Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
CO-DESIGN OF THE PLANT AND CONTROLLER OF ACTIVE SUSPENSION SYSTEM USING SEQUENTIAL, ITERATIVE AND NESTED OPTIMIZATION STRATEGIES
Submission Author:
Stefany Dutra , SC
Co-Authors:
Stefany Dutra, Alexandro Brito
Presenter: Alexandro Brito
doi://10.26678/ABCM.COBEM2021.COB2021-0652
Abstract
This article presents a sequential, iterative and nested optimization strategies in automotive suspension systems, in order to improve the performance of the system in terms of ride comfort and vehicle safety. In this proposal it is intended to treat the elastic constant of the spring and the damping coefficient of the damper as dependent optimization variables, relating them through geometric constraints. The main contribution of this work is the realization of the co-design of automotive suspension systems considering parametric uncertainties in the parameters of the plant to obtain the robust controller of dynamic output feedback. The H-infinity control problem is formulated using linear matrix inequalities. The study is based on the quarter car model with two degrees of freedom. The performance of the co-design is evaluated by computer simulations and compared with an active design. The road irregularities are represented by the speed bump input. The vertical acceleration over the sprung mass is used to evaluate ride comfort, while the vehicle safety is measured through the contact force between the tire and the track. The simulation shows the effectiveness of the sequential, iterative and nested co-design methods and their advantage, in terms of optimizing of ride comfort and vehicle safety, compared to active design.
Keywords
Automotive Suspension, Sequential Strategy, Iterative Strategy, Nested Strategy, Linear Matrix Inequalities
