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Merge pull request #3332 from shellixyz/fix_rth_hover

Fix RTH hover above home
This commit is contained in:
Alberto García Hierro 2018-06-11 12:54:35 +01:00 committed by GitHub
commit f7f34ea1ab
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GPG key ID: 4AEE18F83AFDEB23
4 changed files with 88 additions and 58 deletions

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@ -192,6 +192,7 @@ static navigationFSMEvent_t navOnEnteringState_NAV_STATE_RTH_INITIALIZE(navigati
static navigationFSMEvent_t navOnEnteringState_NAV_STATE_RTH_CLIMB_TO_SAFE_ALT(navigationFSMState_t previousState);
static navigationFSMEvent_t navOnEnteringState_NAV_STATE_RTH_HEAD_HOME(navigationFSMState_t previousState);
static navigationFSMEvent_t navOnEnteringState_NAV_STATE_RTH_HOVER_PRIOR_TO_LANDING(navigationFSMState_t previousState);
static navigationFSMEvent_t navOnEnteringState_NAV_STATE_RTH_HOVER_ABOVE_HOME(navigationFSMState_t previousState);
static navigationFSMEvent_t navOnEnteringState_NAV_STATE_RTH_LANDING(navigationFSMState_t previousState);
static navigationFSMEvent_t navOnEnteringState_NAV_STATE_RTH_FINISHING(navigationFSMState_t previousState);
static navigationFSMEvent_t navOnEnteringState_NAV_STATE_RTH_FINISHED(navigationFSMState_t previousState);
@ -361,6 +362,24 @@ static const navigationFSMStateDescriptor_t navFSM[NAV_STATE_COUNT] = {
.onEvent = {
[NAV_FSM_EVENT_TIMEOUT] = NAV_STATE_RTH_HOVER_PRIOR_TO_LANDING,
[NAV_FSM_EVENT_SUCCESS] = NAV_STATE_RTH_LANDING,
[NAV_FSM_EVENT_SWITCH_TO_RTH_HOVER_ABOVE_HOME] = NAV_STATE_RTH_HOVER_ABOVE_HOME,
[NAV_FSM_EVENT_SWITCH_TO_IDLE] = NAV_STATE_IDLE,
[NAV_FSM_EVENT_SWITCH_TO_ALTHOLD] = NAV_STATE_ALTHOLD_INITIALIZE,
[NAV_FSM_EVENT_SWITCH_TO_POSHOLD_3D] = NAV_STATE_POSHOLD_3D_INITIALIZE,
[NAV_FSM_EVENT_SWITCH_TO_EMERGENCY_LANDING] = NAV_STATE_EMERGENCY_LANDING_INITIALIZE,
}
},
[NAV_STATE_RTH_HOVER_ABOVE_HOME] = {
.persistentId = NAV_PERSISTENT_ID_RTH_HOVER_ABOVE_HOME,
.onEntry = navOnEnteringState_NAV_STATE_RTH_HOVER_ABOVE_HOME,
.timeoutMs = 500,
.stateFlags = NAV_CTL_ALT | NAV_CTL_POS | NAV_CTL_YAW | NAV_REQUIRE_ANGLE | NAV_REQUIRE_MAGHOLD | NAV_REQUIRE_THRTILT | NAV_AUTO_RTH | NAV_RC_POS | NAV_RC_YAW | NAV_RC_ALT,
.mapToFlightModes = NAV_RTH_MODE | NAV_ALTHOLD_MODE,
.mwState = MW_NAV_STATE_HOVER_ABOVE_HOME,
.mwError = MW_NAV_ERROR_NONE,
.onEvent = {
[NAV_FSM_EVENT_TIMEOUT] = NAV_STATE_RTH_HOVER_ABOVE_HOME,
[NAV_FSM_EVENT_SWITCH_TO_IDLE] = NAV_STATE_IDLE,
[NAV_FSM_EVENT_SWITCH_TO_ALTHOLD] = NAV_STATE_ALTHOLD_INITIALIZE,
[NAV_FSM_EVENT_SWITCH_TO_POSHOLD_3D] = NAV_STATE_POSHOLD_3D_INITIALIZE,
@ -925,12 +944,12 @@ static navigationFSMEvent_t navOnEnteringState_NAV_STATE_RTH_HOVER_PRIOR_TO_LAND
// Wait until target heading is reached (with 15 deg margin for error)
if (STATE(FIXED_WING)) {
resetLandingDetector();
return NAV_FSM_EVENT_SUCCESS;
return navigationRTHAllowsLanding() ? NAV_FSM_EVENT_SUCCESS : NAV_FSM_EVENT_SWITCH_TO_RTH_HOVER_ABOVE_HOME;
}
else {
if (ABS(wrap_18000(posControl.homeWaypointAbove.yaw - posControl.actualState.yaw)) < DEGREES_TO_CENTIDEGREES(15)) {
resetLandingDetector();
return NAV_FSM_EVENT_SUCCESS;
return navigationRTHAllowsLanding() ? NAV_FSM_EVENT_SUCCESS : NAV_FSM_EVENT_SWITCH_TO_RTH_HOVER_ABOVE_HOME;
}
