Improvement of Ride Comfort of Turning Electric Vehicle Using Optimal Speed Control

Authors: Yingyi Zhou, Tohru Kawabe

Abstract:

With the spread of EVs (electric Vehicles), the ride comfort has been gaining a lot of attention. The influence of the lateral acceleration is important for the improvement of ride comfort of EVs as well as the longitudinal acceleration, especially upon turning of the vehicle. Therefore, this paper proposes a practical optimal speed control method to greatly improve the ride comfort in the vehicle turning situation. For consturcting this method, effective criteria that can appropriately evaluate deterioration of ride comfort is derived. The method can reduce the influence of both the longitudinal and the lateral speed changes for providing a confortable ride. From several simulation results, we can see the fact that the method can prevent aggravation of the ride comfort by suppressing the influence of longitudinal speed change in the turning situation. Hence, the effectiveness of the method is recognized.

Keywords: Electric vehicle, speed control, ride comfort, optimal control theory, driving support system.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1340583

References:

[1] S. Brown, D. Pyke and P. Steenhof, “Electric vehicles: The role and importance of standards in an emerging market”, Energy Policy, vol. 38, 2010, pp, 3797-3806.
[2] H. Mousazadeh, A. Keyhani, H. Mobli, U. Bardi, G. Lombardi and T. Asmar, “Environmental assessment of RAMseS multipurpose electric vehicle compared to a conventional combustion engine vehicle”, Journal of Cleaner Production, vol. 17, no. 9, 2009, pp. 781–790.
[3] T. Hirota, M. Ueda and T. Futami, “Activities of Electric Vehicles and Prospect for Future Mobility”, Journal of The Society of Instrument and Control Engineering , vol. 50, 2011, pp. 165-170.
[4] H. Tseng, J.S. Wu and X. Liu, “Affordability of Electric Vehicle for a Sustainable Transport System: An Economic and Environmental Analysis”, Energy Policy, vol. 61, 2013, pp.441-447.
[5] Y. Akatsu, “ An Evaluation Method of Improving Ride Comfort”, The Journal of Society of Automotive Engineers of Japan, vol. 52, no. 3, 1998, pp.47-52.
[6] C. Cucuz, “Evaluation of ride comfort”, International Journal of Vehicle Design, vol. 52, no. 3, 1994, pp. 318-325.
[7] N. Itagaki, T. Kinoshita and T. Fukao, “Semi-Active Suspension Control for Suppressing the Unsprung Mass Vibration and Improving the Ride Comfort”, The Journal of Society of Automotive Engineers of Japan, vol. 67, no. 7, 2013, pp.29-34.
[8] C. Nakagawa, “Think about the ride comfort of the rapid transit railway”, Railway Research Review, vol. 5, 2010, pp. 19-21.
[9] F. Wang, K. Sagawa and H. Inooka, “A study of the relationship between the longitudinal acceleration/deceleration of automobiles and ride comfort”, Ergonomics (Japan Ergonomics Society Journal), vol. 36, no. 4, 2000, pp. 191-200.
[10] F. Wang, K. Sagawa, T. Ishihara and H. Inooka, “An Automobile Driver Assistance System for Improving Passenger Ride Comfort”, The transactions of the Institute of Electrical Engineers of Japan, vol. D-122, no. 7, 2002, pp. 730-735.
[11] T. Ohtsuka, Introduction to nonlinear optimal control, Corona Publishing Co.Ltd, 2011.
[12] Y. Yamagishi, H. Inooka and F. Wang, “A study of ride comfort during the turning of a car”, Ergonomics (Japan Ergonomics Society Journal), vol. 39, no. 4, 2003, pp. 162-168.
[13] T. Nakamura and Y. Hori, “Motion control of electric vehicles taking derivative of yaw rate into account”, Reprint of IEEJ technical meeting on industrial instrumentation and control, vol. IIC-06, no. 3, 2006, pp. 11-16.
[14] H. Fuse, T. Kawabe and M. Kawamoto, “ Speed Control Method of Electric Vehicle for Improving Passenger Ride Quality”, International Journal of Intelligent Control and Automation (ISSN: 2153-0653), vol. 8, no.1, 2017, pp.29-43.