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Proceedings Paper

Design of a preview active vehicle suspension based on an enhanced PID control with nonlinear differentiator and wheelbase preview
Author(s): Xinzheng Huang; Zhengchao Xie
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Paper Abstract

This work sets up an active suspension with wheelbase preview information for a half-car model. A sensor placed on the front suspension can collect and feed forward the road information as an input to the rear suspension system. Then, an enhanced PID controller combined with a nonlinear differentiator is used to process the obtained road information signal from the sensor on the front suspension and the feedback signal of vehicle state. The application of PID control with nonlinear differentiator (ND) is aimed to improve system robustness against the noise, and this improvement is verified by compared with regular PID control scheme. The numerical example shows that the PID control with nonlinear differentiator provides more stable results than regular PID control in the presence of noise. Also, simulation shows that with preview information considered, the front and rear wheel unsprung mass accelerations are both decreased when compared with the regular PID control suspension, thus better riding comfort is obtained. And then, the developed active suspension system is tuned by using Genetic Algorithm (GA) to obtain an optimum configuration on several design parameters.

Paper Details

Date Published:
Proc. SPIE 7977, Active and Passive Smart Structures and Integrated Systems 2011, 797713; doi: 10.1117/12.881516
Show Author Affiliations
Xinzheng Huang, Univ. of Macau (Macao, China)
Zhengchao Xie, Univ. of Macau (Macao, China)

Published in SPIE Proceedings Vol. 7977:
Active and Passive Smart Structures and Integrated Systems 2011
Mehrdad N. Ghasemi-Nejhad, Editor(s)

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