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Rename equivalent airspeed (EAS) to calibrated airspeed (CAS)

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Signed-off-by: Silvan Fuhrer <silvan@auterion.com>
This commit is contained in:
Silvan Fuhrer
2020-10-05 11:38:31 +02:00
parent f8d5b09b56
commit 8f858d95e6
13 changed files with 78 additions and 80 deletions
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src/lib/airspeed/airspeed.cpp
+4 -4
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@@ -186,17 +186,17 @@ float calc_IAS(float differential_pressure)
}
float calc_TAS_from_EAS(float speed_equivalent, float pressure_ambient, float temperature_celsius)
float calc_TAS_from_CAS(float speed_calibrated, float pressure_ambient, float temperature_celsius)
{
if (!PX4_ISFINITE(temperature_celsius)) {
temperature_celsius = 15.f; // ICAO Standard Atmosphere 15 degrees celcius
}
return speed_equivalent * sqrtf(CONSTANTS_AIR_DENSITY_SEA_LEVEL_15C / get_air_density(pressure_ambient,
return speed_calibrated * sqrtf(CONSTANTS_AIR_DENSITY_SEA_LEVEL_15C / get_air_density(pressure_ambient,
temperature_celsius));
}
float calc_EAS_from_IAS(float speed_indicated, float scale)
float calc_CAS_from_IAS(float speed_indicated, float scale)
{
return speed_indicated * scale;
}
@@ -228,7 +228,7 @@ float get_air_density(float static_pressure, float temperature_celsius)
return static_pressure / (CONSTANTS_AIR_GAS_CONST * (temperature_celsius - CONSTANTS_ABSOLUTE_NULL_CELSIUS));
}
float calc_EAS_from_TAS(float speed_true, float pressure_ambient, float temperature_celsius)
float calc_CAS_from_TAS(float speed_true, float pressure_ambient, float temperature_celsius)
{
return speed_true * sqrtf(get_air_density(pressure_ambient, temperature_celsius) / CONSTANTS_AIR_DENSITY_SEA_LEVEL_15C);
}