Rewrite icing parameters computation
Remove unnecessary properties I/O.
This commit is contained in:
Colin Geniet
parent
f6e8bed92b
commit
197ce0c664
2 changed files with 62 additions and 71 deletions
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@ -3,6 +3,8 @@
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# Copyright (c) 2019 Joshua 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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@ -32,17 +34,64 @@ var Iceable = {
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};
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var dewpoint = 0;
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var temperature = 0;
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var speed = 0;
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var visibility = 0;
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var visibLclWx = 0;
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var severity = 0;
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var factor = 0;
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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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# Icing factor computation.
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var maxSpread = 0;
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var icingCond = 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 melt = 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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@ -60,7 +109,6 @@ 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 spread = 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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@ -68,11 +116,6 @@ var stateR = 0;
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var iceables = [];
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var icingInit = func {
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setprop("systems/icing/severity", "0"); # maximum severity: we will make it random
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setprop("systems/icing/factor", 0.0); # the factor is how many inches we add per second
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setprop("systems/icing/max-spread-degc", 0.0);
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setprop("systems/icing/melt-w-heat-factor", -0.00005000);
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setprop("systems/icing/icingcond", 0);
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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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@ -99,17 +142,8 @@ var icingInit = func {
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}
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var icingModel = func {
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dewpoint = getprop("environment/dewpoint-degc");
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temperature = getprop("environment/temperature-degc");
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speed = getprop("velocities/airspeed-kt");
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visibility = getprop("environment/effective-visibility-m");
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visibLclWx = getprop("environment/visibility-m");
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severity = getprop("systems/icing/severity");
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factor = getprop("systems/icing/factor");
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maxSpread = getprop("systems/icing/max-spread-degc");
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icingCond = getprop("systems/icing/icingcond");
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pause = getprop("sim/freeze/master");
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melt = getprop("systems/icing/melt-w-heat-factor");
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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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@ -127,39 +161,17 @@ var icingModel = func {
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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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if (temperature >= 0 or !icingCond) {
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setprop("systems/icing/severity", "0");
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} else if (temperature < 0 and temperature >= -2 and icingCond) {
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setprop("systems/icing/severity", "1");
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} else if (temperature < -2 and temperature >= -12 and icingCond) {
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setprop("systems/icing/severity", "3");
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} else if (temperature < -12 and temperature >= -30 and icingCond) {
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setprop("systems/icing/severity", "5");
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} else if (temperature < -30 and temperature >= -40 and icingCond) {
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setprop("systems/icing/severity", "3");
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} else if (temperature < -40 and temperature >= -99 and icingCond) {
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setprop("systems/icing/severity", "1");
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}
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var factor = icing_factor();
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foreach(iceable; iceables) {
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iceable.update(factor, melt);
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}
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# Do we create ice?
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spread = temperature - dewpoint;
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# freezing fog or low temp and below dp or in advanced wx cloud
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if ((spread < maxSpread and temperature < 0) or (temperature < 0 and visibility < 1000) or (visibLclWx < 5000 and temperature < 0)) {
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setprop("systems/icing/icingcond", 1);
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} else {
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setprop("systems/icing/icingcond", 0);
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iceable.update(factor, melt_factor);
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}
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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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@ -182,7 +194,7 @@ var icingModel = func {
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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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@ -608,27 +608,6 @@
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<output>/systems/pressurization/targetvs</output>
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</filter>
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<filter>
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<name>Icing Severity</name>
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<type>gain</type>
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<gain>1.0</gain>
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<update-interval-secs type="double">0.1</update-interval-secs>
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<input>
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<expression>
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<table>
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<property>/systems/icing/severity</property>
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<entry><ind>0</ind><dep>-0.00000166</dep></entry>
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<entry><ind>1</ind><dep> 0.00000277</dep></entry>
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<entry><ind>2</ind><dep> 0.00000277</dep></entry>
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<entry><ind>3</ind><dep> 0.00000554</dep></entry>
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<entry><ind>4</ind><dep> 0.00001108</dep></entry>
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<entry><ind>5</ind><dep> 0.00002216</dep></entry>
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</table>
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</expression>
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</input>
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<output>/systems/icing/factor</output>
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</filter>
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<filter>
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<name>TAS</name>
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<type>gain</type>
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