Stabilization “Master Gain” Knob; Displaying The Master Gain Onscreen; Oscillations; Additional Features - Eagle Tree Systems Guardian ET-GUARD Instruction Manual

Warning: Be careful while tuning the Overall Gain. Some airframes may oscillate very strongly at higher gains, possibly damaging themselves. To avoid Warning: Be careful while tuning the Overall Gain. Some airframes may oscillate very strongly
strong oscillations, increase the Overall Gain slowly and reduce it as soon as oscillations are noticed. strong oscillations, increase the Overall Gain slowly and reduce it as soon as oscillations are noticed.
Stabilization "Master Gain" Knob
When the OSD Pro's "Choose Menu Receiver Inputs" option is set to "3-Position" or "None", the OSD Pro's Aux2 input channel can be used as a Master Gain for the When the OSD Pro's "Choose Menu Receiver Inputs" option is set to "3
Guardian. This overrides the OSD Pro's menu option "Overall Gain" during normal flight (the "Overall Gain" setting is always used during RTH). This Master Gain Guardian. This overrides the OSD Pro's menu option "Overall Gain" during normal flight (the "Overall Gain" setting is always
multiplies the individual Pitch/Roll gains and serves as a way to easily tune both. If you have an RC controller that has an analog kno the individual Pitch/Roll gains and serves as a way to easily tune both. If you have an RC controller that has an analog kno the individual Pitch/Roll gains and serves as a way to easily tune both. If you have an RC controller that has an analog knob, this can be mapped to the Aux2
channel to allow for On-The-Fly stabilization gain adjustment. Fly stabilization gain adjustment.
This knob gives the ability to transition smoothly from stabilized flight to un ransition smoothly from stabilized flight to un-stabilized flight. Additionally, since your airspeed can change your airframe's flight
characteristics, it is often helpful to be able to tune the controller in flight. Increasing its value will turn on stabilization, increasing the Guardian's effect until a full characteristics, it is often helpful to be able to tune the controller in flight. Increasing its value will turn on st
fly-by-wire behavior is achieved.
When this feature is used, the stabilizer's control characteristics given the Master Gain Knob's position are as follows: When this feature is used, the stabilizer's control characteristics given the Master Gain Knob's position are as follows:
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-100%: Stabilization is OFF. You can fly normally.
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-100%-~0% (depending on Pitch/Roll gain values): Medium Stabilization. Your airframe is now inherently stable, but depending on your % (depending on Pitch/Roll gain values): Medium Stabilization. Your airframe is now inherently stable, but depending on your knob selection, may % (depending on Pitch/Roll gain values): Medium Stabilization. Your airframe is now inherently stable, but depending on your
still be rolled by strong stick movements or turbulence. still be rolled by strong stick movements or turbulence.
Note: The Max Stabilized Pitch/Roll angles specified in the "Configure Guardian Stabilizer" menu may be exceeded in this range, dep The Max Stabilized Pitch/Roll angles specified in the "Configure Guardian Stabilizer" menu may be exceeded in this range, depending on the Master Gain The Max Stabilized Pitch/Roll angles specified in the "Configure Guardian Stabilizer" menu may be exceeded in this range, dep
knob's position, flight behavior of your model and type of maneuvers attempted. knob's position, flight behavior of your model and type of maneuvers attempted. Do not attempt maneuvers that may destabilize your airplane!
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~0% - 100%: Maximum stabilization. The model should not roll over when in this range. Servo commands will become exaggerated, lea 100%: Maximum stabilization. The model should not roll over when in this range. Servo commands will become exaggerated, lea 100%: Maximum stabilization. The model should not roll over when in this range. Servo commands will become exaggerated, leading to tighter control of
the plane and true Fly-By-Wire functionality.
Note that if you don't have a knob available on your radio, you can also use the Note that if you don't have a knob available on your radio, you can also use the OSD Pro Aux 2 input as an "on/off" switch for stabilization. This is done by
connecting a spare switch channel to the Aux 2 input. Then, depending on the endpoints progra
stabilization levels and turn off stabilization by flipping the switch. stabilization levels and turn off stabilization by flipping the switch.
If no connection is made to the OSD Pro Aux 2 input, or you have not configured your OSD switch mode to "3
Gain" setting is always used. The "Stabilizer Overall Gain" setting is also always used during RTH. Gain" setting is always used. The "Stabilizer Overall Gain" setting is also always used during RTH.
Note: The described behavior assumes a standard deflection controller, with behavior assumes a standard deflection controller, with -100% being defined by a 1.1ms servo pulse and
Warning: When RTH is enabled, the Guardian Overall Gain from the "Configure Guardian Stabilizer" menu is used, even if the Aux2 input When RTH is enabled, the Guardian Overall Gain from the "Configure Guardian Stabilizer" menu is used, even if the Aux2 input is configured to When RTH is enabled, the Guardian Overall Gain from the "Configure Guardian Stabilizer" menu is used, even if the Aux2 input
provide the Overall Gain as well. If the menu value of Overall Gain in this menu is set too low, then RTH will not be stabilized. provide the Overall Gain as well. If the menu value of Overa

