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Semi-active suspensions with adaptive capability

✍ Scribed by I. Youn; A. Hać

Book ID
102976419
Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
777 KB
Volume
180
Category
Article
ISSN
0022-460X

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✦ Synopsis

This paper deals with the synthesis of control laws for a 2-DOF model of a vehicle with a semi-active suspension. The suspension system consists of a continuously variable damper and a spring that can vary the suspension stiffness among three different levels. An optimal control law governing the variation of damping and stiffness is derived using optimal control theory. This control law minimizes a performance index that trades off measures of ride comfort, road-holding and suspension rattle space. The possibility of having preview information about the future road input is also accounted for in the formulation. Adaptation of control laws to various road and speed conditions is discussed. The system performance in both time and frequency domains is evaluated by numerical simulations. Variation of the suspension stiffness is found to be particularly beneficial in improving ride characteristics when preview information is available.

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