Abstract
Energy harvesting shock absorbers (EHSA) have made great progress in recent years, although there are still no commercial solutions for this technology. This paper addresses the question of whether, and under what conditions, an EHSA can completely replace a conventional one. In this way, any conventional suspension could be replicated at will, while recovering part of the wasted energy. This paper focuses on mimicking the original passive damper behavior by continuously varying the electrical parameters of the regenerative damper. For this study, a typical ball-screw EHSA is chosen, and its equivalent suspension parameters are tried to be matched to the initial damper. The methodology proposes several electrical control circuits that optimize the dynamic behavior of the regenerative damper from the continuous variation of a load resistance. The results show that, given a target damper curve, the regenerative damper can adequately replicate it when there is a minimum velocity in the damper. However, when the damper velocity is close to zero, the only way to compensate for inertia is through the introduction of external energy to the system.
Highlights
The future of mobility has meant that energy recovery has become more relevant in response to the growing demand for greater protection of the environment, improved air quality and optimization of resources
The novelty of the present work lies in the study of the design of an energy recovery shock absorber system (EHSA) that allows to functionally replicate the dynamic behavior of a passive shock absorber, through the possibility of actively acting on its operating parameters by electronically varying a resistance that depends on the state of the suspension
In the research presented in this manuscript, we do not consider the energy recovery component of the system and we focus on exploring different approaches to dynamically obtain the optimal value of the external resistor
Summary
The future of mobility has meant that energy recovery has become more relevant in response to the growing demand for greater protection of the environment, improved air quality and optimization of resources. The novelty of the present work lies in the study of the design of an energy recovery shock absorber system (EHSA) that allows to functionally replicate the dynamic behavior of a passive shock absorber, through the possibility of actively acting on its operating parameters by electronically varying a resistance (real or apparent) that depends on the state of the suspension. The aim of this study is to shed light on the technical possibilities offered by EHSA systems to actively modify their operating characteristics in order to replicate a specific curve of a real shock absorber as a matter of priority, while allowing energy recovery in the process.
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