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Design of active suspension and electronic stability program for rollover prevention

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Abstract

This paper presents a method for the design of a controller for rollover prevention using active suspension and an electronic stability program (ESP). Active suspension is designed with linear quadratic static output feedback control methodology to attenuate the effect of lateral acceleration on the roll angle and suspension stroke via control of the suspension stroke and tire deflection of the vehicle. However, this approach has a drawback in the loss of maneuverability because the active suspension for rollover prevention produces in vehicles an extreme over-steer characteristic. To overcome this drawback of the active suspension based method, ESP is designed. Through simulations, the proposed method is shown to be effective in preventing rollover.

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Abbreviations

a y :

lateral acceleration

g :

gravitational acceleration constant

m :

vehicle total mass

m s :

sprung mass

m u :

unsprung mass

I x :

roll moment of inertia about roll axis

I z :

yaw moment of inertia about yaw axis

k s :

stiffness of a suspension spring

k t :

stiffness of a tire

b s :

damping coefficient of a suspension damper

h :

height of C.G. from ground

h s :

height of C.G. from a roll center

C f :

cornering stiffness of a front tire

C r :

cornering stiffness of a rear tire

t f :

front track width

l f :

distance from C.G. to a front axle

l r :

distance from C.G. to a rear axle

r :

radius of a wheel

K B :

pressure-force constant

ν x :

longitudinal velocity of a vehicle

K g :

gain of sliding mode controller

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Authors and Affiliations

  1. BK21 School for Creative Engineering Design of Next Generation Mechanical and Aerospace Systems, Seoul National University, Seoul, 151-742, Korea

    S. Yim

  2. Department of Mechanical Engineering, KAIST, Daejeon, 305-701, Korea

    Y. Park

  3. School of Mechanical and Aerospace Engineering, Seoul National University, Seoul, 151-742, Korea

    K. Yi

Authors
  1. S. Yim
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  2. Y. Park
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  3. K. Yi
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Correspondence to S. Yim.

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Yim, S., Park, Y. & Yi, K. Design of active suspension and electronic stability program for rollover prevention. Int.J Automot. Technol. 11, 147–153 (2010). https://doi.org/10.1007/s12239-010-0020-6

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  • DOI: https://doi.org/10.1007/s12239-010-0020-6

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