SERVOMOTOR SYSTEM FOR PROPORTIONAL-PLUS-INTEGRAL CONTROL Russian patent published in 1994 - IPC

FIELD: automatic control. SUBSTANCE: servomotor system for automatic proportional-plus-integral control has meter 1 of deviation of adjusted parameter which rod is coupled via coupling 2 to oscillation axis of bell crank 14. One arm of it is kinematically connected to rod of piston of hydraulic damper which cylinder 11 is anchored on stationary base. The other arm of bell crank 14 is kinematically linked to shut-off control valve 5. System also has servomotor which piston 9 is kinematically connected to adjusting element. Spaces above and beneath cylinder 8 are connected via control valve 5 to pump. Bell crank 14 is spring-loaded for angular movement with reference to its oscillation axis, for instance with the aid of screw cylindrical springs 15. Piston 12 and rod 13 of hydraulic damper are manufactured as light as it is possible. EFFECT: improved reliability of automatic control. 3 cl, 1 dwg