Passenger Car Active Suspension System Model for Better Dynamic Characteristics

  • Mohd AveshEmail author
  • Rajeev Srivastava
Short Communication


The technological investigations to a light passenger car have been carried out in order to improve the comfort and safety features by the implementation of an active suspension system. A fuzzy logic control-based active suspension system is proposed for the fuel-efficient small passenger cars to fulfil the design upgradation requirements. The proposed design comprised of hydraulically powered actuators is installed at each of the car wheels between sprung and unsprung mass to compensate the ground forces in order to resolve the instability and comfort issues. The dynamic analysis figures out the significant improvement of 12% in comfort and 11.53% in the car stability.


Active suspension system Fuzzy logic controller Road vehicle Comfort–safety Car model 

vehicle body mass


mass moment of inertia in longitudinal and lateral directions, respectively

muf, mur

unsprung mass of front and rear wheel, respectively

Fss, Fsd

elastic and damping force of suspension system, respectively

Fts, Ftd

elastic and damping force of tires, respectively


sprung mass displacement

θ, ϕ

pitch angle and roll angle


unsprung mass displacement


road inputs to the wheel

a, b

distance of the suspension mass centre to the front and rear end, respectively

wf, wr

vehicle track at front and rear side, respectively



The authors are grateful to the Mechanical Engineering Department of Motilal Nehru National Institute of Technology Allahabad and highly acknowledge the supports extended in the fabrication of test set-up.


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Copyright information

© The National Academy of Sciences, India 2019

Authors and Affiliations

  1. 1.Mechanical Engineering DepartmentMotilal Nehru National Institute of Technology AllahabadAllahabadIndia

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