Proportional Amplifier for Analog Steering Gears

For control of proportional-/solenoid valves of valve adjustment via three-phase DC motors or torque motors.

Analog steering controls avoid the disadvantages of conventional steering controls ("bang-bang" control) and the related high mechanical burden on the entire steering equipment as well as overswing of the rudder beyond the set value.

As the central component of the Anschutz NautoSteer program the proportional amplifier meets all demands made on such a system. It can be fitted to all current steering gears, As monitoring outputs Hydraulic Lock and Steering Failure are available.

Steering gear pumps with system separation can be operated individually of simultaneously. A proportional amplifier is needed for each pump.

Extension for dual steering gears with four main pumps is possible. In autopilot operation the economical operating characteristics of the proportional control becomes evident. Energy lost is reduced, thus reducing fuel costs.

Mode of Operation

The rated rudder value from the handwheel (FU), tiller (FU) or autopilot is compared with the actual rudder signal. The difference between the two gives the corresponding output signal which controls the oil flow of the pups via the proportional valves or the torque motors. The proportional setting range is automatically adjusted to the rudder setting speed (one/two pump operation).

The proportional amplifier functions as continuous regulator, that is with sinking deviation the hydraulic valves are open less- the rudder speed is lowered. The rudder is guided to the rated value without over swing.

In case of disturbance of the follow-up electronics, it is possible to change over to non-follow-up steering (redundance).

During service or emergency measures, the steering gear can be controlled directly at the amplifier in operating mode "LOCAL2" using the keys Port and Stb.