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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 18:29, 11 February 2012
, 11 February 2012→/Nasal/fbw.nas: use methods to increment and decrement the throttles
m (→/Nasal/fbw.nas: introduce new helpers to help increment/decrement throttles) |
m (→/Nasal/fbw.nas: use methods to increment and decrement the throttles) |
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| Line 84: | Line 84: | ||
return ((value <= min) and (value >= max)); | return ((value <= min) and (value >= max)); | ||
} | } | ||
var fbw = { | var fbw = { | ||
| Line 175: | Line 163: | ||
# use a vector of throttles, this can be later on used to support more than | # use a vector of throttles, this can be later on used to support more than | ||
# just two engines | # just two engines | ||
# TODO: move to constructor | |||
me.throttles = [nil,nil]; | |||
throttles[0] = getprop("controls/engines/engine[0]/throttle"); | me.throttles[0] = getprop("controls/engines/engine[0]/throttle"); | ||
throttles[1] = getprop("controls/engines/engine[1]/throttle"); | me.throttles[1] = getprop("controls/engines/engine[1]/throttle"); | ||
## This is where the FBW actually does its job ;) | ## This is where the FBW actually does its job ;) | ||
| Line 234: | Line 223: | ||
### Disconnect Throttle fix if manually overridden | ### Disconnect Throttle fix if manually overridden | ||
if (throttles[0] != me.throttle) { | if (me.throttles[0] != me.throttle) { | ||
me.throttlefix = 0; | me.throttlefix = 0; | ||
me.turnthrottlefix = 0; | me.turnthrottlefix = 0; | ||
| Line 245: | Line 234: | ||
if (me.turnthrottlefix == 0) { | if (me.turnthrottlefix == 0) { | ||
me.throttleinit = throttles[0]; | me.throttleinit = me.throttles[0]; | ||
me.turnthrottlefix = 1; | me.turnthrottlefix = 1; | ||
} | } | ||
| Line 251: | Line 240: | ||
me.targetthrottle = me.throttleinit + (me.throttleinit * math.sin(math.abs(me.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 > me.throttles[0]) { | ||
throttles[0] += INCREMENT * me.fpsfix; | me.throttles[0] += INCREMENT * me.fpsfix; | ||
throttles[1] += INCREMENT * me.fpsfix; | me.throttles[1] += INCREMENT * me.fpsfix; | ||
} elsif (me.targetthrottle < throttles[0]) { | } elsif (me.targetthrottle < me.throttles[0]) { | ||
throttles[0] -= INCREMENT * me.fpsfix; | me.throttles[0] -= INCREMENT * me.fpsfix; | ||
throttles[1] -= INCREMENT * me.fpsfix; | me.throttles[1] -= INCREMENT * me.fpsfix; | ||
} | } | ||
| Line 264: | Line 253: | ||
if (throttles[0] <= me.throttleinit - 0.05) { | if (me.throttles[0] <= me.throttleinit - 0.05) { | ||
throttles[0] += INCREMENT * me.fpsfix; | me.throttles[0] += INCREMENT * me.fpsfix; | ||
throttles[1] += INCREMENT * me.fpsfix; | me.throttles[1] += INCREMENT * me.fpsfix; | ||
} elsif (throttles[0] > me.throttleinit + 0.05) { | } elsif (me.throttles[0] > me.throttleinit + 0.05) { | ||
throttles[0] -= INCREMENT * me.fpsfix; | me.throttles[0] -= INCREMENT * me.fpsfix; | ||
throttles[1] -= INCREMENT * me.fpsfix; | me.throttles[1] -= INCREMENT * me.fpsfix; | ||
} else me.turnthrottlefix = 0; | } else me.turnthrottlefix = 0; | ||
} | } | ||
| Line 275: | Line 264: | ||
### Reduce throttle if aircraft is faster than 250 KIAS under 10000 ft | ### Reduce throttle if aircraft is faster than 250 KIAS under 10000 ft | ||
if ((airspeedkt >= 250) and (altitudemsl <= 10000) and (throttles[0] != 0) and (throttles[1] != 0)) { | if ((airspeedkt >= 250) and (altitudemsl <= 10000) and (me.throttles[0] != 0) and (me.throttles[1] != 0)) { | ||
throttles[0] -= INCREMENT * me.fpsfix; | me.throttles[0] -= INCREMENT * me.fpsfix; | ||
throttles[1] -= INCREMENT * me.fpsfix; | me.throttles[1] -= INCREMENT * me.fpsfix; | ||
me.throttlefix = 1; | me.throttlefix = 1; | ||
} | } | ||
if ((me.throttlefix == 1) and (airspeedkt < 245) and (altitudemsl <= 10000) and (throttles[0] != 1) and (throttles[1] != 1)) { | if ((me.throttlefix == 1) and (airspeedkt < 245) and (altitudemsl <= 10000) and (me.throttles[0] != 1) and (throttles[1] != 1)) { | ||
throttles[0] += INCREMENT * me.fpsfix; | me.throttles[0] += INCREMENT * me.fpsfix; | ||
throttles[1] += INCREMENT * me.fpsfix; | me.throttles[1] += INCREMENT * me.fpsfix; | ||
} | } | ||
| Line 420: | Line 409: | ||
} | } | ||
} | } | ||
}, | |||
inc_throttles: func { | |||
forindex(var t; me.throttles) | |||
throttles[t] += INCREMENT * me.fpsfix; | |||
}, | |||
dec_throttles:func { | |||
forindex(var t; me.throttles) | |||
throttles[t] -= INCREMENT * me.fpsfix; | |||
}, | }, | ||
reset : func { | reset : func { | ||