When aiming to maximize productivity in rolling plants, the bottleneck is usually represented by a self-excited vibration of the machinery, known in the literature as chatter, which occurs at high strip velocities; The objective of this thesis is the development of a closed-loop control system which is going to damp and bound the chatter vibrations, with the final goal to increase the productivity of a tandem of five 6-high cold rolling mills property of the Danieli corporation, which also issued this project. The idea is that of using an injection system coming from vehicle application to control the pressure inside the hydraulic pistons which controls the gauge dimension, introducing a damping effect.