Harvesting energy from vehicle suspension
Arizti, Marcos (2010)
2010
Konetekniikan koulutusohjelma
Automaatio-, kone- ja materiaalitekniikan tiedekunta
This publication is copyrighted. You may download, display and print it for Your own personal use. Commercial use is prohibited.
Hyväksymispäivämäärä
2010-06-02
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tty-201006081151
https://urn.fi/URN:NBN:fi:tty-201006081151
Tiivistelmä
This Master of Science thesis studies the energy harvesting in vehicle suspension. The aim of this work is to implement an efficient energy harvesting system without disturbing driver’s comfort. This thesis analyzes the most relevant methods of energy harvesting and selects the ones which can be implemented in vehicle suspension. The main goal is that by using this system there is a decrease in the consumption of the fuel in the vehicle.
The thesis is divided in three sections. In the literature study section different principles of harvesting energy are explained. The most relevant ways to harvest energy are considered in this section mainly in the macro energy harvesting. In the second section three principles of implementation are considered. The selection focuses on the possibility to implementing it into the vehicle suspension. Furthermore, a comparison between them is done in terms of efficiency, resistance, reliability and simplicity is done. The hydraulic system is the most suitable one. In last section, which deals with the simulation, four models are considered, starting from the simple one with one degree of freedom, and ending with a four degree of freedom model that improve accuracy. The simulation indicates that the introduction of the energy harvesting system increases the vertical acceleration of the chassis as the vehicle passes over a bump. The human being behavior against vertical acceleration settles a restrictive limit that the vehicle has to obey. Modification in the velocity and mass could help to reduce the maximum value of the acceleration cause by the energy harvesting system.
The results of this study suggest that, by considering the hydraulic energy harvesting system the vertical acceleration in the chassis of the vehicle is going to increase but that it is not necessarily harmful for the human being. It is necessary to find the balance between the amount of energy that can be harvested and the comfortableness of the driver. This can be achieved by making use of the damping factor of the model. /Kir10
The thesis is divided in three sections. In the literature study section different principles of harvesting energy are explained. The most relevant ways to harvest energy are considered in this section mainly in the macro energy harvesting. In the second section three principles of implementation are considered. The selection focuses on the possibility to implementing it into the vehicle suspension. Furthermore, a comparison between them is done in terms of efficiency, resistance, reliability and simplicity is done. The hydraulic system is the most suitable one. In last section, which deals with the simulation, four models are considered, starting from the simple one with one degree of freedom, and ending with a four degree of freedom model that improve accuracy. The simulation indicates that the introduction of the energy harvesting system increases the vertical acceleration of the chassis as the vehicle passes over a bump. The human being behavior against vertical acceleration settles a restrictive limit that the vehicle has to obey. Modification in the velocity and mass could help to reduce the maximum value of the acceleration cause by the energy harvesting system.
The results of this study suggest that, by considering the hydraulic energy harvesting system the vertical acceleration in the chassis of the vehicle is going to increase but that it is not necessarily harmful for the human being. It is necessary to find the balance between the amount of energy that can be harvested and the comfortableness of the driver. This can be achieved by making use of the damping factor of the model. /Kir10