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Analysis of a Flow Volume Regulated Frame Steering System and Experimental Verifications

IRSST Montreal-P. E. Boileau
Concordia University-Yuming Yin, Subhash Rakheja
Published 2015-09-29 by SAE International in United States
The articulated frame steering (AFS) systems are widely implemented in construction, forestry and mining vehicles to achieve enhanced maneuverability and traction performances. The kinematic and dynamic performances of articulated steered vehicles are strongly influenced by properties of the frame steering system. In this paper, a flow volume regulated frame steering system is described and analytically modelled. The analytical model of the steering system is formulated in conjunction with yaw-plane model of a 35 tonnes mining vehicle to investigate steady as well as transient responses of the steering system and the vehicle. A field test program was undertaken to measure responses of the steering system and the vehicle under nearly constant speed turning as well as path-change maneuvers. The validity of the vehicle and the steering system model is demonstrated on the basis of the measured data in terms of steering wheel angle, articulation angle, hydraulic struts pressure, struts displacements and vehicle yaw rate. The results revealed reasonably good agreements between the measured and model responses under the maneuvers considered. The model could thus serve as…
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