Vehicle roll stability analysis considering lateral-load transfer rate

Sun, Cong; Song, Shuai; Liu, Zan

doi:10.1109/ictis.2015.7232193

Cited by 7 publications

(4 citation statements)

References 1 publication

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“…However, during a lane change, the LTR value of any axle of the tractor-semitrailer may reach ±1, a condition that could lead to the vehicle overturning due to unforeseen disturbances. Existing studies have shown that the maximum LTR value is not reached simultaneously across all axles [ 46 ]. Therefore, (19) is employed to calculate the maximum value of the absolute LTR for each axle during a lane change.…”

Section: Methodsmentioning

confidence: 99%

A rollover safety margin-based approach for quantifying the tractor-semitrailers’ emergency lane-changing response on expressway curves

Lv,

Xu,

Gao

2023

PLoS ONE

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In emergency scenarios, lane changing can provide a considerable advantage over braking by aiding in the prevention of rear-end collisions. However, executing lane changes on horizontal curves might lead to rollover collisions. This study proposes a systematic methodology for quantifying the rollover safety margin during lane-changing maneuvers by encompassing the complex characteristics of vehicle-road interactions. Specifically, an enhanced six-degree-of-freedom vehicle dynamics model was developed for a tractor-semitrailer and integrates road superelevation. Using this model, the rollover safety margin reduction rate (fS) was calculated. The fS represents the ratio of the difference between the lateral load transfer ratio margins under both reference state and emergency lane change conditions to the lateral load transfer ratio margin in the reference state. The reference state corresponds to vehicles maintaining 80 km·h-1 on a 270 m radius curve, while the emergency condition is defined as lane change durations of less than 4 seconds. The results reveal that emergency lane change maneuvers and roadway alignment significantly affect rollover safety margin. Shorter lane change duration, higher speed, and smaller radius worsen the rollover safety margin; these effects are further amplified when the lane change direction is opposite to the curve’s bending direction. When the tractor-semitrailer performs a lane change at 60 km·h-1 within a 4-second duration on a 600 m radius curve, the fS exceeds 100%, indicating an imminent rollover. Consequently, this study contributes valuable evidence to the development of more reliable and secure lane-change strategies.

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Section: Methodsmentioning

confidence: 99%

A rollover safety margin-based approach for quantifying the tractor-semitrailers’ emergency lane-changing response on expressway curves

Lv,

Xu,

Gao

2023

PLoS ONE

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“…In this study, the x-direction motion of the sprung mass is defined as a constant vehicle speed 𝑉𝑉, and because the vibration and yaw motion in the x and y directions are ignored, the motion of the sprung mass is defined by the bounce displacement, pitch angle, and roll angle. As shown in Figure 2, the sprung mass has a roll motion that rotates about a roll axis parallel to the x-axis at a distance ℎ = 476 mm vertically from the center of mass [20]. This considers the phenomenon that the lateral centrifugal force acting on the center of mass of the vehicle body located at a distance ℎ from the roll axis generates a roll moment for the vehicle body when the vehicle turns.…”

Section: 𝐹𝐹 =mentioning

confidence: 99%

Dynamic Modeling and Analysis of a Driving Passenger Vehicle

Yun¹,

Lee²,

Jang³

et al. 2023

Preprint

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This study presents a dynamic model of a passenger vehicle and analyzes its dynamic characteristics and responses. A dynamic vehicle model with seven degrees of freedom was established to analyze the behavior of a driving vehicle. The vehicle model had three degrees of freedom for the motion of the sprung mass and four degrees of freedom for the unsprung masses. For this model, the equations of motion were derived using Lagrange’s equation. To verify the model, the suspension deformations computed using the model were compared with the deformations measured through three actual vehicle driving tests which are the slalom, double lane change, and step steer tests. Furthermore, we investigated the effects of suspension stiffness, suspension damping, and anti-roll bar torsional stiffness on the dynamic characteristics and responses of the vehicle model. The developed dynamic vehicle model may help vehicle designers predict the dynamic responses of a vehicle through simulation without performing a driving test.

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“…In this study, the x-direction motion of the sprung mass is defined as a constant vehicle speed V. Since the vibration and yaw motion in the x and y directions are ignored, the motion of the sprung mass is defined by the bounce displacement, pitch angle, and roll angle. As shown in Figure 2, the sprung mass has a roll motion that rotates about a roll axis parallel to the x-axis at a distance h = 476 mm vertically from the center of mass [29]. This considers the phenomenon that the lateral centrifugal force acting on the center of mass of the vehicle body located at a distance h from the roll axis generates a roll moment for the vehicle body when the vehicle turns to the right.…”

Section: Dynamic Vehicle Modelmentioning

confidence: 99%

Dynamic Modeling and Analysis of a Driving Passenger Vehicle

et al. 2023

View full text Add to dashboard Cite

This study presents a dynamic model of a passenger vehicle and analyzes its dynamic characteristics and responses. A dynamic vehicle model with seven degrees of freedom was established to analyze the behavior of a driving vehicle. The vehicle model had three degrees of freedom for the sprung mass’s motion and four degrees for the unsprung masses. For this model, the equations of motion were derived using Lagrange’s equation. To verify the model, the suspension deformations computed using the model were compared with those measured through three actual vehicle driving tests: the slalom, double lane change, and step steer tests. Furthermore, we investigated the effects of suspension stiffness, suspension damping, and anti-roll bar torsional stiffness on the dynamic characteristics and responses of the vehicle model. This study presented a new full-car model that can analyze a turning vehicle’s behavior in response to changes in the steering angle input. The developed dynamic vehicle model may help vehicle designers predict the dynamic responses of a vehicle through simulation without performing a driving test.

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Vehicle roll stability analysis considering lateral-load transfer rate

Cited by 7 publications

References 1 publication

A rollover safety margin-based approach for quantifying the tractor-semitrailers’ emergency lane-changing response on expressway curves

A rollover safety margin-based approach for quantifying the tractor-semitrailers’ emergency lane-changing response on expressway curves

Dynamic Modeling and Analysis of a Driving Passenger Vehicle

Dynamic Modeling and Analysis of a Driving Passenger Vehicle

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