Device for controlling a cycloid propeller for watercraft

US4752258A · kind A · utility

Assignees

• Siemens Aktiengesellschaft · DE
• J.M. Voith GmbH · DE

Inventors

• Josef Hochleitner · Herzogenaurach, DE
• Harald Gross · Neuschönborn, DE

Key dates

• Filing date: Oct 9, 1986
• Grant date: Jun 21, 1988
• Expiry date: Oct 9, 2006

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B63H2001/105
• WIPO field: Transport
• WIPO sector: Mechanical engineering

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.