Commenced in January 2007
Frequency: Monthly
Edition: International
Paper Count: 31435
Controller Design for Active Suspension System of ¼ Car with Unknown Mass and Time-Delay

Authors: Ali Al-Zughaibi, Huw Davies


The purpose of this paper is to present a modeling and control of a quarter-car active suspension system with unknown mass, unknown time-delay and road disturbance. The objective of designing the controller is to derive a control law to achieve stability of the system and convergence that can considerably improve ride comfort and road disturbance handling. This is accomplished by using Routh-Hurwitz criterion based on defined parameters. Mathematical proof is given to show the ability of the designed controller to ensure the target of design, implementation with the active suspension system and enhancement dispersion oscillation of the system despite these problems. Simulations were also performed to control quarter car suspension, where the results obtained from these simulations verify the validity of the proposed design.

Keywords: Active suspension system, disturbance rejection, dynamic uncertainty, time-delay.

Digital Object Identifier (DOI):

Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 4956


[1] E. Esmailzadeh and H. D. Taghirad, “Active Vehicle Suspensions with Optimal State-Feedback Control,” J. Mech. Sci., no. March 1997, 1996.
[2] M. Yamashita, K. Fujimori, K. Hayakawa, and H. Kimura, “Application of H∞ Control to Active Suspension Systems,” Automatica, vol. 30, no. 11, pp. 1717–1729, 1994.
[3] C. Kim and P. I. Ro, “A Sliding Mode Controller for Vehicle Active Suspension Systems with Non-Linearities,” Proc. Inst. Mech. Eng. Part D J. Automob. Eng., vol. 212, no. 2, pp. 79–92, 2005.
[4] J. Watton, K. M. Holford, and P. Surawattanawan, “The Application of a Programmable Servo Controller to State Control of an Electrohydraulic Active Suspension”, vol. 218, pp. 1367–1377, 2004.
[5] G. Tang and F. Wang, “Suboptimal Control for Linear Large-Scale Systems with Small Time-Delay,” Control Theory Appl., vol. 20, pp. 121–124, 2003.
[6] D. Yue, Q.-L. Han, and J. Lam, “Network-Based Robust Control of Systems with Uncertainty,” Automatica, vol. 41, no. 6, pp. 999–1007, 2005.
[7] N. S. Nise, Control Systems Engineering. 2010.
[8] E. Akbari and M. Farsadi, “Observer Design for Active Suspension System Using Sliding Mode Control”, (SCOReD), 2010 IEEE, no. SCOReD, pp. 13–14, 2010.