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Howto:Implement a Fly-By-Wire System for Airliners: Difference between revisions
Howto:Implement a Fly-By-Wire System for Airliners (view source)
Revision as of 09:46, 8 February 2012
, 8 February 2012no edit summary
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* Automatically holds the current aircraft pitch and roll degree when stick is brought back to the center! < NEW! | * Automatically holds the current aircraft pitch and roll degree when stick is brought back to the center! < NEW! | ||
* ALPHA PROTECTION doesn't allow the plane to pitch up higher than 20 degrees < NEW! | |||
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me.update_elevator(); | me.update_elevator(); | ||
## ALPHA PROTECTION | |||
if (pitch > 20) { | |||
setprop("/controls/fbw/alpha-protect", 1); | |||
setprop("/controls/fbw/alpha-limit", 22); | |||
} elsif (pitch < -20) { | |||
setprop("/controls/fbw/alpha-protect", 1); | |||
setprop("/controls/fbw/alpha-limit", -22); | |||
} else setprop("/controls/fbw/alpha-protect", 0); | |||
## AUTO-STABILIZATION | ## AUTO-STABILIZATION | ||
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<u_max>1.0</u_max> <!-- maximum output clamp --> | <u_max>1.0</u_max> <!-- maximum output clamp --> | ||
</config> | </config> | ||
</pid-controller> | |||
<!-- =============================================================== --> | |||
<!-- Alpha Protection --> | |||
<!-- =============================================================== --> | |||
<pid-controller> | |||
<name>Alpha Protection</name> | |||
<debug>false</debug> | |||
<enable> | |||
<prop>/controls/fbw/alpha-protect</prop> | |||
</enable> | |||
<input> | |||
<prop>/orientation/pitch-deg</prop> | |||
</input> | |||
<reference> | |||
<prop>/controls/fbw/alpha-limit</prop> | |||
</reference> | |||
<output> | |||
<prop>/controls/flight/elevator-trim</prop> | |||
</output> | |||
<config> | |||
<Kp>-0.05</Kp> <!-- proportional gain --> | |||
<beta>1.0</beta> <!-- input value weighing factor --> | |||
<alpha>0.1</alpha> <!-- low pass filter weighing factor --> | |||
<gamma>0.0</gamma> <!-- input value weighing factor for --> | |||
<!-- unfiltered derivative error --> | |||
<Ti>1.0</Ti> <!-- integrator time --> | |||
<Td>0.00001</Td> <!-- derivator time --> | |||
<u_min>-1.0</u_min> <!-- minimum output clamp --> | |||
<u_max>1.0</u_max> <!-- maximum output clamp --> | |||
</config> | |||
</pid-controller> | </pid-controller> | ||