The Experts below are selected from a list of 105 Experts worldwide ranked by ideXlab platform

Hans B Pacejka - One of the best experts on this subject based on the ideXlab platform.

  • Pragmatic tyre model for short wavelength side slip variations
    Vehicle System Dynamics, 1999
    Co-Authors: J.p. Maurice, M. Berzeri, Hans B Pacejka
    Abstract:

    The first-order relaxation length concept is often used to model transient tyre behaviour. It gives a rather good representation of the lateral force response, also at shorter wavelengths. The self aligning moment appears to behave rather differently and its responses cannot be represented by a relaxation length system only. Based on the analytical frequency response functions of the Pneumatic Trail of the brush type tyre model, a new pragmatic approach is developed. The model consists of a phase leading system in series with the first-order model for the lateral force. The results are compared to the responses of a discrete brush type simulation model. It appears that the aligning moment can be represented by this new pragmatic model very well.

  • Magic Formula Tyre Model with Transient Properties
    Vehicle System Dynamics, 1997
    Co-Authors: Hans B Pacejka, I. J. M. Besselink
    Abstract:

    The tyre force and moment generating properties connected with the vehicle's horizontal motions are considered. Knowledge of tyre properties is necessary to properly design vehicle components and advanced control systems. For this purpose, mathematical models of the tyre are being used in vehicle simulation models. The steady-state empirical 'Magic Formula tyre model' is discussed. The aligning torque description is based on the concepts of Pneumatic Trail and residual torque. This facilitates its combined slip description. Following Michelin, weighting functions have been introduced to model the combined slip force generation. A full set of equations of the steady-state part of the model of the new version 'Delft Tyre 97' is presented. The non-steady state behaviour of the tyre is of importance in rapid transient manoeuvres, when cornering on uneven roads and for the analysis of oscillatory braking and steering properties. A relatively simple model for longitudinal and lateral transient responses restricted to relatively low time and path frequencies is introduced.

  • Magic Formula Tyre Model with Transient Properties
    Vehicle System Dynamics, 1997
    Co-Authors: Hans B Pacejka, I. J. M. Besselink
    Abstract:

    ABSTRACT The tyre force and moment generating properties connected with the vehicle's horizontal motions are considered. Knowledge of tyre properties is necessary to properly design vehicle components and advanced control systems. For this purpose, mathematical models of the tyre are being used in vehicle simulation models. The steady-state empirical ‘Magic Formula tyre model’ is discussed. The aligning torque description is based on the concepts of Pneumatic Trail and residual torque. This facilitates its combined slip description. Following Michelin, weighting functions have been introduced to model the combined slip force generation. A full set of equations of the steady-state part of the model of the new version ‘Delft Tyre 97’ is presented. The non-steady state behaviour of the tyre is of importance in rapid transient maneuvres, when cornering on uneven roads and for the analysis of oscillatory braking and steering properties. A relatively simple model for longitudinal and lateral transient responses...

  • Friction Recognition Using the Tyre as Sensor
    IFAC Proceedings Volumes, 1996
    Co-Authors: W.r. Pasterkamp, Hans B Pacejka
    Abstract:

    Abstract Continuously updated knowledge of the friction potential and the friction demand can help to improve manoeuvrability and thereby safety of vehicles under slippery road conditions. An on line estimation method, based on recognition of the Pneumatic Trail, is presented using a simple brush type tyre model. The method is verified by outdoor experiments using a tyre test Trailer. Disturbances such as camber, residual forces and moments, combined slip of the tyre and dynamic behaviour of the tyre are considered. Neural networks have been used both for modelling and identification. Finally, a low-cost implementation of the system in the front wheel suspension of a passenger car is discussed.

Steven L Waslander - One of the best experts on this subject based on the ideXlab platform.

  • Pneumatic Trail based slip angle observer with dugoff tire model
    Intelligent Vehicles Symposium, 2014
    Co-Authors: Sirui Song, Michael Chi Kam Chun, Jan P Huissoon, Steven L Waslander
    Abstract:

    Autonomous driving requires reliable and accurate vehicle control at the limits of tire performance, which is only possible if accurate slip angle estimates are available. Recent methods have demonstrated the value of Pneumatic Trail for estimating slip angle in the non-linear region using the Fiala tire model. We present an improved slip angle estimation method based on the Pneumatic Trail method, which incorporates both lateral and longitudinal acceleration effects through the use of the Dugoff tire model. The proposed method offers significant improvements over existing methods, where longitudinal effects of the road-tire were assumed negligible. The results are demonstrated using CarSim, which relies on empirical data models for tire modelling and therefore presents a useful evaluation of the method.

