A method that allows one to control chaotic and hyperchaotic systems by a r
andom proportional pulse feedback of system variables is proposed. This met
hod is illustrated with the Rossler chaotic and the complex Lorenz-Harken h
yperchaotic systems, and a better control result is obtained. The advantage
of this method is that just one perturbed system variable is enough to obt
ain a stabilized periodic orbit.