Displaying the Master Gain Onscreen

To display the Master Gain on all OSD Pages, turn on the "Servo Deflections Display" as described above. With the Servo Deflection Display line ena To display the Master Gain on all OSD Pages, turn on the "Servo Deflections Display" as described above. With the Servo Defl
parameter on that line represents the Overall Gain.

Oscillations

Sometimes, when the controller gains are set very high or if there is a very high airspeed, oscillations can develop. If osc Sometimes, when the controller gains are set very high or if there is a very high airspeed, oscillations can develop. If oscillations occur, turn down the Master Gain
knob, change the inputs of your master gain switch, or adjust the Overall Gain menu setting if a knob or switch is not being used, until the oscillations stop.

Additional Features

Center-Stick Only Stabilization

Some people looking for more aerobatic capabilities from their airplane prefer to disable the sta people looking for more aerobatic capabilities from their airplane prefer to disable the stabilizer until
they need it for crash avoidance or just to take a short break without needing to land. Center they need it for crash avoidance or just to take a short break without needing to land. Center-Stick Only
Stabilization allows for a quick return to stabilized flight at any time by letting go of the control stick. It can Stabilization allows for a quick return to stabilized flight at any time by letting go of the control stick. It can
be enabled in the "Configure Guardian Stabilizer" menu.
After turning on this feature, choose the size of the Center-Stick Box by adjusting
Size". Choosing "1" will size the box to 10% of your control stick movement range
while "10" will cover the entire physical range of your control stick physical range of your control stick (smoother turns). Moving the control
stick away from its centered position will decrease your Overall Gain until it reaches zero at the edge of the centered position will decrease your Overall Gain until it reaches zero at the edge of the
Center Stick Box as illustrated in Figure 1.
Moving the control stick outside the Center-Stick Box will accomplish the same as turning your Overall
Gain Knob to 0%. Bringing the stick back to center will bring the Overall Gain back to its original value, set . Bringing the stick back to center will bring the Overall Gain back to its original value, set
either by the "Stabilizer Overall Gain" parameter or by the Aux2 servo input as explained in the section either by the "Stabilizer Overall Gain" parameter or by the Aux2 servo input as explained in the section
"Stabilization "Master Gain" Knob."
IMPORTANT: Remember that when Center Stick stabilization is enabled,
control stick will reduce stabilization, including during takeoff or hand launch! After trimming, control stick will reduce stabilization, including during takeoff or hand
remember to execute the "Reset Cruise Sticks / Throtl" command

Heading Hold (Recommended)

Copyright © 2011 Eagle Tree Systems, LLC
. Then, depending on the endpoints programmed for your switch in your radio
Aux 2 input, or you have not configured your OSD switch mode to "3-position" or "None"
or adjust the Overall Gain menu setting if a knob or switch is not being used, until the oscillations stop. or adjust the Overall Gain menu setting if a knob or switch is not being used, until the oscillations stop.
Stick Box by adjusting the "Center Stick Box
box to 10% of your control stick movement range (best for 3D flight)
Stick Box will accomplish the same as turning your Overall
when Center Stick stabilization is enabled, moving or trimming your
Sticks / Throtl" command to ensure full stabilization.
stabilized flight. Additionally, since your airspeed can change your airframe's flight
abilization, increasing the Guardian's effect until a full
Aux 2 input as an "on/off" switch for stabilization. This is done by
then RTH will not be stabilized.
5
possibly damaging themselves. To avoid
channel can be used as a Master Gain for the
used during RTH). This Master Gain
that may destabilize your airplane!
in your radio, you can set the on and off
None", the on-screen "Stabilizer Overall
and +100% being a 1.9ms pulse.
ection Display line enabled, the "G"
illations occur, turn down the Master Gain
F
igure 1: Overall Gain vs. Stick Position : Overall Gain vs. Stick Position within
Center Stick Box
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