  • Intelligent Vehicles Symposium - Pneumatic Trail based slip angle observer with Dugoff tire model
    2014 IEEE Intelligent Vehicles Symposium Proceedings, 2014
    Co-Authors: Sirui Song, Michael Chi Kam Chun, Jan P Huissoon, Steven L Waslander
    Abstract:

    Autonomous driving requires reliable and accurate vehicle control at the limits of tire performance, which is only possible if accurate slip angle estimates are available. Recent methods have demonstrated the value of Pneumatic Trail for estimating slip angle in the non-linear region using the Fiala tire model. We present an improved slip angle estimation method based on the Pneumatic Trail method, which incorporates both lateral and longitudinal acceleration effects through the use of the Dugoff tire model. The proposed method offers significant improvements over existing methods, where longitudinal effects of the road-tire were assumed negligible. The results are demonstrated using CarSim, which relies on empirical data models for tire modelling and therefore presents a useful evaluation of the method.

Seibum B Choi - One of the best experts on this subject based on the ideXlab platform.

  • early detection of tire road friction coefficient based on Pneumatic Trail stiffness
    Advances in Computing and Communications, 2016
    Co-Authors: Kyoungseok Han, Eunjae Lee, Seibum B Choi
    Abstract:

    This paper presents a method for estimating the maximum lateral tire-road friction coefficient and wheel side slip angle based on the Pneumatic Trail information that exhibits unique characteristics according to the road surface conditions. The high sensitivity of the Pneumatic Trail for the wheel side slip angle enables the proposed observer to detect the peak tire-road friction coefficient in low slip regions. The conventional method that is highly dependent on the tire model has drawbacks due to model uncertainty. In order to overcome these shortcomings, the proposed method minimizes the use of existing tire models. In addition, traction force is also considered in this paper using a correction factor. The estimation results are obtained recursively under the persistent excitation condition. A simulation is conducted first in order to verify the performance of the proposed method using a combination of the Carsim and Matlab & Simulink. Then, vehicle experiments are conducted on a proving ground in order to verify the feasibility of the proposed method. The verification results reveal that the early detection of the maximum tire-road friction coefficient is possible with less excitation signals than the conventional methods.

  • a study on lateral tire road friction coefficient estimation using tire Pneumatic Trail information
    Transactions of the Korean Society of Automotive Engineers, 2016
    Co-Authors: Kyoungseok Han, Seibum B Choi
    Abstract:

    The demands for vehicle safety systems such as ABS and ESC have been increased. Accurate vehicle state estimation is required to realized the abovementioned systems and tire-friction coefficient is crucial information. Estimation of lateral tire-road friction coefficient using Pneumatic Trail information is mainly dealt in this paper. Pneumatic Trail shows unique characteristics according to the wheel side slip angle and these property is highly sensitive to vehicle lateral motion. The proposed algorithm minimizes the use of conventional tire models such as magic formula, brushed tire model and Dugoff tire model. The pure side slip maneuver, which means no longitudinal dynamics, is assumed to achieve the ultimate goal of this paper. A simulation verification using Carsim and Simulink is performed and the results show the feasibility of the proposed algorithms.

  • ACC - Early detection of tire-road friction coefficient based on Pneumatic Trail stiffness
    2016 American Control Conference (ACC), 2016
    Co-Authors: Kyoungseok Han, Eunjae Lee, Seibum B Choi
    Abstract:

    This paper presents a method for estimating the maximum lateral tire-road friction coefficient and wheel side slip angle based on the Pneumatic Trail information that exhibits unique characteristics according to the road surface conditions. The high sensitivity of the Pneumatic Trail for the wheel side slip angle enables the proposed observer to detect the peak tire-road friction coefficient in low slip regions. The conventional method that is highly dependent on the tire model has drawbacks due to model uncertainty. In order to overcome these shortcomings, the proposed method minimizes the use of existing tire models. In addition, traction force is also considered in this paper using a correction factor. The estimation results are obtained recursively under the persistent excitation condition. A simulation is conducted first in order to verify the performance of the proposed method using a combination of the Carsim and Matlab & Simulink. Then, vehicle experiments are conducted on a proving ground in order to verify the feasibility of the proposed method. The verification results reveal that the early detection of the maximum tire-road friction coefficient is possible with less excitation signals than the conventional methods.

