Variable Caster Steering

Alberding, Matthäus B.; Onder, Christopher H.; Sager, Frank; Guzzella, Lino

doi:10.1109/tvt.2013.2287765

Cited by 3 publications

(4 citation statements)

References 9 publications

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“…It can clearly be seen that, there is no difference between the generated camber values derived from the homogeneous transformation method and the multibody model for different steering pivot's orientations. By contrast, the gained camber using Alberding formula and Dixon formula only show good agreement with that of the multibody model when there is no KPI angle or the steering angle is very small; 13,19 when there is a KPI angle and the steering angle is relatively large the camber values significantly differ from the multibody data. The comparison convinces that the kinematics of the steered wheel developed here using the homogeneous transformation is mathematically…”

Section: Validation Of Tyre Kinematicsmentioning

confidence: 67%

“…Equations (12), (19) and (29) show that both caster and KPI angle affect the camber of a steered wheel. In comparison with KPI, however, caster is much more effective to create the camber.…”

Section: Variable Caster Steering Strategymentioning

confidence: 99%

“…We also compare the results with those developed by Alberding and Dixon. 13,19 For the sake of mathematical exactness, the comparison was made over the steering angle range from 0°to 360°, which is much greater than for practical steering angles.…”

Section: Validation Of Tyre Kinematicsmentioning

confidence: 99%

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Variable caster steering in vehicle dynamics

Marzbani

Fard

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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When a car is cornering, its wheels usually lean away from the centre of rotation. This phenomenon decreases lateral force, limits tyre performance and eventually reduces the vehicle lateral grip capacity. This paper proposes a strategy for varying caster in the front suspension, thereby altering the wheel camber to counteract this outward inclination. The homogeneous transformation was utilised to develop the road steering wheel kinematics which includes the wheel camber with respect to the ground during a cornering manoeuvre. A variable caster scheme was proposed based on the kinematic analysis of the camber. A rollable vehicle model, along with a camber-included tyre force model, was constructed. MATLAB/Simulink was used to simulate the dynamic behaviour of the vehicle with and without the variable caster scheme. The results from step steer, ramp steer, and sinusoidal steer inputs simulations show that the outward leaning phenomenon of the steering wheels equipped with the variable caster, is reduced significantly. The corresponding lateral acceleration and yaw rate increase without compromising other handling characteristics. The actively controlled car, therefore, provides better lateral stability compared to the passive car. The tyre kinematic model and the vehicle dynamic model were validated using multibody and experimental data.

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Section: Validation Of Tyre Kinematicsmentioning

confidence: 67%

Section: Variable Caster Steering Strategymentioning

confidence: 99%

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Variable caster steering in vehicle dynamics

Marzbani

Fard

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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show abstract

“…Vo et al 15 established kinematic model of a steerable tire with a variable caster and calculated position vector of kingpin axis and displacement coordinates of wheel center. Alberding et al 16 detailed explained the position relations between kingpin and wheel and through coordinate transformation, calculated vector of steering wheel center and tire-print center. Vo et al 17 proposed a kind of strategy for varying caster in the front suspension and calculated wheel steering model in the condition of variable and constant camber angle.…”

Section: Introductionmentioning

confidence: 99%

Solution of steering angle based on homogeneous transformation

Kou¹,

Zhang²,

2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Steering Angle is related to the design and optimization of steering mechanism and suspension, but it is not equal to the angle of knuckle around kingpin because of the existence of wheel alignment parameters. To calculate the steering angle, this paper derives based on homogeneous transformation its function expression by analyzing spatial geometric relation between the two angles and calculating coordinates related to steering trajectory of wheel center. Then, multi-body model of McPherson suspension with steering system is built and the calculation correctness is verified by comparing the function curve plotted by MATLAB software with the curve simulated by Adams/Car software. The calculation and simulation indicate that between the two angles, there is a ratio which is related to wheel alignment parameters and greater than 1.

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Homogeneous Transformation and Kinematics of a Steering Tyre

Marzbani

et al. 2018

Advances in Engineering Research and Application

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Variable Caster Steering

Cited by 3 publications

References 9 publications

Variable caster steering in vehicle dynamics

Variable caster steering in vehicle dynamics

Solution of steering angle based on homogeneous transformation

Homogeneous Transformation and Kinematics of a Steering Tyre

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