Rudder error detector

Details Rudder error detector Rudder error detector

1976-06-04

1977-10-25

Kunin, Stephen G.

Ships

Steering mechanism

Remote control steering excluding manual operation

244194, 318565, 318588, 340 30, B63H 2536

Patent

active

040551350

ABSTRACT:
Apparatus for detecting malfunctions in rudder-type steering systems utilizes electrical order and rudder angle signals. The rudder-order signal is applied to a closed-loop simulator that includes integrating apparatus adjusted to provide a time-variant simulated rudder angle signal which varies in the same manner that the actual rudder angle signal would vary in the absence of a malfunction when exposed to the same rudder error signal. The simulated and actual rudder angle signals are compared in a summing amplifier whose output is applied to a thresholding circuit which actuates an alarm whenever the instantaneous values of the simulated and actual rudder angle signals differ by more than a predetermined amount.

REFERENCES:
patent: 3145330 (1964-08-01), Hecht
patent: 3379951 (1968-04-01), Franchi et al.
patent: 3454851 (1969-07-01), Kirchhein
patent: 3571684 (1971-03-01), Bech

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