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Ref T216, adjusted/improved ground guessing

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Klaus Basan
2018-05-05 05:05:53 +02:00
committed by Roland Winklmeier
parent 202b6b7c6a
commit ef72cf7cd4
1 changed files with 12 additions and 14 deletions
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26
src/blackmisc/aviation/aircraftsituation.cpp
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@@ -330,29 +330,26 @@ namespace BlackMisc
// not on ground is default
this->setOnGround(CAircraftSituation::NotOnGround, CAircraftSituation::OnGroundByGuessing);
// guess some values we use for guessing
CLength cg = m_cg.isNull() ? model.getCG() : m_cg;
CSpeed guessedLiftOffSpeed;
CSpeed sureLiftOffSpeed = CSpeed(130, CSpeedUnit::kts());
model.getAircraftIcaoCode().guessModelParameters(cg, guessedLiftOffSpeed);
if (!guessedLiftOffSpeed.isNull())
CSpeed guessedRotateSpeed = CSpeed::null();
CSpeed sureRotateSpeed = CSpeed(130, CSpeedUnit::kts());
model.getAircraftIcaoCode().guessModelParameters(cg, guessedRotateSpeed);
if (!guessedRotateSpeed.isNull())
{
// does the value make any sense?
const bool validGuessedSpeed = guessedLiftOffSpeed.value(CSpeedUnit::km_h()) > 5.0;
const bool validGuessedSpeed = (guessedRotateSpeed.value(CSpeedUnit::km_h()) > 5.0);
BLACK_VERIFY_X(validGuessedSpeed, Q_FUNC_INFO, "Wrong guessed value for lift off");
if (!validGuessedSpeed) { guessedLiftOffSpeed = CSpeed(80, CSpeedUnit::kts()); } // fix
sureLiftOffSpeed = guessedLiftOffSpeed * 1.25;
if (!validGuessedSpeed) { guessedRotateSpeed = CSpeed(80, CSpeedUnit::kts()); } // fix
sureRotateSpeed = guessedRotateSpeed * 1.25;
}
// "extreme" values for which we are surely not on ground
if (qAbs(this->getPitch().value(CAngleUnit::deg())) > 20) { if (details) { *details = QStringLiteral("max.pitch"); }; return true; } // some tail wheel aircraft already have 11° pitch on ground
if (qAbs(this->getBank().value(CAngleUnit::deg())) > 10) { if (details) { *details = QStringLiteral("max.bank"); }; return true; }
if (this->getGroundSpeed() > sureLiftOffSpeed) { if (details) { *details = QStringLiteral("max.gs. > ") % sureLiftOffSpeed.valueRoundedWithUnit(1); }; return true; }
if (this->getGroundSpeed() > sureRotateSpeed) { if (details) { *details = QStringLiteral("gs. > vr ") % sureRotateSpeed.valueRoundedWithUnit(1); }; return true; }
// use the most accurate or reliable guesses here first
// ------------------------------------------------------
// by elevation
// we can detect "on ground" (underflow, near ground), but not "not on ground" because of overflow
@@ -399,13 +396,14 @@ namespace BlackMisc
}
// guessed speed null -> vtol
if (!guessedLiftOffSpeed.isNull())
if (!guessedRotateSpeed.isNull())
{
// does the value make any sense?
if (this->getGroundSpeed() < guessedLiftOffSpeed)
if (this->getGroundSpeed() < guessedRotateSpeed)
{
this->setOnGround(OnGround, CAircraftSituation::OnGroundByGuessing);
if (details) { *details = QStringLiteral("Guessing, max.guessed gs.") + guessedLiftOffSpeed.valueRoundedWithUnit(CSpeedUnit::kts(), 1); }; return true;
if (details) { *details = QStringLiteral("Guessing, max.guessed gs.") + guessedRotateSpeed.valueRoundedWithUnit(CSpeedUnit::kts(), 1); };
return true;
}
}