Sensitivity-Based, Multi-Objective Design of Vehicle Suspension Systems

Author:

Callejo Alfonso1,García de Jalón Javier2,Luque Pablo3,Mántaras Daniel A.3

Affiliation:

1. INSIA, Universidad Politécnica de Madrid, Madrid 28031, Spain e-mail:

2. Applied Mathematics Professor ETSII and INSIA, Universidad Politécnica de Madrid, Madrid 28031, Spain e-mail:

3. Transport Engineering Professor Ingeniería e Infraestructura de los Transportes, Universidad de Oviedo, Gijón 33204, Spain e-mail:

Abstract

This article deals with the dynamic response optimization of mechanical systems, based on the computation of independent state sensitivities. Specifically, the dynamic behavior of a coach is analyzed in detail so as to improve its response in terms of handling and ride comfort behaviors. To that end, the coach is modeled as an 18DOF multibody system, whose equations of motion are posed using an efficient dynamic formulation based on Maggi's equations. Next, a direct-automatic differentiation approach for the computation of independent state sensitivities is applied. This allows one to quantify the effect of 19 design parameters on the vehicle dynamic response and to compute the design sensitivities or objective function gradients. Finally, handling and ride comfort objective functions are defined and are used to carry out a multi-objective suspension design optimization process, improving the vehicle response by 70% in an effective yet automatic way.

Publisher

ASME International

Subject

Applied Mathematics,Mechanical Engineering,Control and Systems Engineering,Applied Mathematics,Mechanical Engineering,Control and Systems Engineering

Reference25 articles.

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3. Design Optimization of Multibody Systems by Sequential Approximation;Multibody Syst. Dyn.,1998

4. Road Vehicle Modeling Requirements for Optimization of Ride and Handling;Multibody Syst. Dyn.,2005

5. Efficient Optimisation of a Vehicle Suspension System, Using a Gradient-Based Approximation Method, Part 1: Mathematical Modelling;Math. Comput. Modell.,2009

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