The Experts below are selected from a list of 18 Experts worldwide ranked by ideXlab platform

Hiromichi Nozaki - One of the best experts on this subject based on the ideXlab platform.

  • About the Change in the Amount of Perspiration and Steer Characteristic by Giving Visual Information and Body Sensory Information in the Drift Cornering
    SAE Technical Paper Series, 2005
    Co-Authors: Hiromichi Nozaki
    Abstract:

    The following has been understood for the change in the Steer Characteristic and the amount of perspiration in the drift cornering when not only visual information but also body sensory information is added. When body sensory information joins visual information as for the driver, it has been uuderstood that the amount of perspiration increases overall and can do the drift control continuing with a moderate tension. In the drive only of visual information, the driver comes to arrive easily at spin because the drift control is difficult. And, it has been understood that the amount of perspiration increases greatly compared with the case to give body sensory information, and becomes the one with a very high risk. Moreover, the driver can control an adequate drift compared with driving only visual information in feed back body sensory information on the roll angle to the Steer. Therefore, the importance of the perception of the state of the vehicle by giving the driver moderate body sensory information was able to be confirmed, and a preferable direction as the vehicle was clarified.

Kim Jungsik - One of the best experts on this subject based on the ideXlab platform.

  • objectification of subjective assessment on transient Steer Characteristic
    한국자동차공학회 Symposium, 2004
    Co-Authors: Gim Gwanghun, Kim Jungsik
    Abstract:

    Regarding on the evaluation of handling performance, subjective assessment is currently the only criteria to make the final judgement on the design of a vehicle system. The current vehicle dynamics concept employed to analyze objective tests or computer simulations with respect to the subjective assessment is based on a bicycle model. In using the existing vehicle dynamics for that purpose, it has been known to have two major problems: (1) The existing vehicle dynamics cannot realistically explain the subjective assessment at all. (2) The linear concept of the existing vehicle dynamics cannot practically represent the nonlinear behaviour of a complex vehicle system in reality. Since a new concept of vehicle dynamics regarding on transient Steer Characteristic presented here is based on subjective assessment, the concept can naturally explain the subjective assessment in terms of engineering language. This concept is also not limited to any linear assumption at all. Transient underSteer and overSteer are successfully formulated here. These formulations are successfully validated through four handling tests with numerous test sets. The correlation results show that there exists a very good correlation between subjective assessment and objective measurement.

Gim Gwanghun - One of the best experts on this subject based on the ideXlab platform.

  • objectification of subjective assessment on transient Steer Characteristic
    한국자동차공학회 Symposium, 2004
    Co-Authors: Gim Gwanghun, Kim Jungsik
    Abstract:

    Regarding on the evaluation of handling performance, subjective assessment is currently the only criteria to make the final judgement on the design of a vehicle system. The current vehicle dynamics concept employed to analyze objective tests or computer simulations with respect to the subjective assessment is based on a bicycle model. In using the existing vehicle dynamics for that purpose, it has been known to have two major problems: (1) The existing vehicle dynamics cannot realistically explain the subjective assessment at all. (2) The linear concept of the existing vehicle dynamics cannot practically represent the nonlinear behaviour of a complex vehicle system in reality. Since a new concept of vehicle dynamics regarding on transient Steer Characteristic presented here is based on subjective assessment, the concept can naturally explain the subjective assessment in terms of engineering language. This concept is also not limited to any linear assumption at all. Transient underSteer and overSteer are successfully formulated here. These formulations are successfully validated through four handling tests with numerous test sets. The correlation results show that there exists a very good correlation between subjective assessment and objective measurement.

Ni Jun - One of the best experts on this subject based on the ideXlab platform.

  • Research on Dynamics Steering Characteristics of a FSAE Racing Car on Bend Routes
    Vehicle & Power Technology, 2012
    Co-Authors: Ni Jun
    Abstract:

    According to the Characteristic of which a racing car often needs to decelerate into the corners and to accelerate out of them,and on the basis of a simplified 2-DOF model,the acceleration data in the competition are analyzed from the data logger of the vehicle information system.Taking consideration to the effect of the longitudinal axle load transfer on tire cornering stiffness,a transfer function of the car between yaw velocity and front wheel angle was obtained when running on the corners.The simulation results show that,under a step input,the car running into a curve possesses an under-Steer Characteristic but it presents an over-Steer feature when traveling out of a bent route.The effect of its wheelbase and moment of inertia on the car handling was studied respectively.The results indicate that the change of wheelbase has a greater influence on Steering Characteristics,and that the appropriate reduction in moment of inertia can greatly improve the response speed of the car in a bend.

Watkins S - One of the best experts on this subject based on the ideXlab platform.

  • Electronic differential for high-performance electric vehicles with independent driving motors
    Inderscience Enterprises Ltd. (United Kingdom), 2014
    Co-Authors: Fu C, Hoseinnezhad R, Bab-hadiashar A, Jazar R, Watkins S
    Abstract:

    This paper presents a novel electronic differential design for highperformance electric vehicles (EVs) with independent driving motors. The aim of this design is to achieve neutral-Steer in intense driving scenarios. The proposed method employs a closed-loop control system that constantly regulates the torque commands sent to the independent driving motors. These commands are generated to tune the torque difference between left and right driving motors at the amount that leads to neutral-Steer. Real vehicle parameters and real tyre testing data are employed in extensive simulations. Simulation results demonstrate that the new electronic differential works in principle and can endow the EV with a close-to-neutral Steer Characteristic, which is of great significance to high-performance vehicles in challenging driving conditions. Also, comparative simulations demonstrate how the proposed method can outperform competing methods in terms of Steering performance in various scenarios, while maintaining the dynamic stability of the vehicle