Class 2 (2nd Engineer) MEKG 📅 Jan 2023

Exam Question

With reference to electro-hydraulic steering gears:

(a) Explain in terms of control parlance, the function of the "Hunting gear"

(b) Explain the consequences if the standby pumping unit is motored

Reference Answer

### (a) Function of the "Hunting Gear" in Control Parlance
The hunting gear is the primary mechanical feedback mechanism in an electro-hydraulic steering gear system. In control systems terminology, it functions as a proportional controller within a closed-loop negative feedback system. Its purpose is to ensure the rudder angle (Process Variable) accurately matches the desired angle from the helm (Setpoint) and maintains it against external disturbances.
Its function can be broken down into the following control elements:
* **System Type:** Closed-Loop Negative Feedback Control System.

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