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Howto:Implement a Fly-By-Wire System for Airliners: Difference between revisions
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Howto:Implement a Fly-By-Wire System for Airliners (view source)
Revision as of 18:15, 11 February 2012
, 11 February 2012→/Nasal/fbw.nas: use a separate update_ailerons() method
m (→/Nasal/fbw.nas) |
m (→/Nasal/fbw.nas: use a separate update_ailerons() method) |
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| Line 139: | Line 139: | ||
var pitch = getprop("/orientation/pitch-deg"); | var pitch = getprop("/orientation/pitch-deg"); | ||
me.roll = getprop("/orientation/roll-deg"); | |||
var airspeedkt = getprop("/velocities/airspeed-kt"); | var airspeedkt = getprop("/velocities/airspeed-kt"); | ||
| Line 148: | Line 148: | ||
var ailtrim = getprop("/controls/flight/aileron-trim"); | var ailtrim = getprop("/controls/flight/aileron-trim"); | ||
me.aileronin = getprop(fcs~"aileron-cmd-norm"); | |||
me.elevatorin = getprop(fcs~"elevator-cmd-norm"); | me.elevatorin = getprop(fcs~"elevator-cmd-norm"); | ||
me.rudderin = getprop(fcs~"rudder-cmd-norm"); | me.rudderin = getprop(fcs~"rudder-cmd-norm"); | ||
| Line 154: | Line 154: | ||
## FBW Output (actual surface positions) | ## FBW Output (actual surface positions) | ||
me.aileronout = getprop(fcs~"aileron-fbw-output"); | |||
me.elevatorout = getprop(fcs~"elevator-fbw-output"); | me.elevatorout = getprop(fcs~"elevator-fbw-output"); | ||
me.rudderout = getprop(fcs~"rudder-fbw-output"); | me.rudderout = getprop(fcs~"rudder-fbw-output"); | ||
| Line 187: | Line 187: | ||
me.disconnectannounce = 0; | me.disconnectannounce = 0; | ||
me.update_ailerons(); | |||
me.update_elevator(); | me.update_elevator(); | ||
| Line 246: | Line 215: | ||
if (me.stabilize == 0) { | if (me.stabilize == 0) { | ||
setprop("/controls/fbw/stabpitch-deg", pitch); | setprop("/controls/fbw/stabpitch-deg", pitch); | ||
setprop("/controls/fbw/stabroll-deg", roll); | setprop("/controls/fbw/stabroll-deg", me.roll); | ||
me.stabilize = 1; | me.stabilize = 1; | ||
} | } | ||
| Line 272: | Line 241: | ||
### Adjust throttle while turning | ### Adjust throttle while turning | ||
if ((roll <= -5) or (roll >= 5)) { | if ((me.roll <= -5) or (me.roll >= 5)) { | ||
if (me.turnthrottlefix == 0) { | if (me.turnthrottlefix == 0) { | ||
| Line 279: | Line 248: | ||
} | } | ||
me.targetthrottle = me.throttleinit + (me.throttleinit * math.sin(math.abs(roll * DEG2RAD)))/2; | me.targetthrottle = me.throttleinit + (me.throttleinit * math.sin(math.abs(me.roll * DEG2RAD)))/2; | ||
if (me.targetthrottle > throttles[0]) { | if (me.targetthrottle > throttles[0]) { | ||
| Line 291: | Line 260: | ||
} | } | ||
if ( in_range(roll,[-5,5]) and (me.turnthrottlefix == 1) ) { | if ( in_range(me.roll,[-5,5]) and (me.turnthrottlefix == 1) ) { | ||
| Line 345: | Line 314: | ||
if (getprop("/controls/fbw/rudder")) { | if (getprop("/controls/fbw/rudder")) { | ||
if ((roll < -5) or (roll > 5)) { | if ((me.roll < -5) or (me.roll > 5)) { | ||
me.targetrudder = aileronout / 2; | me.targetrudder = me.aileronout / 2; | ||
if (me.targetrudder < me.rudderout) me.rudderout -= 0.015; | if (me.targetrudder < me.rudderout) me.rudderout -= 0.015; | ||
| Line 357: | Line 326: | ||
# Transmit output signals to surfaces | # Transmit output signals to surfaces | ||
setprop(fcs~"aileron-fbw-output", aileronout); | setprop(fcs~"aileron-fbw-output", me.aileronout); | ||
setprop(fcs~"elevator-fbw-output", me.elevatorout); | setprop(fcs~"elevator-fbw-output", me.elevatorout); | ||
setprop(fcs~"rudder-fbw-output", me.rudderout); | setprop(fcs~"rudder-fbw-output", me.rudderout); | ||
| Line 370: | Line 339: | ||
# Transmit input signals directly to surfaces | # Transmit input signals directly to surfaces | ||
setprop(fcs~"aileron-fbw-output", aileronin); | setprop(fcs~"aileron-fbw-output", me.aileronin); | ||
setprop(fcs~"elevator-fbw-output", me.elevatorin); | setprop(fcs~"elevator-fbw-output", me.elevatorin); | ||
setprop(fcs~"rudder-fbw-output", me.rudderin); | setprop(fcs~"rudder-fbw-output", me.rudderin); | ||
| Line 399: | Line 368: | ||
} | } | ||
}, | |||
update_ailerons: func { | |||
## AILERON CONTROLS | |||
### Set Aileron Direction and Roll Direction | |||
me.rolldir = 0; | |||
if (me.roll < 0) me.rolldir = -1; | |||
if (me.roll > 0) me.rolldir = 1; | |||
me.ailerondir = 0; | |||
if (me.aileronin < 0) me.ailerondir = -1; | |||
if (me.aileronin > 0) me.ailerondir = 1; | |||
if ( in_range(me.roll,[-me.banklimit,me.banklimit]) or (me.rolldir != me.ailerondir)) { | |||
if (me.aileronin > me.aileronout) me.aileronout += 0.05 * me.fpsfix; | |||
if (me.aileronin < me.aileronout) me.aileronout -= 0.05 * me.fpsfix; | |||
} else { | |||
### Don't let the plane bank past the bank limit | |||
if (me.roll < -me.banklimit) me.targetaileron = -(me.roll + me.banklimit) * 0.025; | |||
if (me.roll > me.banklimit) me.targetaileron = -(me.roll - me.banklimit) * 0.025; | |||
if (me.aileronout < me.targetaileron) me.aileronout += 0.025 * me.fpsfix; | |||
if (me.aileronout > me.targetaileron) me.aileronout -= 0.025 * me.fpsfix; | |||
} | |||
}, | }, | ||