Abstract
This paper proposes the new speed control method of electric vehicles by generating the longitudinal speed pattern for improving the ride comfort against the longitudinal acceleration/deceleration. Since the longitudinal acceleration/deceleration of EVs causes the discomfort of passengers, reducing such bad effect of acceleration/deceleration acting on passengers is very important for not only the ride comfort of passengers but also vehicle running safety. The proposed method is applying the general optimal control theory and it generates the speed pattern for improving the passenger ride quality based on evaluating the variations of acceleration and the jerk which is time derivative of the acceleration. The effectiveness of the present method is demonstrated through numerical experiments compared with some conventional methods.
Highlights
In recent years, with the wide spread of internal-combustion engine vehicles (ICEVs) all over the world, the environment and energy problems are going severely
Since the longitudinal acceleration/ deceleration of electric vehicles (EVs) causes the discomfort of passengers, reducing such bad effect of acceleration/deceleration acting on passengers is very important for the ride comfort of passengers and vehicle running safety
In the case of EVs, it is important to evaluate the ride comfort with respect to lateral speed change. In relation to this point, there are [15] and [16] as the study which investigated the relation between the acceleration/deceleration, the jerk and ride quality
Summary
With the wide spread of internal-combustion engine vehicles (ICEVs) all over the world, the environment and energy problems are going severely. The development of next-generation vehicles such as hybrid vehicles (HVs) and electric vehicles (EVs) has been focused. EVs have attracted great interests as a powerful solution against the problems. EVs are automobiles which are propelled by electric motors, using electrical energy stored in batteries or another energy storage device. Electric motors have several advantages over ICEs [1] [2] [3] [4]: Energy efficient.
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