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Stuart BUCHANAN: update; replace screenPrint with screen.log.write(); ...

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mfranz 2006-02-15 22:53:23 +00:00
parent 83257a80b8
commit 92c5097250
1 changed files with 92 additions and 114 deletions
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206
Aircraft/Generic/limits.nas
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@ -1,150 +1,128 @@
# $Id$
#
# Nasal script to print errors to the screen when aircraft exceed design limits:
# - extending flaps above maximum flap extension speed
# - extending flaps above maximum flap extension speed(s)
# - extending gear above maximum gear extension speed
# - exceeding Vna
# - exceeding structural G limits
#
#
# to use, define one or more of
# limits/max-flap-extension-speed
# To use, include this .nas file and define one or more of
# limits/max-flap-extension-speed/speed
# limits/max-flap-extension-speed/flaps
# limits/vne
# limits/max-gear-extension-speed
# limits/max-positive-g
# limits/max-negative-g (must be defined in max-positive-g defined)
#
# then include this .nas file in the aircraft XML. Note that .nas file must be
# included _after_ limits have been defined.
#
# You can defined multiple max-flap-extension-speed entries, for max extension
# speeds for different flap settings.
checkFlaps = func {
airspeed = getprop("velocities/airspeed-kt");
flapsetting = cmdarg().getValue();
ltext = "";
limits = props.globals.getNode("limits");
if ((limits != nil) and (limits.getChildren("max-flap-extension-speed") != nil))
{
children = limits.getChildren("max-flap-extension-speed");
foreach(c; children)
{
if ((c.getChild("flaps") != nil) and
(c.getChild("speed") != nil) )
{
flaps = c.getChild("flaps").getValue();
speed = c.getChild("speed").getValue();
if ((flaps != nil) and
(speed != nil) and
(flapsetting > flaps) and
(airspeed > speed) )
{
ltext = "Flaps extended above maximum flap extension speed!";
}
}
}
if (ltext != "")
{
screen.log.write(ltext);
}
}
}
# ==================================== timer stuff ===========================================
checkGear = func {
airspeed = getprop("velocities/airspeed-kt");
max_gear = cmdarg().getValue();
# set the update period
if ((max_gear != nil) and (airspeed > max_gear))
{
screen.log.write("Gear extended above maximum extension speed!");
}
}
UPDATE_PERIOD = 0.3;
# set the timer for the selected function
registerTimer = func {
settimer(arg[0], UPDATE_PERIOD);
} # end function
# =============================== end timer stuff ===========================================
# Set the listeners
setlistener("controls/flight/flaps", checkFlaps);
setlistener("controls/gear/gear-down", checkGear);
# =============================== Pilot G stuff (taken from hurricane.nas) =================================
pilot_g = props.globals.getNode("fdm/jsbsim/accelerations/a-pilot-z-ft_sec2", 1);
timeratio = props.globals.getNode("accelerations/timeratio", 1);
pilot_g_damped = props.globals.getNode("fdm/jsbsim/accelerations/damped-a-pilot-z-ft_sec2", 1);
pilot_g.setDoubleValue(0);
pilot_g_damped.setDoubleValue(0);
timeratio.setDoubleValue(0.03);
g_damp = 0;
var g_damp = 0;
updatePilotG = func {
var n = timeratio.getValue();
var g = pilot_g.getValue() ;
#if (g == nil) { g = 0; }
g_damp = ( g * n) + (g_damp * (1 - n));
var g = pilot_g.getValue() ;
#if (g == nil) { g = 0; }
g_damp = ( g * 0.2) + (g_damp * 0.8);
pilot_g_damped.setDoubleValue(g_damp);
settimer(updatePilotG, 0.1);
} #end updatePilotG()
settimer(updatePilotG, 0.2);
}
updatePilotG();
# ======================= Load/Speed limits =========================
checkGandVNE = func {
max_positive = getprop("limits/max-positive-g");
max_negative = getprop("limits/max-negative-g");
msg = "";
if ((getprop("limits/max-flap-extension-speed") != nil) or
(getprop("limits/vne") != nil) or
(getprop("limits/max-gear-extension-speed") != nil) or
(getprop("limits/max-positive-g") != nil))
{
setprop("/accelerations/pilot/z-accel-fps_sec",0);
checkLimits = func {
# Convert the ft/sec^2 into Gs - allowing for gravity.
g = (- g_damp) / 32;
# Flaps extension speed check
if (getprop("limits/max-flap-extension-speed") != nil)
{
if ((getprop("surface-positions/flap-pos-norm") > 0) and
(getprop("velocities/airspeed-kt") > getprop("limits/max-flap-extension-speed")) and
(getprop("limits/flap-warning-displayed") != 1))
{
# display a warning once
screenPrint("Flaps extended above maximum flap extension speed!");
setprop("limits/flap-warning-displayed", 1);
}
if ((getprop("surface-positions/flap-pos-norm") == 0) or
(getprop("velocities/airspeed-kt") < getprop("limits/max-flap-extension-speed")))
{
#reset warning message
setprop("limits/flap-warning-displayed", 0);
}
}
if ((max_positive != nil) and (g > max_positive))
{
msg = "Airframe structural positive-g load limit exceeded!";
}
# G-loads check - both limits must be defined
if (getprop("limits/max-positive-g") != nil)
{
# Convert the ft/sec^2 into Gs - allowing for gravity.
g = (- getprop("/fdm/jsbsim/accelerations/damped-a-pilot-z-ft_sec2")) / 32;
setprop("limits/current-g", g);
if ((max_negative != nil) and (g < max_negative))
{
msg = "Airframe structural negative-g load limit exceeded!";
}
if (g < getprop("limits/max-negative-g"))
{
screenPrint("Airframe structural negative-g load limit exceeded!");
}
# Now check VNE
airspeed = getprop("velocities/airspeed-kt");
vne = getprop("limits/vne");
if (g > getprop("limits/max-positive-g"))
{
screenPrint("Airframe structural positive-g load limit exceeded!");
}
}
if ((airspeed != nil) and (vne != nil) and (airspeed > vne))
{
msg = "Airspeed exceeds Vne!";
}
# Vne speed check
if (getprop("limits/vne") != nil)
{
# Simply check we haven't exceeded the maximum speed for the aircraft
if (getprop("velocities/airspeed-kt") > getprop("limits/vne"))
{
screenPrint("Airspeed exceeds Vne!");
}
}
# Gear extension speed check. We check whether the gear is being extended or retracted.
if (getprop("limits/max-gear-extension-speed") != nil)
{
if ((getprop("gear/gear[0]/position-norm") != getprop("/controls/gear/gear-down")) and
(getprop("velocities/airspeed-kt") > getprop("limits/max-gear-extension-speed")) and
(getprop("limits/gear-warning-displayed") != 1))
{
# display a warning once
screenPrint("Gear extended above maximum gear extension speed!");
setprop("limits/gear-warning-displayed", 1);
}
if ((getprop("gear/gear[0]/position-norm") == getprop("/controls/gear/gear-down")) or
(getprop("velocities/airspeed-kt") < getprop("limits/max-gear-extension-speed")))
{
#reset warning message
setprop("limits/gear-warning-displayed", 0);
}
}
registerTimer(checkLimits);
}
if (msg != "")
{
# If we have a message, display it, but don't bother checking for
# any other errors for 10 seconds. Otherwise we're likely to get
# repeated messages.
screen.log.write(msg);
settimer(checkGandVNE, 10);
}
else
{
settimer(checkGandVNE, 1);
}
}
checkLimits();
checkGandVNE();