Identification of the Forces in the Suspension System of a Race Car Using Artificial Neural Networks
The suspension system together with the chassis of the car play an important role in the performance of a race car. The knowledge of the forces that are transmitted through the car’s suspension system allows a better adjustment and optimization of various
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Identification of the Forces in the Suspension System of a Race Car Using Artificial Neural Networks Luis Roseiro, Carlos Alcobia, Pedro Ferreira, Abderrahmane Baı¨ri, Najib Laraqi, and Nacim Alilat
Abstract The suspension system together with the chassis of the car play an important role in the performance of a race car. The knowledge of the forces that are transmitted through the car’s suspension system allows a better adjustment and optimization of various structural components. In this study, an identification method, with a neural network based methodology, was tested using experimental data in order to identify and quantify the horizontal and vertical forces in the wheel hub, which are transmitted to the triangle of the suspension and to the chassis of the car. The obtained results are promising and show that it is possible to use this methodology for real-time monitoring of horizontal and vertical forces acting on the triangle suspension of the formula student car.
44.1
Introduction
The car chassis optimization is a matter that has been widely treated properly from several different points of view, with many papers and works analyzing the optimization of parts or systems of the vehicle. These have included instance joints [1], suspension elements [2, 3], wheels [4], seats [5] crashworthiness and frame [6], and so on. In race car engineering, out of F1 environment, most of the teams do not have the time or resources in order to develop intense theoretic optimization tasks in car designing and setting up. In general we can assess that the main design objective of a race car frame is increasing structural stiffness in order to improve the general
L. Roseiro (*) • C. Alcobia • P. Ferreira Mechanical Engineering Department, Coimbra Institute of Engineering, Rua Pedro Nunes – Quinta da Nora, 3030-199 Coimbra, Portugal e-mail: [email protected]; calcobia @isec.pt; [email protected] A. Baı¨ri • N. Laraqi • N. Alilat LTIE, EA 4415, GTE, Universite´ Paris Ouest, 50 Rue de Se`vres, F-92410 Ville d’Avray, France e-mail: [email protected]; [email protected]; [email protected] A. Madureira et al. (eds.), Computational Intelligence and Decision Making: Trends and 469 Applications, Intelligent Systems, Control and Automation: Science and Engineering 61, DOI 10.1007/978-94-007-4722-7_44, # Springer Science+Business Media Dordrecht 2013
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Fig. 44.1 Phisec formula student car
dynamic response, knowing that a highly deformable frame will induce uncontrolled and non-adequate movements. It is well known that the ultimate part that defines a race car handling, acceleration and braking abilities are the tires. The suspension system controls the way tires are in contact with the track to provide maximum grip [7]. Nevertheless, a suspension system cannot work properly if it is not connected to a good frame, which is the element that connects the rest of the vehicle. An appropriate design means that the chassis interacts properly with all other systems in the car, but also achieves certain requirements
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