Acceleration Response in Determining Vehicles Objective Driveability Assessment

Abstract:

Vehicle driveability defined as smoothness of a vehicle operation at the will of the driver under all driving conditions. Driveability evaluation is conducted by giving subjective rating based certain test standard procedures. A group of test evaluators performed driveability test and gave individual rating based on subjective feeling. After discussion, a final overall rating is generated with consensus from all evaluators. Human subjective rating can be inconsistent due to physical health condition and individual preferences.Vehicle's acceleration profile can be associated with second order response. Every acceleration profileshas specific damping factorandnatural frequency.A study is conducted to determine the possibility of using second order parameter to setup an objective driveability assessment. Test vehicles with different acceleration conditionsare evaluated to determine driveability subjective rating. Acceleration profile for each vehicles is analyzed to determine its damping factorand natural frequency. A relation of damping factorand natural frequency with subjective driveability rating is established. The established relation of driveability is essential in providing guideline for future ECU calibration and tuning.

• Periodical: Applied Mechanics and Materials (Volume 663)
• Pages: 121-126
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.663.121
• Online since: October 2014
• Authors: Isa Yassir Arafat Machmudi Isa*, Mohd Azman Zainul Abidin, S. Mansor
• Keywords: Longitudinal Acceleration, Objective Driveability Assessment, Second Order Response, Subjective Ratings

References

[1] Perusahaan Otomobil Nasional Sdn. Bhd., Vehicle drive ability evaluation test procedure, Shah Alam, (2009).

[2] Peter Schoeggl and Erich Ramschak, Vehicle drive ability assessment using neuralnetworks for development, calibration and quality tests, SAE world congress, Michigan, (2000).

DOI: 10.4271/2000-01-0702

[3] R.E. Doray and C.B. Holmes, Vehicle driveability–its characterization and measurement, International congress and exposition, SAE, (1999).

[4] Isa Yassir Arafat and Mohd Azman, Integration between vehicle behavior and subjective feeling into objective assessment. Proceedings of the International Conference of Mechanical Engineering and Research, Kuantan, Pahang, (2013).

[5] Helmut O. List and Peter Schoeggl, Objective evaluation of vehicle driveability, International congress and exposition, Michigan, (1998).

[6] P. Schoggl, H.M. Koegeler, K. Gschweitl, H. Kokal, P. Williams and K. Hulak, Automated EMS calibration using objective drive ability assessment and computer aided optimization methods, SAEworld congress, Michigan, (2002).

DOI: 10.4271/2002-01-0849

[7] R.E. Doray and C.B. Holmes, Vehicle drive ability – its characterization and measurement, Int. congress and exposition, SAE, (1999).

[8] Olivier Hayat, Michel Lebrun and Emmanuel Domingues, Powertrain driveability evaluation: Analysis and simplification of dynamics models, SAE world congress, Michigan, (2003).

DOI: 10.4271/2003-01-1328

[9] Hamid Reza Karimi, WitoldPawlus and Kjell G. Robbersmyr, A recursive model for nonlinear spring mass damper estimation of a vehicle localized impact, Grimstad, University of Agder.

[10] Jerzy Jantos, Sebastian Brol and JaroslawMamala, Problems in assessing road vehicle driveability parameters determined with the aid of accelerometer, World congress, Michigan, (2007).

DOI: 10.4271/2007-01-1473

[11] SAE, SAE cold start and driveability procedure, J1635, (1993).