GRAUPNER 32032, Руководство по программированию

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181 Detail program description - Helicopter mixer
Once the motor has started, push the throttle
limiter s l o w l y in the direction of the opposite
end-point to put actuation of the throttle servo fully
under the control of the throttle/collective pitch
joystick once again. In order to prevent the throttle
servo from being restricted by the throttle limiter in
the full throttle direction, set control travel on the
plus-side of the column labeled "travel" to +125 %
in the "Tl16" line of the »
Control adjust « menu.
Leave the default value of "GL" in the "Type"
column alone, however, to confi gure this setting
globally for all fl ight phases.
For a more fi nely-tuned control travel curve for
the throttle limit control, you can also use the
"Expo throttle limiter" (page 100). This gives
you the option of defi ning the idle setting at the
throttle limit control's center position, as readily
determined both visually and audibly.
Set the throttle limiter to its center position and
adjust the "EXPO thro lim." value as far as is
needed until the motor is idling smoothly with
the throttle limit control set at its center point. In
this position, the motor will then start without any
problems. To switch off, turn or push the throttle
limit control – that is, without C1 cutoff trim – to its
rearmost end-point. As you do, ensure that the
affected servo cannot hit an end-stop mechanically.
The throttle restriction set by the throttle limiter is
made visible as a horizontal bar in the diagram:
Channel 1
Curve
off Point
Output
Input +50%
+50%
?
+ –
100
¼
O U
T P U
T
+50%
Throttle
Normal
The output signal for the throttle servo can never
be higher than that set by the horizontal bar. In
this example, about a maximum of +25 %.
Since electric drive systems have no need for an
•
idle setting, the basic confi guration of settings
for an electrically-powered helicopter merely
involves making sure that the control range of the
throttle limiter is both higher and lower than the
adjustment range of the speed controller (usually
-100 % to +100 %) by a safe margin. If necessary,
therefore, adjust the "travel" setting of the throttle
limiter as appropriate on the "Tl16" line of the
»
Control adjust « menu. Leave the default value
of "GL" in the "Type" column alone, however, to
confi gure this setting globally for all fl ight phases.
Fine-tuning of the throttle curve itself, however,
must take place in fl ight – as with a glow-powered
helicopter.
If you wish to record the fl ight time of a (glow-
•
powered) helicopter, you can assign a control
switch to the throttle limit slider, and then use this
to switch a timer on and off; see page 135.
For auto-rotation fl ight, an automatic switch-over
is made from this mixer to a confi gurable default
value; see page 190.
Helicopter with speed CONTROLLER
Unlike speed controllers , which merely adjust output
level in a manner similar to a carburetor, a speed
regulator keeps speed in the system it monitors
constant by regulating its output autonomously. In
the case of combustion motor powered helicopters,
the regulator therefore controls the throttle servo
itself as appropriate or, for an electric helicopter, the
motor's speed controller.
Therefore, speed regulators
do not need a traditional throttle curve but rather only
a speed setting.
A deviation from the preset speed
will therefore only take place if the level of output
required exceeds the maximum level available.
Usually, receiver output 8 is reserved for connecting a
speed
regulator ; refer to the receiver layout on page
65. However, if this connection is used there will be no
throttle limit function because the throttle limit function
can only be implemented via the "Channel 1
¼
Throttle" mixer which is on the – then unused – output 6.
To make the comfort and safety features of a throttle
limiter available, a speed regulator should be
connected to receiver output 6 (contrary to the general
connection notices) and only requires appropriate
adaptation to the throttle curve so it can take over the
task of the "conventional" transmitter control.
Since in this case the "throttle curve" only regulates
the target speed of the motor controller and this
target motor speed should typically remain constant
over the entire collective pitch adjustment range, the
"Channel 1
¼
Throttle" mixer must be used to set a
horizontal line – i.e. every (pitch) input value will result
in the same ("throttle") output value – whose "height"
is defi ned by the target motor speed.
First, therefore, the reference points "1" to "6" – if
present and set – are erased. Following this, the
reference points "L" (input = -100 %) and "H"
(input = +100 %) are then each set to the same
value, for example: