Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
ANALYSIS OF THE SUSPENSION ENERGY HARVERSTING POTENTIAL BY MEANS A 9 DOF NON-LINEAR TRUCK MODEL
Submission Author:
Augusto Schmidt Lenz , RS
Co-Authors:
Augusto Schmidt Lenz, João Gabriel Benedito Duarte, Mariana Damm Poli, Eduardo André Perondi
Presenter: Augusto Schmidt Lenz
doi://10.26678/ABCM.COBEM2023.COB2023-1146
Abstract
Vehicle regenerative suspension is a widely studied field today. They usually consist of systems capable of harvesting energy from suspensions, which would normally be wasted through heat dissipation. The present work aims to analyze the simulation responses of the truck suspension to determine the potential available to be collected. For that purpose, equations are developed considering a 9 degrees of freedom (DOF) model, including the displacement in the vertical axis for all mobile suspension parts and pitch and roll for the truck body. The phase differences of the excitation signals for each of the axles are considered taking into account the horizontal distances between the axes. The wheel movement is calculated according to a truck velocity profile, and the variation of this velocity is also used to determine the pitch angle, which simulates a break or acceleration situation. A simulation model was programmed in MATLAB/Simulink and actual parameters values were supplied. In the simulation model, stiffness and damping behaviors are defined by lookup tables, given the non-linearity of those, which utilize actual components data to determine the forces related to suspension dynamic behavior. Road profiles are calculated according to ISO 8608 Standard, considering road types A, B and C, which were defined as the most operational cases. With the results obtained, an analysis of the forces, velocities, displacements, and energetic potential is made, allowing to determinate the most important frequencies of excitation suitable for harvesting, maximum and mean values of force, velocity, energetic power and the amplitude of the oscillation between the dampers from different axes, highlighting the conditions in which the use of a regenerative suspension would be more adequate to harvest energy. These parameters can be used to compare different systems of energy harvesting, given that the maximum potential simulated can be used as a reference for maximum energy available on that type of suspension.
Keywords
Truck suspension, energy harvesting, ISO 8608, simulink, Numerical simulation
