USE OF THE INERTER DEVICE IN AUTOMOTIVE SUSPENSIONS: PARAMETRIC STUDY

Resumo

The inerter appears as an innovative mechanical device capable of generating a resistance force
proportional to the relative acceleration between its two terminals, so that the proportionality constant is called
inertia and, like an element of mass, is measured in kilograms. (kg). Its properties support the purpose of
suspension systems to promote the reduction of vibration levels and the maintenance of stability and adherence of
a vehicle in front of a series of road profiles, as they allow the addition of inertia to a dynamic system without a
significant increase in mass. In this work, a parametric study of the properties of an inerter spring damper (ISD)
suspension coupled to a 1⁄2 vehicle model is carried out using the response map technique. The influence of
stiffness, damping and inertia parameters on vibration levels are evaluated for a random road profile. The response
maps are derived from the frequency domain model comparing the performance of the passive inert suspension
system and the conventional passive system. The analysis consider the main performance indicators of these
systems in terms of comfort, stability and adherence and simulations were carried out in MATLAB software.