Abstract
This paper describes a study of a semi-active vibration isolation system including dry-friction. A semi-active isolation system uses active dampers. The concept of 'active damper' gives rise to a control problem in that the control acts on some multiplicative parameters of the system. The main goal of this work is to find effective semi-active laws for a given performance index. The proposed procedure consists of selecting the semi-active law so that the active damper generates a given active force as long as it is dissipative. This active force is obtained from the study of performances of the associated fully active linear system under different assumptions on the feedbacks available. As an example, the suspension of a truck cab is presented.
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