Abstract: The device for the dynamic measurement of the torque Ci of a polyphase self-synchronous motor comprises a sensor of the electrical angle between one of the phases and the axis perpedicular to the magnetic moment (APMM), circuits for the computation of the cosines of the angles (A, A-120.degree., A+120.degree.) between each phase and the APMM, sensors of current on each phase, and means to compute the torque Ci by application of the formula:Ci=k[i8.cos A+i2.cos (A+120.degree.)+i3.cos (A+120.degree.

Abstract: Active manual designation system combining the inertial stability of velocity loop systems with the use of the reflex movement of the operator for control purposes. It comprises a control member fixed to a support of the sight unit parallel to the aiming line and whose output signals are the nominal information values for the loops for regulating the rotation velocities about the azimuth and elevation axes. The operator holds the member in his right hand, places his right eye on the aiming line and keeps himself against the turret by means of a handle on which there is a correct sighting button.

Abstract: There is described a servo-control system incorporating a double-acting ram which is responsible for compensating electro-hydraulically for the imbalance in a servo-controlled load in order to achieve a high performance. To this end, a compensating loop is produced which slaves a balancing pressure P.sub.e to the variations in the imbalance. This pressure is exerted in one of the chambers of the ram, separately from the control pressure. It is governed by a pneumatic accumulator whose load is a function of the lack of balance between the pressure exerted by the imbalance and the balancing pressure.