Device for controlling a cycloid propeller for watercraft

Details Device for controlling a cycloid propeller for watercraft Device for controlling a cycloid propeller for watercraft

1986-10-09

1988-06-21

Basinger, Sherman D.

Marine propulsion

Paddle wheel

Having means to retract paddle or change paddle attitude

416108, B63H 2124

Patent

active

047522585

ABSTRACT:
To enable an exact and quick adjustment of the control point of a cycloid propeller ("Voith-Schneider-Propeller"), hydraulic adjustment cylinders are provided with electric proportional valves whose set value is determined by a cylinder stroke control circuit--preferably by way of an auxiliary valve current control circuit and a valve position control circuit. The travel and the rudder commands are transformed, by means of incremental transmitters which limit the adjustment velocity as a function of the load and the travel direction, according to suitable characteristics to control inputs which are transformed from ship coordinates to actuator coordinates and converted according to Pythagoras' theorem to set values for the cylinder strokes.

REFERENCES:
patent: 3700349 (1972-10-01), Fork
patent: 3704961 (1972-12-01), Fork et al.

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