feat(brakes): better brakes simulation (#8793)

* current state dump * move brake simulation to aircraft specific module * adjust wheel SD page to new brake temperature signals * remove old brake temperature simulation code * fix tests * adjust A380 brake properties to more realistic numbers * add wheel rpm variables to A380X systems * feat: added quantization of temperature values sent over arinc * fix: add cutoff for slow rotating wheels * feat: add simvars for the reported brake temperatures * refactor: fix linting * move assignment out of loop * some fixes * remove reference to old brake simulation * add changelog entry * remove obsolete code * some fixes in the cooling physics * fix changelog * added some small tests * fix linting * move changelog entry to end * fix calculation of brake probe temperature gradient * couple sound to brake fan instead of brake fan button * put changelog entry at the end * remove duplicated entries * fix compilation error * fix lint
flybywiresim · Nov 17, 2024 · 2f939d3 · 2f939d3
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diff --git a/.github/CHANGELOG.md b/.github/CHANGELOG.md
@@ -64,6 +64,7 @@
 1. [A380X/FMS] Added SURV Status & Switching page with TCAS fault indication - @Frenkii (Moritz)
 1. [FMS] Fix T/D not showing in selected speed - @BlueberryKing (BlueberryKing)
 1. [FMS] Fix Pause at T/D not working in selected speed - @BlueberryKing (BlueberryKing)
+1. [MISC] Replaced brake temperature simulation with physics based model of brakes - @Gurgel100 (Pascal)
 
 ## 0.12.0
 

diff --git a/fbw-a32nx/docs/a320-simvars.md b/fbw-a32nx/docs/a320-simvars.md
@@ -71,16 +71,24 @@
     - represents the brake temperature of the rear wheels
 
 - A32NX_REPORTED_BRAKE_TEMPERATURE_{1,2,3,4}
-    - celsius
-    - represents the reported brake temperature of the rear wheels by the sensor.
+    - `Arinc429Word<Celsius>`
+    - represents the reported brake temperature of the main wheels reported by the BSCU.
     - It can be different from the brake temperature when the brake fan has been used, because the brake fan will cool
       the sensor more than the brakes
     - (which have much more energy to dissipate) therefore giving potentially erroneous readings that the pilots must
       take into account
 
-- A32NX_BRAKE_FAN
+- A32NX_BRAKE_FAN_RUNNING
+    - boolean
+    - whether or not the brake fan is running
+      (brake fan button pressed AND left main landing gear down and locked, reported by BSCU)
+
+- A32NX_BRAKE_FAN_{side}_RUNNING
     - boolean
-    - whether or not the brake fan is running (brake fan button pressed AND left main landing gear down and locked)
+    - wether or not a brake fan on the corresponding side is running
+    - {side}
+        - LEFT
+        - RIGHT
 
 - A32NX_BRAKE_FAN_BTN_PRESSED
     - boolean

diff --git a/...ire-aircraft-a320-neo/SimObjects/AirPlanes/FlyByWire_A320_NEO/model/A320_NEO_INTERIOR.xml b/...ire-aircraft-a320-neo/SimObjects/AirPlanes/FlyByWire_A320_NEO/model/A320_NEO_INTERIOR.xml
@@ -1032,7 +1032,7 @@
                 <TOGGLE_SIMVAR>L:A32NX_BRAKE_FAN_BTN_PRESSED</TOGGLE_SIMVAR>
                 <SEQ2_EMISSIVE_DRIVES_VISIBILITY>False</SEQ2_EMISSIVE_DRIVES_VISIBILITY>
                 <SEQ1_CODE>(L:A32NX_BRAKES_HOT, Bool)</SEQ1_CODE>
-                <SEQ2_CODE>(L:A32NX_BRAKE_FAN, Bool)</SEQ2_CODE>
+                <SEQ2_CODE>(L:A32NX_BRAKE_FAN_BTN_PRESSED, Bool)</SEQ2_CODE>
                 <SEQ_POWERED>(L:A32NX_ELEC_AC_2_BUS_IS_POWERED, Bool)</SEQ_POWERED>
                 <TOOLTIPID>%((L:A32NX_BRAKE_FAN_BTN_PRESSED, Bool))%{if}Turn OFF brake fan%{else}Turn ON brake fan%{end}</TOOLTIPID>
             </UseTemplate>

diff --git a/.../base/flybywire-aircraft-a320-neo/SimObjects/AirPlanes/FlyByWire_A320_NEO/sound/sound.xml b/.../base/flybywire-aircraft-a320-neo/SimObjects/AirPlanes/FlyByWire_A320_NEO/sound/sound.xml
@@ -490,45 +490,46 @@
         </Sound>
 
 
-        <Sound WwiseData="true" WwiseEvent="brakefan" NodeName="BASE_LEFT" FadeOutType="2" FadeOutTime="0.5" LocalVar="A32NX_BRAKE_FAN" Units="BOOL" Index="0">
+        <Sound WwiseData="true" WwiseEvent="brakefan" NodeName="BASE_LEFT" FadeOutType="2" FadeOutTime="0.5" LocalVar="A32NX_BRAKE_FAN_LEFT_RUNNING" Units="BOOL" Index="0">
             <Range LowerBound="1.0" />
             <WwiseRTPC SimVar="TURB ENG N1" Units="percent" Index="1" RTPCName="SIMVAR_TURB_ENG_N1" />
-            <Requires LocalVar="A32NX_ELEC_AC_1_BUS_IS_POWERED" Units="Bool" Index="1">
-                <Range LowerBound="1" />
-            </Requires>
             <WwiseRTPC LocalVar="A32NX_SOUND_EXTERIOR_MASTER" Units="number" Index="0" RTPCName="LOCALVAR_A32NX_EXTERIOR_VOLUME" />
         </Sound>
 
