The Extension Menu Overview - Simrad GC80 Dual MK2 User Manual

Simrad GC80/85 Dual MK2 Gyro Compass
7.3

The Extension menu overview

Main Sub
Category Category
Damping gain
1.1.U
Bearing servo gain
1.2.F
Horizontal servo gain
1.3.S
Leveling servo gain
A-1
1.4.u
(φ) Phi offset (°)
1.5.L
(θ) Theta offset (°)
1.6.t
X signal pickup gain (v/°)
1.7.G
988-12720-002
Parameter/description
Determines the damping (damping operation in
north-seeking motion = half cycle attenuation) and
represents a coefficient (ratio) to the standard value
stored in the software.
Determines the gain of the bearing servo loop where
phi Φ signal (deviation signal around rotor's vertical
axis) is calculated, drives the azimuth step motor and
has the Sensitive element follow to the Gyro-sphere
vertical axis (around azimuth axis) rotation. Presents a
coefficient (ratio) to the standard value stored in
software.
Determines the gain of the horizontal servo loop
where theta θ signal (rotor tilting angle signal) is
calculated, drives the horizontal DST and has the
Sensitive element follow to the Gyro-sphere tilting
angle (rotor tilting angle). Presents a coefficient
(ration) to the standard value stored in software.
Leveling motion (Sensitive element erection motion)
calculates X signal (equivalent inclination angle)
which is output from the Sensitive element and
relative inclination angle signal from HRZC board
controls to have the Sensitive element keep
horizontal. The value determines this control loop
gain. Presents a coefficient (ratio) to the standard
value stored in the software.
Offset value (°) around the vertical axis of Gyro-sphere
(rotor axis) and the Sensitive element.
Offset value (°) around the horizontal axis of
Gyro-sphere (rotor axis) and the Sensitive element.
Distance of the Sensitive element share and the rotor
axis direction. Inclination angle around horizontal axis
is obtained equivalently by monitoring this signal. For
example, when north side of the rotor axis rises, the
Sensitive element follows to rise its north side and
then Gyro-sphere suspended by the suspension wire
moves to south side. X signal represents this amount
Default
Range
value
1.00 0.00 - 2.00
1.00 0.00 - 2.00
1.00 0.00 - 2.00
1.00 0.00 - 2.00
0.00 -3.00 - 3.00
0.00 -3.00 - 3.00
2.32 0.00 - 5.00
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