CH 562 SURFACE SHIP STEERING SYSTEMS

Question 1

There are 3 types of surface steering control systems

Answer 1

hand (electric), hydraulic telemotor, and digital.

Question 2

This is used to control systems that are designed to operate the linkage-controlled servo valve on the main pump or the direct link to the swashplate.

Answer 2

Hand (electric)

Question 3

The helm wheel, sometimes called the steering wheel or trick wheel, is part of a

Answer 3

synchro transmitter assembly

Question 4

The wheel is mechanically
connected to the Helm Order Indicator pointer so the

Answer 4

helmsman can see the position of the wheel and the command
angle.

Question 5

These synchro transmitters send signals to

Answer 5

the synchro receivers in the steering gear room

Question 6

this is used for voltage imbalance to control the component that turns the input shaft of the differential.

Answer 6

The servo amplifier

Question 7

The helm order/rudder angle pointers are mounted with

Answer 7

concentric shafting

Question 8

The nonfollow-up controller (NFC) is a small control panel
used to steer the ship from the

Answer 8

bridge

Question 9

What kind of switch is the steering mode selector, that allows the helmsman to select the method of steering the ship.

Answer 9

rotary switch

Question 10

The faults are identified on the steering alarm indicators panel near the

Answer 10

helm at the ship control console.

Question 11

Electrical cables carry steering control signals between remote steering stations and

Answer 11

the steering gear room

Question 12

Duplicate cables are provided and are separated between the port and starboard sides of the ship to increase

Answer 12

the survivability of the system.

Question 13

The amplifiers convert the electrical signals from the helm synchro transmitter assembly into control signals that operate

Answer 13

the input shaft of the differentials

Question 14

Steering control amplifiers develop the signal that is used for controlling the

Answer 14

Rotary Hydraulic Power Unit (RHPU)

Question 15

The switchboard is used to transfer control between steering stations and to

Answer 15

secure remote control signals when operating with the
differential trick wheels

Question 16

The switchboard also functions as a distribution point for transmitting signals from the

Answer 16

bridge to each of the RCSUs

Question 17

The differential mechanism measures any difference between the helm angle and the rudder angle and strokes the pump swashplate to

Answer 17

eliminate the difference

Question 18

What kind of valve valve is within the RHPU controls the direction of motor rotation

Answer 18

4-way directional

Question 19

When the motor is positioned to obtain the correct rudder
angle, hydraulic fluid flow from the auxiliary pump is directed away from the directional valve through a

Answer 19

bypass valve

Question 20

The bypass valve is

Answer 20

solenoid operated

Question 21

What kind of motor does the Rotary Hydraulic Power Unit (RHPU) contain

Answer 21

low inertia fluid motor that rotates the input shaft of the differential

Question 22

What kind of valve is within the RHPU that controls the directon of the motor rotation

Answer 22

4-way directional valve

Question 23

What provides a stabilizing influence on the servo motor rotation

Answer 23

tachometer

Question 24

The primary function of servo motor systems is to

Answer 24

translate the electrical
signals from the remote steering stations into a mechanical rotation so that the steering commands can be input into the differential

Question 25

The helm wheels are manually operated and perform the function of the

Answer 25

RHPU or servo unit

Question 26

What equipment provides the automatic test capability to detect, localize, and isolate faults within the steering system.

Answer 26

Built-In-Test (BIT)

Question 27

The wheel is mechanically attached to potentiometers and a

Answer 27

synchro transmitter

Question 28

Critical faults include

Answer 28

a. Low hydraulic fluid level in the head tank
b. High hydraulic fluid temperature in the main pump case drain piping
c. Electric motor overload
d. Loss of ac power

Question 29

Major faults include:

Answer 29

a. Low hydraulic fluid level in the head tank
b. High fluid temperature in the supply tank
c. Low servo pressure
d. Servo control error
e. Low replenishment pressure
f. High motor temperature