335 lines
9.1 KiB
Text
335 lines
9.1 KiB
Text
# A3XX Icing System
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# Jonathan Redpath (legoboyvdlp)
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# Copyright (c) 2020 Josh Davidson (Octal450)
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### Ice sensitive components definition.
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var Iceable = {
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new: func(node) {
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var m = { parents: [Iceable] };
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m.ice_inches = node.getNode("ice-inches", 1);
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m.sensitivity = node.getNode("sensitivity", 1);
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var deice_prop = node.getValue("salvage-control");
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m.deice = deice_prop ? props.globals.getNode(deice_prop, 1) : nil;
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var output_prop = node.getValue("output-property");
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m.output = output_prop ? props.globals.getNode(output_prop, 1): nil;
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return m;
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},
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update: func(factor, melt) {
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var icing = me.ice_inches.getValue();
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if(me.deice != nil and me.deice.getBoolValue()) {
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icing += melt;
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} else {
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icing += factor * me.sensitivity.getValue();
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}
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if(icing < 0) icing = 0;
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me.ice_inches.setValue(icing);
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if(me.output != nil) me.output.setValue(icing);
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},
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};
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### Icing parameters computation.
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# Environmental parameters of the icing model.
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var environment = {
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dewpoint: props.globals.getNode("environment/dewpoint-degc"),
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temperature: props.globals.getNode("environment/temperature-degc"),
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visibility: props.globals.getNode("environment/effective-visibility-m"),
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visibLclWx: props.globals.getNode("environment/visibility-m"),
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};
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var effects = {
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frost_inch: props.globals.getNode("environment/aircraft-effects/frost-inch", 1),
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frost_norm: props.globals.getNode("environment/aircraft-effects/frost-level"),
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};
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# Icing factor computation.
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var maxSpread = 0;
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var severity_factor_table = [
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-0.00000166,
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0.00000277,
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0.00000277,
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0.00000554,
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0.00001108,
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0.00002216,
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];
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var melt_factor = -0.00005;
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var icing_factor = func() {
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var temperature = environment.temperature.getValue();
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var dewpoint = environment.dewpoint.getValue();
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var visibility = environment.visibility.getValue();
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var visibLclWx = environment.visibLclWx.getValue();
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# Do we create ice?
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var spread = temperature - dewpoint;
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# freezing fog or low temp and below dp or in advanced wx cloud
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var icingCond = ((spread < maxSpread or visibility < 1000 or visibLclWx < 5000)
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and temperature < 0);
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# todo: turn this into a table or something
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var severity = 0;
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if (icingCond) {
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if (temperature >= -2) {
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severity = 1;
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} else if (temperature >= -12) {
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severity = 3;
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} else if (temperature >= -30) {
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severity = 5;
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} else if (temperature >= -40) {
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severity = 3;
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} else if (temperature >= -99) {
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severity = 1;
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}
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}
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return severity_factor_table[severity];
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}
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var speed = 0;
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var pause = 0;
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var windowprobe = 0;
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var wingBtn = 0;
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var wingFault = 0;
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var wingAnti = 0;
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var PSI = 0;
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var wowl = 0;
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var wowr = 0;
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var PitotIcing = 0;
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var PitotFailed = 0;
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var lengBtn = 0;
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var lengFault = 0;
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var rengBtn = 0;
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var rengFault = 0;
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var lengAnti = 0;
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var rengAnti = 0;
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var WingHasBeenTurnedOff = 0;
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var GroundModeFinished = 0;
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var windowprb = 0;
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var stateL = 0;
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var stateR = 0;
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var iceables = [];
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var icingInit = func {
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setprop("controls/switches/windowprobeheat", 0);
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setprop("controls/switches/wing", 0);
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setprop("controls/switches/wingfault", 0);
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setprop("controls/switches/leng", 0);
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setprop("controls/switches/lengfault", 0);
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setprop("controls/switches/reng", 0);
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setprop("controls/switches/rengfault", 0);
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setprop("controls/deice/wing", 0);
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setprop("controls/deice/lengine", 0);
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setprop("controls/deice/rengine", 0);
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setprop("controls/deice/windowprobeheat", 0);
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setprop("systems/pitot/icing", 0.0);
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setprop("systems/pitot/failed", 1);
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setprop("controls/deice/WingHasBeenTurnedOff", 0);
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setprop("controls/deice/GroundModeFinished", 0);
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iceables = props.globals.getNode("sim/model/icing", 1).getChildren("iceable");
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forindex(var i; iceables) {
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iceables[i] = Iceable.new(iceables[i]);
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}
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icing_timer.start();
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}
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var icingModel = func {
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speed = getprop("velocities/airspeed-kt");
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pause = getprop("sim/freeze/master");
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windowprobe = getprop("controls/deice/windowprobeheat");
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wingBtn = getprop("controls/switches/wing");
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wingFault = getprop("controls/switches/wingfault");
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wingAnti = getprop("controls/deice/wing");
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PSI = getprop("systems/pneumatic/total-psi");
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wowl = getprop("gear/gear[1]/wow");
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wowr = getprop("gear/gear[2]/wow");
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PitotIcing = getprop("systems/pitot/icing");
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PitotFailed = getprop("systems/pitot/failed");
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lengBtn = getprop("controls/switches/leng");
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lengFault = getprop("controls/switches/lengfault");
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rengBtn = getprop("controls/switches/reng");
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rengFault = getprop("controls/switches/rengfault");
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lengAnti = getprop("controls/deice/lengine");
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rengAnti = getprop("controls/deice/rengine");
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WingHasBeenTurnedOff = getprop("controls/deice/WingHasBeenTurnedOff");
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GroundModeFinished = getprop("controls/deice/GroundModeFinished");
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var factor = icing_factor();
