Abstract: The present invention relates to a control method and control apparatus for controlling actuator apparatus implemented in active suspension apparatus for vehicles, in particular rail vehicles, said control method and said control apparatus being characterized in that they use the articulated architecture of the train to derive the local curvature of the track in real time, in which control method and control apparatus the control signal transmitted by said control apparatus to the actuator apparatus of the bogie of order n in the articulated train is a function of measurements of at least one deflection angle &agr;i at an articulation center situated between adjacent carriages and of the position offset hj of said articulation center relative to the track.

Abstract: The device comprises a variable frequency AC generator with means of exitation supplied by means for controlling exitation current, means for regulation of the frequency of the generator as a function of an index value, means for measuring actual speed of the mobile portion of the motor, and means for comparing actual speed with the index value. According to the invention, the means for controlling the exitation current are connected to the means for comparing actual speed with the index value, and the generator has a high internal reactance.

Abstract: A hydrodynamic test apparatus including a model support which comprises a submerged frame equipped with rollers and resting on the bottom of a tank is disclosed. A removable plate is attached to the top of the frame and a linear induction motor is attached to the side of the frame. The linear induction motor is supplied with current by conductor rails affixed to the bottom of the tank.

Abstract: The method makes possible experimentation on reduced scale models, more especially in non-stationary operating conditions, of the rotor of rotary electrical machines respecting the physical conditions which ensure in the rotor under test a simultaneous similitude for the electromagnetic, thermal and mechanical phenomena. The contradiction which appears in the reduction of the electromagnetic forces and of the inertial forces is removed by modifying the stator of the reduced scale model so as to produce in the rotor a correct evolution of the rotor frequencies. The method is useful for testing rotors of very high power electrical machines.

Abstract: A wheel structure such as a flywheel with hub and rim adapted for use at high angular velocities including a strong, compact and perfectly balanced coiling formed by a radiating winding of at least two cables linking the wheel hub to the wheel rim and enveloping the rim. Also the method of manufacturing of the wheel structure by winding of the cables between the wheel hub and wheel rim by cables continuously dispensed under constant tension looped around the wheel rim.

Abstract: A disc brake keyed on a shaft has two levers and two gripping pads and comprises at least one spring whose action produces the tightening of the two pads on the disc. An electromagnet with a fixed yoke and movable armature produces the releasing of the two pads. A pivot assembly for the two levers is provided each comprising one end acting on one of the two pads and an opposite actuated end. The electromagnet is arranged between the actuated end of one of the levers and the actuated end of the other of the levers. The actuated ends have the form of a hollow body enveloping the electromagnet at least in part. The total lateral bulk of the gripper, in the direction parallel to the shaft bearing the disc is thereby kept less than the sum of the thicknesses of the two levers and of the electromagnet, the electromagnet thus remaining accessible. The device is notably useful in handling equipment.