Simos A. Evangelou

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This paper introduces the idea of using mechanical steering compensators to improve the dynamic behavior of high-performance motorcycles. These compensators are seen as possible replacements for a conventional steering damper and comprise networks of springs, dampers, and a less familiar component called the inerter. The inerter was recently introduced to(More)
The paper presents a DC-link voltage control scheme by which the power losses associated with the power electronic converters of a series Hybrid Electric Vehicle (HEV) powertrain are reduced substantially. A DC-link commonly connects the three powertrain branches associated with series HEVs, presently interfaced by a three-phase rectifier, a threephase(More)
A supervisory control system (SCS) that maximizes the overall powertrain efficiency of a series hybrid electric vehicle (HEV) is developed. A novel approach of formulating the overall power efficiency which considers the idling losses of the engine and also characterizes separately the charging and discharging efficiencies of the battery, is proposed. These(More)
Cornering weave oscillations associated with high performance motorcycles operating at high speeds, can be reduced by controlling the geometry of the rear suspension. A conventional monoshock rear suspension arrangement is modified and extended in a way that variations of the leverage ratio between the spring damper unit and road wheel are possible by an(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)
This work is about controlling the geometry of the rear suspension to reduce cornering weave oscillations associated with high performance motorcycles operating at high speeds. The main lateral oscillations in two-wheeled vehicles are “wobble” and “weave”. The wobble mode is a steering oscillation whose frequency is normally in the range 6− 9 Hz and varies(More)