Improving Ride Comfort of a Bus Using Fuzzy Logic Controlled Suspension

In this study an active controller is presented for vibration suppression of a full-bus model. The bus is modeled having seven degrees of freedom. Using the achieved model via Lagrange Equations the system equations of motion are derived. The suspensions of the bus model include air springs with two auxiliary chambers are used. Fuzzy logic controller is used to improve the ride comfort. The numerical results, verifies that the presented fuzzy logic controller improves the ride comfort.





References:
[1] N. Al-Holou, A. Bajwa and D. S. Joo, "Computer Controlled Individual Semi-Active Suspension System”, Circuits and Systems, Vol.1, 1993, pp 208 – 211.
[2] N. Yagiz, Y. Hacioglu, Y. Taskin, "Fuzzy Sliding-Mode Control of Active Suspensions”, Industrial Electronics, Vol. 55, 2008, pp 3883 – 3890.
[3] H. Bal, "Theoretical Investigation of the Performances of The Semi-active Suspension Systems with Air Springs and Comparison with Mechanical Suspensions”, M. Sc. Thesis, Gazi University Institute of Science and Technology, 2006.
[4] Z. Sihong, W. Jiasheng, Z. Ying, "Research on Theoretical Calculation Model for Dynamic Stiffness of Air Spring with Auxiliary Chamber”, Vehicle Power and Propulsion Conference, 2008, pp. 1 – 6.
[5] K. Toyofuku, C. Yamada, T. Kagawa, T. Fujita, "Study on Dynamic Characteristic Analysis of Air Spring with Auxiliary Chamber”, Journal of Sound and Vibration, Vol. 20, 1999, pp 349–355.
[6] G. Quaglia, M. Sorli, "Air Suspension Dimensionless Analysis and Design Procedure”, Vehicle System Dynamics, Vol. 35, No. 6, 2001, pp 443-475.
[7] N. Yagiz, L.E. Sakman, "Fuzzy Logic Control of A Full Vehicle without Suspension Gap Degeneration”, Int. J. Vehicle Design, 42, 2006, pp. 198–212.