From 92c509725063a3a7bb348a262cbe526a2154ed08 Mon Sep 17 00:00:00 2001 From: mfranz Date: Wed, 15 Feb 2006 22:53:23 +0000 Subject: [PATCH] Stuart BUCHANAN: update; replace screenPrint with screen.log.write(); ... --- Aircraft/Generic/limits.nas | 206 ++++++++++++++++-------------------- 1 file changed, 92 insertions(+), 114 deletions(-) diff --git a/Aircraft/Generic/limits.nas b/Aircraft/Generic/limits.nas index 694e31376..0b76677a4 100644 --- a/Aircraft/Generic/limits.nas +++ b/Aircraft/Generic/limits.nas @@ -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();