Abstract: Sensorised wheel hub unit and a method for detecting, in real time, forces and moments applied to an outer ring of the wheel hub unit in which piezoresistive ceramic plates are made of one piece with welded metal plates housed within respective recesses formed in an outer surface of the outer ring over respective races for rolling elements that there is a gap between the plates and a base wall of each recess; the temperature of the outer ring and the amplitude and frequency of first electrical signals (S1) associated with the sensors relating to the same race are analysed to determine a frequency value equal to the frequency of the first signal having the maximum amplitude and as many amplitude values (D1-Dn) as there are sensors associated with that race and each equal to the maximum amplitude of the first signal from each sensor, corrected according to temperature.

Abstract: A subsea electric actuator includes a housing configured to be filled with dielectric oil, an electric motor, a brake, a clutch, and a spring. The clutch and the brake are configured to maintain the spring in a compressed position. In certain embodiments, the actuator further includes a planetary gear and a multi-turn gear assembly, such that the planetary gear and the multi-turn gear assembly are configured to multiply the torque provided by the electric motor. The actuator can further include a ball screw and a nut screw configured to convert the torque provided by the motor into linear thrust to compress the spring.

Abstract: A subsea electric actuator includes a housing configured to be filled with dielectric oil, an electric motor, a brake, a clutch, and a spring. The clutch and the brake are configured to maintain the spring in a compressed position. In certain embodiments, the actuator further includes a planetary gear and a multi-turn gear assembly, such that the planetary gear and the multi-turn gear assembly are configured to multiply the torque provided by the electric motor. The actuator can further include a ball screw and a nut screw configured to convert the torque provided by the motor into linear thrust to compress the spring.