Résumé
A new control type for stick-slip micropositioning system is proposed in this paper : the voltage/frequency (U/f) proportional control. It gives more precise results relatively to the classical control algorithm. It is also an assembly of two classical controllers : the sign and the classical proportional controllers. A high stroke model of a stick-slip micropositioning system is first given. Then, we will theoretically analyse the performances of the closed loop process with the U/f controller. Finally, we will give some experimental results obtained with different values of the proportional gains.