Position control system for e.g. rotatable gun - uses electromagnetic clutch with sensor to measure field strength for comparison with desired torque value

摘要

The system is used for positioning and attitude-stabilizing an inert mass e.g. a tank gun slewable on a movable base in at least one axis. It has oppositely rotatable driving parts supported on either the base or the mass, and the driven parts on the other of the base or mass are friction coupled to the driving parts under the control of one or more controllable electromagnetic clutches. The magnetic field strength in an airgap (3) between stator (1) and rotor (4) is measured by a plate (7) and compared with a desired torque value. The resultant signal is amplified and used to determine the current supplied to coils (2), thereby regulating the magnetic field.