Establishing the State Function to Determine the Turning Radius of the Vehicle When Steering

Nguyen, Tuan Anh; Binh, Hoang Thang; Thang, Tran Van

doi:10.13189/ujme.2020.080207

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…If the roll angle is larger, the difference will also be larger. Once the roll angle of the vehicle reaches the limited value ϕ max , that is, the vertical force of the wheel will reach the minimum value F z = 0, and the rollover phenomenon will occur [13,14]. With the same steering angle, if the vehicle can roll, the higher the speed, the lower the limited roll angle.…”

Section: Introductionmentioning

confidence: 99%

Using a novel fuzzy 3-inputs algorithms to control the active hydraulic stabilizer bar with the complex model of the vehicle nonlinear dynamics

Nguyen

2023

PLoS ONE

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Under the influence of centrifugal force, the rollover phenomenon may occur. The vehicle rolls over when the wheel is completely separated from the road surface, i.e., the vertical force of the wheel is reduced to zero. To overcome this problem, the active stabilizer bar is used at the front and rear axles of the vehicle. The active stabilizer bar works on the difference in fluid pressure inside the hydraulic motor. This article is aimed at studying the vehicle rollover dynamics when the hydraulic stabilizer bar is used. In this article, the model of a complex dynamic is established. This is a combination of the model of spatial dynamics, the model of nonlinear double-track dynamics, and the nonlinear tire model. The operation of the hydraulic actuator is controlled by a fuzzy algorithm with 3-inputs. The defuzzification rule is determined based on the combination of 27 cases. The process of calculation and simulation is done with four specific cases corresponding to steering angles. In each case, three situations were investigated. Besides, the speed of the vehicle is also gradually increased from v1 to v4. As a result of the simulation, which was performed in the MATLAB-Simulink environment, the output values such as roll angle, change of the vertical force, and roll index were significantly reduced when the active stabilizer bar was used. If the vehicle does not use the stabilizer bar, the vehicle may roll over in both the second, third, and fourth cases. If the vehicle uses a mechanical stabilizer bar, this also occurs in the third and fourth cases (only at a very high velocity, v4). However, the rollover phenomenon did not occur if the vehicle used a hydraulic stabilizer bar controlled by the fuzzy 3-inputs algorithm. In all investigated cases, the stability and safety of the vehicle are always guaranteed. Besides, the responsiveness of the controller is also very good. An experimental process needs to be conducted to verify the correctness of this research.

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Section: Introductionmentioning

confidence: 99%

Using a novel fuzzy 3-inputs algorithms to control the active hydraulic stabilizer bar with the complex model of the vehicle nonlinear dynamics

Nguyen

2023

PLoS ONE

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“…However, its accuracy is not high. The linear tire model is only valid when an automobile is traveling at a low velocity and the steering angle is small [20]. The linear tire model can be incorporated with a linear single-track or nonlinear double-track dynamics model [21].…”

Section: Introductionmentioning

confidence: 99%

Establishing a Nonlinear Mathematical Model to Simulate the Vehicle Oscillation

Nguyen¹,

Nguyen²

2023

MMEP

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The content done in this article is the problems with the vehicle's rollover dynamics when steering. In this article, a complex dynamics model is established, which fully includes the influence of external factors. This complex model combines the models of spatial dynamics (7 DOFs -degrees of freedom), nonlinear double-track dynamics (3 DOFs), and the Pacejka nonlinear tire model. The simulation and calculation process are done by the MATLAB-Simulink application. The input parameters of the oscillation problem include the steering angle and velocity of the vehicle. These values are adjusted based on three specific cases and three situations. The output values that can evaluate the vehicle's oscillations include the roll angle, vertical force, and a trajectory of the vehicle. The results of the article have shown the oscillation of an automobile in all investigated cases. As a consequence of these findings, the vehicle's oscillation is greatest when the speed and steering angle reach their maximum values. When the vehicle was steered in "Fishhook" mode, the vehicle rolled over at v2 = 70 (km/h) and v3 = 80 (km/h). The limited roll angle corresponding to these two situations are 9.41˚ and 9.26˚, respectively. Under the influence of the tire's nonlinear deformation, the vehicle's motion trajectory also changes greatly. This model should be used for research problems involving motion trajectories and vehicle rollover.

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Establishing the State Function to Determine the Turning Radius of the Vehicle When Steering

Cited by 2 publications

References 9 publications

Using a novel fuzzy 3-inputs algorithms to control the active hydraulic stabilizer bar with the complex model of the vehicle nonlinear dynamics

Using a novel fuzzy 3-inputs algorithms to control the active hydraulic stabilizer bar with the complex model of the vehicle nonlinear dynamics

Establishing a Nonlinear Mathematical Model to Simulate the Vehicle Oscillation

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