Actuation and Manoeuvrability
No full text. Environmental compatibility requires artefact and service technological sustainability, so that prescriptions become cue for further innovation. The city-car case is considered, investigating the advantages of four independently powered wheels and exploring how actuation redundancy could be used to grant proper manoeuvrability, at least, within the expected duty range. The feasibility is shown by computer simulation (based on a 14-degrees-of-freedom model of the dynamics) and hints on the control opportunities are sketched in view of further developments
Restricted Urban Traffic Guidance of District-Dispatchers with Four Powered Wheels
No full textn° 3/4 Marzo-April
The Tyre-Soil Effects on the Manoeuvrability of a City-Car
No full textEco-compatibility aims at drastic changes of people transportation means and, to grant proper mobility levels, the electrically-powered city-car concept provides effective solutions. This quite obviously leads to distributed actuation, with separately driven wheels and inconsistencies appear unless redundancy and tyre/road interaction are properly mastered. The paper deals with the dynamics of such kind of vehicle moving from the behaviour of driven wheels (with compliant tyre and varying soil interactions); then a twin powered axle or train are investigated, as basic reference to describe the dynamics of a four wheels platform, driven by redundant actuation on varying friction soils. On these premises, a city car manoeuvre stability can be stated for low speed tasks over urban roads. Results are obtained, after modelling the wheel dynamics, with resort to computer simulation, based on the SIMULINK package; the kinematics constraints are introduced and the varying tyre-soil coupling conditions are relate d with the driving torque options
The conceptual design of a parallel kinematics manipulator for high speed assembly
No full textR.M. Molfino Edito
Development and Simulation Assessment of a Modular Assembly Facility for Automotive Derivation Boxes
No full textThe paper deals with an economics of scope case looking after balanced mix of production flexibility and leanness joined to total quality and mass-production effectiveness. The study is based on virtual plant assessments (by means of virtual engineering) and considers industrial artefacts (automotive components) aiming at economics of scale figures on tactical horizons, but undergoing fast updating requests and quick response adaptivity on strategic horizons; the sought solution profits of shop-floor resources modularity; example simulation issues are given, in view of dispatching lay-out and scheduling
Personal full electric vehicle PICAV: Non linear dynamic model and simulation (Article)
No full textRequest of sustainable personalized transport is growing in different areas of service robotics, for aid to mobility of elderly and motion disabled people, for freight delivery in urban environment, for passengers transport in restricted zones as airports and greens because of the small dimensions, tiny footprint, on-board intelligence, friendly human car interface and zero environmental impact. The paper studies the feasibility of an electric vehicle with four non steering wheels considering as driving principle the skid steering that has been mainly used for tracked vehicles.The vehicle is a complex nonlinear multi body system with numerous mobilities either in stiff and in elastic motion. For evaluating the vehicle performances, the maneuverability and stability behavior it is needed the availability of a model able to describe all the significant motion modes in different operative conditions. The paper presents the PICAV model and some results of the simulation campaign that demonstrated its soundness and reliability. © 2015, North Atlantic University Union NAUN. All rights reserved
The Robo-Ranger Project: Styling and Concept Design
No full textBaldanzini, Carfagni, Giannelli, Poggi Ed
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