-        <Sound WwiseData="true" WwiseEvent="brakefan2" NodeName="BASE_RIGHT" FadeOutType="2" FadeOutTime="0.5" LocalVar="A32NX_BRAKE_FAN" Units="BOOL" Index="0">
+        <Sound WwiseData="true" WwiseEvent="brakefan2" NodeName="BASE_RIGHT" FadeOutType="2" FadeOutTime="0.5" LocalVar="A32NX_BRAKE_FAN_RIGHT_RUNNING" Units="BOOL" Index="0">
             <Range LowerBound="1.0" />
             <WwiseRTPC SimVar="TURB ENG N1" Units="percent" Index="1" RTPCName="SIMVAR_TURB_ENG_N1" />
-            <Requires LocalVar="A32NX_ELEC_AC_1_BUS_IS_POWERED" Units="Bool" Index="1">
-                <Range LowerBound="1" />
-            </Requires>
             <WwiseRTPC LocalVar="A32NX_SOUND_EXTERIOR_MASTER" Units="number" Index="0" RTPCName="LOCALVAR_A32NX_EXTERIOR_VOLUME" />
         </Sound>
 
-        <Sound WwiseData="true" WwiseEvent="brakefanshut" NodeName="BASE_LEFT" Continuous="false" LocalVar="A32NX_BRAKE_FAN" Units="BOOL" Index="0">
+        <Sound WwiseData="true" WwiseEvent="brakefanshut" NodeName="BASE_LEFT" Continuous="false" LocalVar="A32NX_BRAKE_FAN_LEFT_RUNNING" Units="BOOL" Index="0">
             <Range UpperBound="0" />
             <WwiseRTPC SimVar="TURB ENG N1" Units="percent" Index="1" RTPCName="SIMVAR_TURB_ENG_N1" />
             <WwiseRTPC LocalVar="A32NX_SOUND_EXTERIOR_MASTER" Units="number" Index="0" RTPCName="LOCALVAR_A32NX_EXTERIOR_VOLUME" />
         </Sound>
 
-        <Sound WwiseData="true" WwiseEvent="brakefanshut" NodeName="BASE_RIGHT" Continuous="false" LocalVar="A32NX_BRAKE_FAN" Units="BOOL" Index="0">
+        <Sound WwiseData="true" WwiseEvent="brakefanshut" NodeName="BASE_RIGHT" Continuous="false" LocalVar="A32NX_BRAKE_FAN_RIGHT_RUNNING" Units="BOOL" Index="0">
             <Range UpperBound="0" />
             <WwiseRTPC SimVar="TURB ENG N1" Units="percent" Index="1" RTPCName="SIMVAR_TURB_ENG_N1" />
             <WwiseRTPC LocalVar="A32NX_SOUND_EXTERIOR_MASTER" Units="number" Index="0" RTPCName="LOCALVAR_A32NX_EXTERIOR_VOLUME" />
         </Sound>
 
-        <Sound WwiseData="true" WwiseEvent="intbrakefan" NodeName="BASE_LEFT" FadeOutType="2" FadeOutTime="0.5" LocalVar="A32NX_BRAKE_FAN" Units="BOOL" Index="0">
+        <Sound WwiseData="true" WwiseEvent="intbrakefan" NodeName="BASE_LEFT" FadeOutType="2" FadeOutTime="0.5" LocalVar="A32NX_BRAKE_FAN_LEFT_RUNNING" Units="BOOL" Index="0">
+            <Range LowerBound="1.0" />
+            <WwiseRTPC SimVar="TURB ENG N1" Units="percent" Index="1" RTPCName="SIMVAR_TURB_ENG_N1" />
+        </Sound>
+
+        <Sound WwiseData="true" WwiseEvent="intbrakefanshut" NodeName="BASE_LEFT" Continuous="false" LocalVar="A32NX_BRAKE_FAN_LEFT_RUNNING" Units="BOOL" Index="0">
+            <Range UpperBound="0" />
+            <WwiseRTPC SimVar="TURB ENG N1" Units="percent" Index="1" RTPCName="SIMVAR_TURB_ENG_N1" />
+        </Sound>
+
+        <Sound WwiseData="true" WwiseEvent="intbrakefan" NodeName="BASE_RIGHT" FadeOutType="2" FadeOutTime="0.5" LocalVar="A32NX_BRAKE_FAN_RIGHT_RUNNING" Units="BOOL" Index="0">
             <Range LowerBound="1.0" />
             <WwiseRTPC SimVar="TURB ENG N1" Units="percent" Index="1" RTPCName="SIMVAR_TURB_ENG_N1" />
-            <Requires LocalVar="A32NX_ELEC_AC_1_BUS_IS_POWERED" Units="Bool" Index="1">
-                <Range LowerBound="1" />
-            </Requires>
         </Sound>
 
-        <Sound WwiseData="true" WwiseEvent="intbrakefanshut" NodeName="BASE_LEFT" Continuous="false" LocalVar="A32NX_BRAKE_FAN" Units="BOOL" Index="0">
+        <Sound WwiseData="true" WwiseEvent="intbrakefanshut" NodeName="BASE_RIGHT" Continuous="false" LocalVar="A32NX_BRAKE_FAN_RIGHT_RUNNING" Units="BOOL" Index="0">
             <Range UpperBound="0" />
             <WwiseRTPC SimVar="TURB ENG N1" Units="percent" Index="1" RTPCName="SIMVAR_TURB_ENG_N1" />
         </Sound>