Simos A. Evangelou

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dvances in modeling bicycle and motorcycle dynamics are providing improved understanding of the principal modes of motion under straight-running and steady-state cornering conditions; see, for example , [1] and the references therein. These studies show that under certain operating conditions, some of the machine's modes can be lightly damped or even(More)
— Using a first-principles approach, the constituent components of a series hybrid electric car are modelled and integrated to form an overall coupled dynamic model. Controllers for the individual components are constructed, and are combined with a load follower supervisory controller and driver model to enable simulation of the vehicle under general(More)
— This paper develops an indirect optimal control methodology to achieve green driving optimisation for series hybrid electric vehicles. Starting from a given vehicle mission, specified in terms of a road journey that has to be completed in a given amount of time, the power sharing among the powertrain sources and the vehicle speed profile along the journey(More)
Burst oscillations can arise in racing motorcycles under a combination of high speeds, low roll angles and firm acceleration. This bursting occurs at weave-mode frequencies under conditions that cause the classical wobble and weave modes interact. Under race conditions this phenomenon can undermine rider confidence, and is consequently detrimental to lap(More)
— The authors investigate the dynamical behaviour of a Duolever type of suspension on a standard sports motorcycle. The paper contains the modelling aspects of it, as well as the optimization process followed in order to obtain the suspension parameters and geometry arrangements. Head angle, wheelbase and normal trail are studied as indicators of the(More)
— This paper proposes a new concept of car active suspension that shows significant advantages with respect to previous systems. The Active Variable Geometry Suspension (AVGS) is based on a passive suspension, in which an extra link/chain of linkages is connected in series to the spring damper unit. One servo-motor per wheel is used to continuously and(More)