else if (!validateRTHSanityChecker()) {
// Continue to check for RTH sanity during pre-landing hover
@ -947,6 +966,16 @@ static navigationFSMEvent_t navOnEnteringState_NAV_STATE_RTH_HOVER_PRIOR_TO_LAND
}
}
static navigationFSMEvent_t navOnEnteringState_NAV_STATE_RTH_HOVER_ABOVE_HOME(navigationFSMState_t previousState)
{
UNUSED(previousState);
if (!(validateRTHSanityChecker() || (posControl.flags.estPosStatus >= EST_USABLE) || !checkForPositionSensorTimeout()))
return NAV_FSM_EVENT_SWITCH_TO_EMERGENCY_LANDING;
return NAV_FSM_EVENT_NONE;
}
static navigationFSMEvent_t navOnEnteringState_NAV_STATE_RTH_LANDING(navigationFSMState_t previousState)
{
UNUSED(previousState);
@ -963,28 +992,26 @@ static navigationFSMEvent_t navOnEnteringState_NAV_STATE_RTH_LANDING(navigationF
return NAV_FSM_EVENT_SWITCH_TO_EMERGENCY_LANDING;
}
if (navigationRTHAllowsLanding()) {
float descentVelLimited = 0;
float descentVelLimited = 0;
// A safeguard - if surface altitude sensors is available and it is reading < 50cm altitude - drop to low descend speed
if ((posControl.flags.estAglStatus == EST_TRUSTED) && posControl.actualState.agl.pos.z < 50.0f) {
// land_descent_rate == 200 : descend speed = 30 cm/s, gentle touchdown
// Do not allow descent velocity slower than -30cm/s so the landing detector works.
descentVelLimited = MIN(-0.15f * navConfig()->general.land_descent_rate, -30.0f);
}
else {
// Ramp down descent velocity from 100% at maxAlt altitude to 25% from minAlt to 0cm.
float descentVelScaling = (navGetCurrentActualPositionAndVelocity()->pos.z - posControl.homePosition.pos.z - navConfig()->general.land_slowdown_minalt)
/ (navConfig()->general.land_slowdown_maxalt - navConfig()->general.land_slowdown_minalt) * 0.75f + 0.25f; // Yield 1.0 at 2000 alt and 0.25 at 500 alt
descentVelScaling = constrainf(descentVelScaling, 0.25f, 1.0f);
// Do not allow descent velocity slower than -50cm/s so the landing detector works.
descentVelLimited = MIN(-descentVelScaling * navConfig()->general.land_descent_rate, -50.0f);
}
updateClimbRateToAltitudeController(descentVelLimited, ROC_TO_ALT_NORMAL);
// A safeguard - if surface altitude sensors is available and it is reading < 50cm altitude - drop to low descend speed
if ((posControl.flags.estAglStatus == EST_TRUSTED) && posControl.actualState.agl.pos.z < 50.0f) {
// land_descent_rate == 200 : descend speed = 30 cm/s, gentle touchdown
// Do not allow descent velocity slower than -30cm/s so the landing detector works.
descentVelLimited = MIN(-0.15f * navConfig()->general.land_descent_rate, -30.0f);
}
else {
// Ramp down descent velocity from 100% at maxAlt altitude to 25% from minAlt to 0cm.
float descentVelScaling = (navGetCurrentActualPositionAndVelocity()->pos.z - posControl.homePosition.pos.z - navConfig()->general.land_slowdown_minalt)
/ (navConfig()->general.land_slowdown_maxalt - navConfig()->general.land_slowdown_minalt) * 0.75f + 0.25f; // Yield 1.0 at 2000 alt and 0.25 at 500 alt
descentVelScaling = constrainf(descentVelScaling, 0.25f, 1.0f);
// Do not allow descent velocity slower than -50cm/s so the landing detector works.
descentVelLimited = MIN(-descentVelScaling * navConfig()->general.land_descent_rate, -50.0f);
}
updateClimbRateToAltitudeController(descentVelLimited, ROC_TO_ALT_NORMAL);
return NAV_FSM_EVENT_NONE;
}