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Fuzzy Logic Control of Seat Vibrations of a Non-Linear Full Vehicle Model

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Abstract

In this paper, the dynamic behavior of a non-linear eight degrees of freedom vehicle model having active suspensions and a fuzzy logic (FL) controlled passenger seat is examined. The non-linearity occurs due to dry friction on the dampers. Three cases of control strategies are taken into account. In the first case, only the passenger seat is controlled. In the second case, only the vehicle body is controlled. In the third case, both the vehicle body and the passenger seat are fully controlled at the same time. The time responses of the non-linear vehicle model due to road disturbance and the frequency responses are obtained for each control strategy. At the end, the performances of these strategies are compared.

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Abbreviations

a, b:

distances of axle to the center of gravity of the vehicle body

c, d:

distances of unsprung masses to the center of gravity of the axles

e, f:

distances of passenger seat to the center of gravity of the vehicle body

c si :

ith damping coefficient of suspension

c s5 :

damping coefficient of passenger seat

f(V ri ):

ith dry friction force

k si :

ith spring constant of suspension

k s5 :

spring constant of passenger seat

k ti :

ith stiffness coefficient of tire

m i :

ith mass of axle

m 5 :

mass of the passenger

x i :

ith state variable

z i (t):

ith road excitation

I x 7 :

mass moment of inertia of the vehicle body for pitch motion

I x 8 :

mass moment of inertia of the vehicle body for roll motion

M :

mass of the vehicle body

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Authors and Affiliations

  1. Faculty of Mechanical Engineering, Yildiz Technical University, Besiktas, Istanbul, Turkey

    Rahmi Guclu

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  1. Rahmi Guclu
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Correspondence to Rahmi Guclu.

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Guclu, R. Fuzzy Logic Control of Seat Vibrations of a Non-Linear Full Vehicle Model. Nonlinear Dyn 40, 21–34 (2005). https://doi.org/10.1007/s11071-005-3815-7

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  • DOI: https://doi.org/10.1007/s11071-005-3815-7

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