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International Journal of Automotive Technology > Volume 7(4); 2006 > Article
International Journal of Automotive Technology 2006;7(4): 469-475.
OPTIMAL PREVIEW CONTROL OF TRACKED VEHICLE SUSPENSION SYSTEMS
I. YOUN1, S. LEE1, M. TOMIZUKA2
1Gyeongsang National University
2University of California
3Berkeley
ABSTRACT
In this paper, an optimal suspension system with preview of the road input is synthesized for a half tracked vehicle. The main goal of this research is to improve the ride comfort characteristics of a fast moving tracked vehicle in order to maintain the driver’s driving capability. Several different kinds of preview control algorithms are evaluated with active or semi-active suspension systems. The road information estimated from the motion of the 1st road-wheel is adequate to make the best use of the preview control algorithm for tracked vehicles. The ride-comfort characteristics of the tracked vehicle are more dependent on pitching angular acceleration than heaving acceleration. The pitching motion is reduced by the suspension system with hard outer suspensions and soft inner suspensions. Simulation results show that the performance of sky-hook algorithms for ride comfort nearly follow that of full state feedback algorithms.
Key Words: Tracked vehicle, Preview information, Vibratory characteristic evaluation, Frequency response characteristics
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