FIELD: on-board and ground-based information - measuring systems used for operation and test of flying vehicles and their propulsion systems. SUBSTANCE: the device has signal transmitters 1 through 3, summation units 4,13,18 and 25, DC reference signal sources 5,14,30, from the first to seventh division units (6,15 through 17,19 through 21), the first (7), second (8) and third (9) subtract units, the second (11) and third (12) squarers, the first (22), second (23) and third (24) multiplier units, first comparison unit 29, first storage element 26, first delay unit 27 and first switch 28. EFFECT: enhanced accuracy of estimation of measured physical quantity due to operative monitoring of the mean power of measurement error signal and counteraction to failure by alteration of the device structure and its transfer to the storage condition. 1 dwg
