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Effect of terrain roughness on the roll and yaw directional stability of an articulated frame steer vehicle

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Effect of terrain roughness on the roll and yaw directional stability of an articulated frame steer vehicle. / Pazooki, Alireza; Rakheja, Subhash; Cao, Dongpu.

In: SAE International Journal of Commercial Vehicles, Vol. 6, No. 2, 2013, p. 325-339.

Research output: Contribution to journalJournal article

Harvard

Pazooki, A, Rakheja, S & Cao, D 2013, 'Effect of terrain roughness on the roll and yaw directional stability of an articulated frame steer vehicle', SAE International Journal of Commercial Vehicles, vol. 6, no. 2, pp. 325-339. https://doi.org/10.4271/2013-01-2366

APA

Vancouver

Author

Pazooki, Alireza ; Rakheja, Subhash ; Cao, Dongpu. / Effect of terrain roughness on the roll and yaw directional stability of an articulated frame steer vehicle. In: SAE International Journal of Commercial Vehicles. 2013 ; Vol. 6, No. 2. pp. 325-339.

Bibtex

@article{c8a0be6964b54cdc8ac802b412b022b1,
title = "Effect of terrain roughness on the roll and yaw directional stability of an articulated frame steer vehicle",
abstract = "Compared to the vehicles with conventional steering, the articulated frame steer vehicles (ASV) are known to exhibit lower directional and roll stability limits. Furthermore, the tire interactions with relatively rough terrains could adversely affect the directional and roll stability limits of an ASV due to terrain-induced variations in the vertical and lateral tire forces. It may thus be desirable to assess the dynamic safety of ASVs in terms of their directional control and stability limits while operating on different terrains. The effects of terrain roughness on the directional stability limits of an ASV are investigated through simulations of a comprehensive three-dimensional model of the vehicle with and without a rear axle suspension. The model incorporates a torsio-elastic rear axle suspension, a kineto-dynamic model of the frame steering struts and equivalent random profiles of different undeformable terrains together with coherence between the two tracks profiles. The simulations are performed to determine the stability limits of the ASV models while operating on different terrains, namely: a perfectly smooth surface, plowed field, pasture, gravel road, and the MVEE random course. The directional stability limits are defined in terms of the static and dynamic rollover thresholds, rearward amplification ratio, and critical speed corresponding to snaking instability under steady and transient steering inputs. The results suggest that the tire interactions with the rough terrains affect the stability limits of both the unsuspended and suspended vehicles in a highly adverse manner. The suspended vehicle responses, however, show less sensitivity to variations in the road roughness profile.",
author = "Alireza Pazooki and Subhash Rakheja and Dongpu Cao",
year = "2013",
doi = "10.4271/2013-01-2366",
language = "English",
volume = "6",
pages = "325--339",
journal = "SAE International Journal of Commercial Vehicles",
issn = "1946-391X",
publisher = "SAE International",
number = "2",
note = "SAE 2013 Commercial Vehicle Engineering Congress ; Conference date: 01-10-2013 Through 03-10-2013",

}

RIS

TY - JOUR

T1 - Effect of terrain roughness on the roll and yaw directional stability of an articulated frame steer vehicle

AU - Pazooki, Alireza

AU - Rakheja, Subhash

AU - Cao, Dongpu

PY - 2013

Y1 - 2013

N2 - Compared to the vehicles with conventional steering, the articulated frame steer vehicles (ASV) are known to exhibit lower directional and roll stability limits. Furthermore, the tire interactions with relatively rough terrains could adversely affect the directional and roll stability limits of an ASV due to terrain-induced variations in the vertical and lateral tire forces. It may thus be desirable to assess the dynamic safety of ASVs in terms of their directional control and stability limits while operating on different terrains. The effects of terrain roughness on the directional stability limits of an ASV are investigated through simulations of a comprehensive three-dimensional model of the vehicle with and without a rear axle suspension. The model incorporates a torsio-elastic rear axle suspension, a kineto-dynamic model of the frame steering struts and equivalent random profiles of different undeformable terrains together with coherence between the two tracks profiles. The simulations are performed to determine the stability limits of the ASV models while operating on different terrains, namely: a perfectly smooth surface, plowed field, pasture, gravel road, and the MVEE random course. The directional stability limits are defined in terms of the static and dynamic rollover thresholds, rearward amplification ratio, and critical speed corresponding to snaking instability under steady and transient steering inputs. The results suggest that the tire interactions with the rough terrains affect the stability limits of both the unsuspended and suspended vehicles in a highly adverse manner. The suspended vehicle responses, however, show less sensitivity to variations in the road roughness profile.

AB - Compared to the vehicles with conventional steering, the articulated frame steer vehicles (ASV) are known to exhibit lower directional and roll stability limits. Furthermore, the tire interactions with relatively rough terrains could adversely affect the directional and roll stability limits of an ASV due to terrain-induced variations in the vertical and lateral tire forces. It may thus be desirable to assess the dynamic safety of ASVs in terms of their directional control and stability limits while operating on different terrains. The effects of terrain roughness on the directional stability limits of an ASV are investigated through simulations of a comprehensive three-dimensional model of the vehicle with and without a rear axle suspension. The model incorporates a torsio-elastic rear axle suspension, a kineto-dynamic model of the frame steering struts and equivalent random profiles of different undeformable terrains together with coherence between the two tracks profiles. The simulations are performed to determine the stability limits of the ASV models while operating on different terrains, namely: a perfectly smooth surface, plowed field, pasture, gravel road, and the MVEE random course. The directional stability limits are defined in terms of the static and dynamic rollover thresholds, rearward amplification ratio, and critical speed corresponding to snaking instability under steady and transient steering inputs. The results suggest that the tire interactions with the rough terrains affect the stability limits of both the unsuspended and suspended vehicles in a highly adverse manner. The suspended vehicle responses, however, show less sensitivity to variations in the road roughness profile.

U2 - 10.4271/2013-01-2366

DO - 10.4271/2013-01-2366

M3 - Journal article

VL - 6

SP - 325

EP - 339

JO - SAE International Journal of Commercial Vehicles

JF - SAE International Journal of Commercial Vehicles

SN - 1946-391X

IS - 2

T2 - SAE 2013 Commercial Vehicle Engineering Congress

Y2 - 1 October 2013 through 3 October 2013

ER -