Steering failure alarm

Details Steering failure alarm Steering failure alarm

1980-08-11

1982-08-03

Blix, Trygve M.

Ships

Steering mechanism

Remote control steering excluding manual operation

244194, 318588, 340 30, 73178R, B63H 2536

Patent

active

043422748

ABSTRACT:
An apparatus for providing the operator of a marine vessel with an alarm when when a malfunction occurs in the steering system of the vessel. The apparatus utilizes a closed loop simulator to simulate the rudder position, and a comparison of the simulated rudder position to the actual rudder activates the alarm when a predetermined threshold value has been exceeded. Appropriate time delays during which the alarm is disabled make the apparatus adaptable for use with steering systems having a steering gear which has rate inconstancy, and a shaping circuit makes the apparatus adaptable for use with steering systems having a steering gear which has static positional nonlinearity.

REFERENCES:
patent: 3390614 (1968-07-01), Tatum
patent: 3493836 (1970-02-01), Nelson
patent: 3624479 (1971-11-01), Callas
patent: 3696282 (1972-10-01), Hirokawa et al.
patent: 3950687 (1976-04-01), Watson, Jr.
patent: 3993138 (1976-11-01), Stevens et al.
patent: 4032094 (1977-06-01), Morgan et al.
patent: 4055135 (1977-10-01), Wesner
patent: 4223624 (1980-09-01), Iyeta
patent: 4272711 (1981-06-01), Fukuyama
patent: 4281811 (1981-08-01), Nixon

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