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8 results on '"Choi, Seibum Ben"'

6. String tyre model for evaluating steering agility performance using tyre cornering force and lateral static characteristics.

Author

Lee, Eunjae, Lee, Jonghyup, and Choi, Seibum Ben

Subjects
TIRE design, AUTOMOBILE steering gear, MOTION, MATHEMATICAL models, TASK performance
Abstract

The cornering force and lateral static characteristics of a tyre are fundamental factors that describe the steering feel for handling performance. However, it is difficult to justify the contribution of each factor when the tyre’s cornering motion is evaluated through subjective assessment. Currently, the relaxation length of Pacejka’s tyre model is close to describing these tyre motions. Therefore, this paper proposes a string tyre model based on the relaxation length in order to represent the steering performance. The proposed method provides a more accurate modelling of the steering agility performance. Therefore, it is possible to use this model to predict the steering response performance, and this is validated through comparison with a real relaxation length. [ABSTRACT FROM AUTHOR]

Published
2017
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7. Model-based prediction of steering response

Author

Lee, Eun Jae, Lee, Jong Hyup, Choi, Seibum Ben, and Gil, Gibin

Abstract

To predict steering response, this paper proposes a string tire model based on relaxation length and a vehicle model designed by using effective cornering force. The cornering force, lateral static, and distortion characteristics of a tire are significant factors that describe steering response. Nevertheless, it is difficult to define the contribution of each factor when a tire’s cornering motion is evaluated through subjective assessment. A new concept of tire model, which adopts distortion stiffness (KD), is defined. A modified vehicle dynamics model is adapted to represent tire force lag and converted cornering stiffness (Cα) based on effective cornering force. This integration scheme is proposed to provide a more accurate modeling for steering response performance. The integration model is confirmed by dynamic response and validated through comparison with a steering response assessment by a subjective test engineer. The test results demonstrate the ability of this approach to predict steering response.

Published
2018
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8. The design of a control coupled observer for the longitudinal control of autonomous vehicles

Author

Choi, Seibum Ben

Subjects
Motor vehicles -- Technology application, Automatic guided vehicles -- Research, Control systems -- Research, Engineering and manufacturing industries, Science and technology
Abstract

This paper presents a distance observer that was developed for the longitudinal control of autonomous vehicles. The observer is implemented on a platoon of test vehicles as part of the California PATH research program. The experimental results show that the observer filters out the sensing error very effectively without any noticeable phase lag.

Published
1998

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