An original feedback control with a reversible electromechanical actuator used as an active isolation system for a seat suspension. Part I: Theoretical study

This paper provides an overview of a theoretical study of an active seat su spension. The principal objective of this study is to improve ride passenge r comfort by reducing transmitted seat acceleration. The seat is represente d by a non-linear two degree of freedom model. The system is linearized for small perturbations around the equilibrium. To control the dynamic of the seat suspension, an original feedback control command with a reversible ele ctromechanical actuator is achieved. The synthesis of the regulator is real ized on the linearized model of the seat suspension and the root locus meth od is employed. Stability and robustness characteristics have been studied. Numerical simulations in time and frequency domain show the interests of t he regulator and its capability to isolate seat passenger.