I. J. M. Besselink - One of the best experts on this subject based on the ideXlab platform.

  • Magic Formula Tyre Model with Transient Properties
    Vehicle System Dynamics, 1997
    Co-Authors: Hans B Pacejka, I. J. M. Besselink
    Abstract:

    The tyre force and moment generating properties connected with the vehicle's horizontal motions are considered. Knowledge of tyre properties is necessary to properly design vehicle components and advanced control systems. For this purpose, mathematical models of the tyre are being used in vehicle simulation models. The steady-state empirical 'Magic Formula tyre model' is discussed. The aligning torque description is based on the concepts of Pneumatic Trail and residual torque. This facilitates its combined slip description. Following Michelin, weighting functions have been introduced to model the combined slip force generation. A full set of equations of the steady-state part of the model of the new version 'Delft Tyre 97' is presented. The non-steady state behaviour of the tyre is of importance in rapid transient manoeuvres, when cornering on uneven roads and for the analysis of oscillatory braking and steering properties. A relatively simple model for longitudinal and lateral transient responses restricted to relatively low time and path frequencies is introduced.

  • Magic Formula Tyre Model with Transient Properties
    Vehicle System Dynamics, 1997
    Co-Authors: Hans B Pacejka, I. J. M. Besselink
    Abstract:

    ABSTRACT The tyre force and moment generating properties connected with the vehicle's horizontal motions are considered. Knowledge of tyre properties is necessary to properly design vehicle components and advanced control systems. For this purpose, mathematical models of the tyre are being used in vehicle simulation models. The steady-state empirical ‘Magic Formula tyre model’ is discussed. The aligning torque description is based on the concepts of Pneumatic Trail and residual torque. This facilitates its combined slip description. Following Michelin, weighting functions have been introduced to model the combined slip force generation. A full set of equations of the steady-state part of the model of the new version ‘Delft Tyre 97’ is presented. The non-steady state behaviour of the tyre is of importance in rapid transient maneuvres, when cornering on uneven roads and for the analysis of oscillatory braking and steering properties. A relatively simple model for longitudinal and lateral transient responses...

Sirui Song - One of the best experts on this subject based on the ideXlab platform.

  • Pneumatic Trail based slip angle observer with dugoff tire model
    Intelligent Vehicles Symposium, 2014
    Co-Authors: Sirui Song, Michael Chi Kam Chun, Jan P Huissoon, Steven L Waslander
    Abstract:

    Autonomous driving requires reliable and accurate vehicle control at the limits of tire performance, which is only possible if accurate slip angle estimates are available. Recent methods have demonstrated the value of Pneumatic Trail for estimating slip angle in the non-linear region using the Fiala tire model. We present an improved slip angle estimation method based on the Pneumatic Trail method, which incorporates both lateral and longitudinal acceleration effects through the use of the Dugoff tire model. The proposed method offers significant improvements over existing methods, where longitudinal effects of the road-tire were assumed negligible. The results are demonstrated using CarSim, which relies on empirical data models for tire modelling and therefore presents a useful evaluation of the method.

  • Intelligent Vehicles Symposium - Pneumatic Trail based slip angle observer with Dugoff tire model
    2014 IEEE Intelligent Vehicles Symposium Proceedings, 2014
    Co-Authors: Sirui Song, Michael Chi Kam Chun, Jan P Huissoon, Steven L Waslander
    Abstract:

    Autonomous driving requires reliable and accurate vehicle control at the limits of tire performance, which is only possible if accurate slip angle estimates are available. Recent methods have demonstrated the value of Pneumatic Trail for estimating slip angle in the non-linear region using the Fiala tire model. We present an improved slip angle estimation method based on the Pneumatic Trail method, which incorporates both lateral and longitudinal acceleration effects through the use of the Dugoff tire model. The proposed method offers significant improvements over existing methods, where longitudinal effects of the road-tire were assumed negligible. The results are demonstrated using CarSim, which relies on empirical data models for tire modelling and therefore presents a useful evaluation of the method.