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7-3-4 Wind gain
In GPS mode, The wind gain determines how much correction is applied to reduce any difference
between the set wind angle and the actual wind angle. A high setting will cause the AP380 to be
strongly affected by changes in the wind. A low setting will cause the AP380 to be very mildly
affected by changes in the wind.
8 Optimising steering performance
8-1 Steering parameters
The AP380 has seven steering parameters
which can be adjusted to optimize steering
performance. Select the Advanced checkbox to
view all parameters.
These parameters can be adjusted using the
Parameters menu. To adjust the parameters, go to
Menu > Setup > Profiles > Parameters (see section
6-2). From the Basic, AP380 or Compass screens,
press
to open the Parameters menu directly.
Adaptive
This is an adaptive response setting where the
AP380 adjusts how far the boat can move off
course to maintain a constant rate of rudder
corrections. The adaptive setting eliminates the
need to set the response according to varying
weather conditions.
•
The range is A1 (adapts slowly) to A5 (adapts
quickly).
Response (dead band)
How far the boat will be allowed to fall off
course before it makes a correction.
A lowest response setting lets the boat
fall very far off course before the AutoPilot
corrects. The highest response setting
corrects for every boat movement
•
The range is 1 (broad course keeping) to 10
(tight course keeping).
Ratio (gain)
How far the rudder moves relative to the
degrees of course error
•
The range is 1 (small corrections) to 10 (large
corrections).
Northstar Explorer AP380 System Installation and Operation Manual
Trim
Trim gain -(Integral gain) Watches if the boat
is off course consistently in one direction
(Ex. Due to a strong wind, or poor weight
distribution ).Trim Gain causes the AP380 to
slowly apply extra rudder in the opposite
direction to correct for the course error.
•
The range is 1 (trim slowly) to 10 (trim quickly)
and 0 (OFF no trim effect).
C-rudder
Counter rudder gain – (derivative gain) At the
end of the turn, counter rudder will steer in
the opposite direction to help stop the turn
at the desired heading. If the boat is turning
quickly towards the set course, the AP380
with start to apply rudder in the opposite
direction to prevent to boat steering past
the desired direction, this is called counter
rudder. Counter rudder gain sets how strong
this effect is.
•
The range is 1 (low: Most often used with a
plaining boat) to 10 (high : Most often used
with a sail boat or displacement boat) and 0
(OFF no counter rudder effect).
GPS gain
In GPS mode, this determines how much
correction is applied to remove cross track
error.
•
The range is 1 (steer gently back on track) to
10 (steer quickly back on track).
Wind gain
In wind mode, this determines how much
correction is applied to reduce any difference
between the set wind angle and the actual
wind angle.
•
The range is 1 (slowly affected by wind
change) to 10 (sensitive to wind change).
69
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