METHOD OF LOCATION OF FAULTS IN ELECTROHYDRAULIC REGULATOR OF PROPELLER TURBINE Russian patent published in 1995 - IPC

FIELD: check of mismatch between actual magnitude of servomotor travel which turns blades of turbine-wheel and magnitude of control action. SUBSTANCE: main symptom of fault is first determined in form of deviation of magnitude of mismatch being checked towards excess over preset maximum permissible value. Then signal is furnished on location of fault. Simultaneously actual magnitude of speed and direction of travel of servomotor are determined which are used for determination of auxiliary symptoms of fault in form of mismatch of direction of servomotor travel and direction of control action in form of deviation of actual magnitude of speed beyond limits of preset values. Signal on location of fault is furnished in case of simultaneous presence of main fault and at least one of auxiliary symptoms. EFFECT: enhanced reliability. 1 dwg