Time response analysis in suspension system design of a high-speed car

Cosmas Pandit Pagwiwoko

doi:10.1117/12.851304

14 April 2010 Time response analysis in suspension system design of a high-speed car

Cosmas Pandit Pagwiwoko

Proceedings Volume 7522, Fourth International Conference on Experimental Mechanics; 752244 (2010) https://doi.org/10.1117/12.851304
Event: Fourth International Conference on Experimental Mechanics, 2009, Singapore, Singapore

Abstract

A land speed record vehicle is designed to run on a flat surface like salt lake where the wheels are normally made from solid metal with a special suspension system. The suspension is designed to provide a stable platform to keep the wheel treads on tract, to insulate the car and the driver from the surface irregularities and to take part of good handling properties. The surface condition of the lake beds is basically flat without undulations but with inconsistent surface textures and ridges. Spring with nonlinear rate is used with the reason that the resistance builds up roughly proportional to the aerodynamic download for keeping the height more nearly constant. The objective of the work is to produce an efficient method for assisting the design of suspension system. At the initial step, the stiffness and the damping constants are determined based on RMS optimization by following the optimization strategy i.e. to minimize the absolute acceleration respect to the relative displacement of the suspension. Power bond graph technique is then used to model the nonlinearity of the components i.e. spring and dashpot of the suspension system. This technique also enables to incorporate the interactions of dynamic response of the vehicle's body with aerodynamic flow as a result of the base excitation of the ground to the wheels. The simulation is conducted on the platform of Simulink-MATLAB and the interactions amongst the components within the system are observed in time domain to evaluate the effectiveness of the suspension.

Citation Download Citation

Cosmas Pandit Pagwiwoko "Time response analysis in suspension system design of a high-speed car", Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 752244 (14 April 2010); https://doi.org/10.1117/12.851304

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KEYWORDS

Aerodynamics

Motion models

Modeling

Systems modeling

Computer aided design

Solids

Mathematical modeling

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