Title: Optimization of vehicle ride characteristics by means of Box's method

Authors: C.N . Spentzas

Addresses: Professor (adj.), National Technical University of Athens, Zografou Campus, 15780 Athens, Greece

Abstract: Box|s method is used to determine the elastic and damping characteristics of a vehicle suspension that optimize the ride properties of a car. A seven degrees of freedom vehicle model is used. By this method, it is possible to consider springs and dampers with non-linear characteristics. An objective function that takes into consideration vertical and rotational accelerations of the vehicle was used, permitting the optimization of ride characteristics. Also, by adding a term in the objective function related to the dynamic tyre load variation, we can simultaneously optimize the handling behaviour of the vehicle. Moreover, constraints were used in order to limit all the important design parameters of the problem (the suspension working space, the elastic characteristics of the springs and damping characteristics or the dampers) to acceptable values from the engineering point of view. The method is illustrated by a numerical example.

Keywords: Box algorithm; optimisation; ride characteristics; vehicle suspension; elasticity; damping; vehicle suspension; ride comfort; vehicle modelling; vehicle handling; vehicle design.

DOI: 10.1504/IJVD.1993.061853

International Journal of Vehicle Design, 1993 Vol.14 No.5/6, pp.539 - 551

Available online: 28 May 2014 *

Full-text access for editors Access for subscribers Purchase this article Comment on this article