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foreach(iceable; iceables) {
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iceable.update(factor, melt_factor);
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}
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effects.frost_norm.setDoubleValue(effects.frost_inch.getValue() * 50);
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if (WingHasBeenTurnedOff and !wowl and !wowr and GroundModeFinished) {
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setprop("controls/deice/wing", 1);
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setprop("controls/switches/WingHasBeenTurnedOff", 0);
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}
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# If we have low pressure we have a fault
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if (PSI < 10) {
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setprop("controls/switches/wingfault", 1);
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setprop("controls/deice/wing", 0);
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}
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if (PSI > 10 and wingFault) {
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setprop("controls/switches/wingfault", 0);
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if (wingBtn) {
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setprop("controls/deice/wing", 1);
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}
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}
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if (PitotIcing > 0.03) {
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if (!PitotFailed) {
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setprop("systems/pitot/failed", 1);
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}
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} else if (PitotIcing < 0.03) {
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if (PitotFailed) {
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setprop("systems/pitot/failed", 0);
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}
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}
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# if ((getprop("systems/electrical/bus/dc-1") == 0 or getprop("systems/electrical/bus/dc-2") == 0) and getprop("fdm/jsbsim/position/wow") == 0) {
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# setprop("controls/switches/leng", 1);
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# setprop("controls/switches/reng", 1);
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# }
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#if (getprop("systems/electrical/bus/dc-ess-shed") == 0) {
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# setprop("controls/switches/wing", 0);
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#}
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}
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#################
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# LEng Anti-Ice #
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#################
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setlistener("/controls/switches/leng", func {
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if (getprop("controls/switches/leng") == 1 and getprop("engines/engine[0]/state") == 3) {
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setprop("controls/switches/lengfault", 1);
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settimer(func() {
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setprop("controls/switches/lengfault", 0);
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setprop("controls/deice/lengine", 1);
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}, 0.5);
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} else if (getprop("controls/switches/leng") == 0) {
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setprop("controls/switches/lengfault", 1);
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settimer(func() {
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setprop("controls/switches/lengfault", 0);
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setprop("controls/deice/lengine", 0);
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}, 0.5);
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}
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});
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setlistener("/engines/engine[0]/state", func {
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if (getprop("engines/engine[0]/state") != 3) {
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setprop("controls/switches/leng", 0);
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}
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});
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#################
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# REng Anti-Ice #
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#################
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setlistener("/controls/switches/reng", func {
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if (getprop("controls/switches/reng") == 1 and getprop("engines/engine[1]/state") == 3) {
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setprop("controls/switches/rengfault", 1);
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settimer(func() {
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setprop("controls/switches/rengfault", 0);
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setprop("controls/deice/rengine", 1);
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}, 0.5);
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} else if (getprop("controls/switches/reng") == 0) {
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setprop("controls/switches/rengfault", 1);
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settimer(func() {
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setprop("controls/switches/rengfault", 0);
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setprop("controls/deice/rengine", 0);
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}, 0.5);
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}
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});
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setlistener("/engines/engine[1]/state", func {
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if (getprop("engines/engine[1]/state") != 3) {
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setprop("controls/switches/reng", 0);
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}
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});
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##################
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# Probe Anti-Ice #
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##################
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setlistener("/controls/switches/windowprobeheat", func {
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windowprb = getprop("controls/switches/windowprobeheat");
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if (windowprb == 0.5) { # if in auto
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wowl = getprop("gear/gear[1]/wow");
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wowr = getprop("gear/gear[2]/wow");
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stateL = getprop("engines/engine[0]/state");
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stateR = getprop("engines/engine[1]/state");
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if (!wowl or !wowr) {
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setprop("controls/deice/windowprobeheat", 1);
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} else if (stateL == 3 or stateR == 3) {
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setprop("controls/deice/windowprobeheat", 1);
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}
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} else if (windowprb == 1) { # if in ON
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setprop("controls/deice/windowprobeheat", 1);
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} else {
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setprop("controls/deice/windowprobeheat", 0);
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}
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});
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#################
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# Wing Anti-Ice #
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#################
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# Switching on the wing anti-ice
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setlistener("/controls/switches/wing", func {
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wowl = getprop("gear/gear[1]/wow");
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wowr = getprop("gear/gear[2]/wow");
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wingBtn = getprop("controls/switches/wing");
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if (wowl and wowr and wingBtn) {
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setprop("controls/switches/wingfault", 1);
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settimer(func() {
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setprop("controls/switches/wingfault", 0);
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setprop("controls/deice/wing", 1);
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}, 0.5);
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settimer(func() {
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setprop("controls/deice/WingHasBeenTurnedOff", 1);
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setprop("controls/deice/wing", 0);
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}, 30.5);
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settimer(func() {
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setprop("controls/deice/GroundModeFinished", 1);
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}, 31);
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} else if (wingBtn and !wowl and !wowr) { # In the air
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setprop("controls/switches/wingfault", 1);
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settimer(func() {
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setprop("controls/switches/wingfault", 0);
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setprop("controls/deice/wing", 1);
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}, 0.5);
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} else if (!wingBtn) {
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setprop("controls/switches/wingfault", 1);
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settimer(func() {
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setprop("controls/switches/wingfault", 0);
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setprop("controls/deice/wing", 0);
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}, 0.5);
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}
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});
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###################
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# Update Function #
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###################
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var update_Icing = func {
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icingModel();
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}
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var icing_timer = maketimer(0.2, update_Icing);
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icing_timer.simulatedTime = 1;
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