Effect of tire damping on the ride performance potential of active suspension systems

In this paper, constraints on the transfer functions from the road disturbance to the vertical acceleration, the suspension travel, and the tire deflection are derived for a quarter-car active suspension system using the vertical acceleration and/or the suspension travel measurements for feedback. The derived constraints complement the similar constraints in the literature. By using the factorization approach to feedback stability, it is shown that tire damping couples the motions of the sprung and unsprung masses; and eliminates a constraint at the wheelhop frequency. The influence of tire damping on the design of an active suspension system for a quarter-car model by a mixture of the LQG methodology and the interpolation approach is illustrated.

[1]  A. G. Thompson.  THE EFFECT OF TYRE DAMPING ON THE PERFORMANCE OF VIBRATION ABSORBERS IN AN ACTIVE SUSPENSION , 1989 .

[2]  Dean Karnopp,et al.  Theoretical Limitations in Active Vehicle Suspensions , 1986 .

[3]  Kisaburo Hayakawa,et al.  Application of H∞ control to active suspension systems , 1994, Autom..

[4]  Byoung Sam Kim,et al.  A study on radial directional natural frequency and damping ratio in a vehicle tire , 2007 .

[5]  Joel A. Levitt,et al.  The Influence of Tire Damping in Quarter Car Active Suspension Models , 1991 .

[6]  G. W. Walker,et al.  Performance Limitations and Constraints for Active and Passive Suspensions: a Mechanical Multi-port Approach , 2000 .

[7]  Semiha Turkay,et al.  A study of random vibration characteristics of the quarter-car model , 2005 .

[8]  Malcolm C. Smith.  ACHIEVABLE DYNAMIC RESPONSE FOR AUTOMOTIVE ACTIVE SUSPENSIONS. , 1995 .

[9]  M. Vidyasagar.  Control System Synthesis : A Factorization Approach , 1988 .

[10]  D. Hrovat,et al.  Survey of Advanced Suspension Developments and Related Optimal Control Applications, , 1997, Autom..

[11]  Tetsuro Butsuen,et al.  Invariant Properties of Automotive Suspensions , 1990 .

[12]  J. K. Hedrick,et al.  Alternative Control Laws for Automotive Active Suspensions , 1989 .

[13]  Dean Karnopp,et al.  Active and semi-active vibration isolation , 1995 .

[14]  A. G. Thompson.  Design of Active Suspensions , 1970 .

[15]  D. Hrovat,et al.  Optimal Active Suspension Design Using Constrained Optimization , 1997 .