Fuzzy Control of a Quarter-Car Suspension System

An active suspension system has been proposed to improve the ride comfort. A quarter-car 2 degree-of-freedom (DOF) system is designed and constructed on the basis of the concept of a four-wheel independent suspension to simulate the actions of an active vehicle suspension system. The purpose of a suspension system is to support the vehicle body and increase ride comfort. The aim of the work described in the paper was to illustrate the application of fuzzy logic technique to the control of a continuously damping automotive suspension system. The ride comfort is improved by means of the reduction of the body acceleration caused by the car body when road disturbances from smooth road and real road roughness. The paper describes also the model and controller used in the study and discusses the vehicle response results obtained from a range of road input simulations. In the conclusion, a comparison of active suspension fuzzy control and Proportional Integration derivative (PID) control is shown using MATLAB simulations. Keywords—Fuzzy logic control, ride comfort, vehicle dynamics, active suspension system, quarter-car model.

[1]  P. G. Wright,et al.  The case for an irreversible active suspension system , 1989 .

[2]  Davor Hrovat,et al.  Optimum Vehicle Suspensions Minimizing RMS Rattlespace, Sprung-Mass Acceleration and Jerk , 1981 .

[3]  Robin S. Sharp,et al.  On the Performance Capabilities of Active Automobile Suspension Systems of Limited Bandwidth , 1987 .

[4]  Robert W. Newcomb,et al.  Linear multiport synthesis , 1966 .

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

[6]  Timothy Gordon,et al.  A Comparison of Adaptive LQG and Nonlinear Controllers for Vehicle Suspension Systems , 1991 .

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

[8]  H. Chen,et al.  Application of Constrained H∞ Control to Active Suspension Systems on Half-Car Models , 2005 .

[9]  A Aly Ayman,et al.  A Cross-Coupled Intelligent Fuzzy Controller of a 2-DOF Electrohydraulic Servo Systems , 2000 .

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

[11]  Theo Meller.  Self-Energizing Hydropneumatic Levelling Systems , 1978 .

[12]  Lotfi A. Zadeh,et al.  Fuzzy Sets , 1996, Inf. Control..

[13]  D. Hrovat.  A class of active LQG optimal actuators , 1982, Autom..

[14]  Rémy Kocik,et al.  Distributed control of a car suspension system , 2004 .

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

[16]  Arben Cela,et al.  Performance evaluation of the distributed implementation of a car suspension system , 2006 .

[17]  Richard J. Dorling.  Integrated control of road vehicle dynamics , 1996 .

[18]  Andrew G. Alleyne,et al.  Nonlinear adaptive control of active suspensions , 1995, IEEE Trans. Control. Syst. Technol..

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