- The goal is to use all the possible (set by the user) horizontal thrust first and then tilt if necessary, thus achieving minimum possible tilt.
- This is an implementation of the following paper for OMNI_ATT_MODE = 1:
"A Daisy-Chain Control Design for a Multirotor UAV with Direct Force Capabilities", M. Hamza and E.N. Johnson, 2017 AIAA GNC Conference
- Still need to define a parameter for the maximum direct force
- OMNI_MAX_HOR_THR parameter specifies the maximum horizontal thrust compared to the maximum possible thrust generated by the vehicle for an omnidirectional multirotor
- Some observations:
- It's still not as smooth as expected (or maybe I'm not a good pilot)
- Acceleration on the body X axis feels lower than the body Y axis (no idea why)
- Flight tested in Gazebo sim in both Manual and Autonomous modes
- The range for 3D-thrust in the 6-DOF multirotor mixer is changed to -1 to 1 now (fixed from 0 to 1)
- The Z thrust in the 6-DOF multirotor mixer is mapped to the Z-thrust command now (fixed from thrust command)
- The manual Z command in the rate controller maps to the negative Z-thrust (fixed from positive Z)
- The variable _thrust_body_sp in the rate controller renamed to _thrust_sp to be compatible with the older variable removed in the last commit
- The code tested in TakeOff, Manual, Hold, Position and Land modes on both tilted hex and iris
Accepting and working with 3D thrust commands now
- Tilt-Hex flies like a normal hex but with the new 6-dof mixer now (with some jitters)
- Some minor parameter changes in the hexa_x_tilt definition to make the simulated flight smoother
- landed, maybe_landed, or ground_contact required before the safety
button is able to disarm
- this reduces the risk of a faulty safety button triggering in regular
flight
- this is a new module for temperature compensation that consolidates the functionality previously handled in the sensors module (calculating runtime thermal corrections) and the events module (online thermal calibration)
- by collecting this functionality into a single module we can optionally disable it on systems where it's not used and save some flash (if disabled at build time) or memory (disabled at run time)
When having no velocity estimate the derivative was updated with zero.
When losing the velocity estimate this is fine since the resulting
derivative spike doesn't get used and acceleration is set to NAN.
But when regaining the velocity estimate the spike from zero to
the first estimated velocity gets used as acceleration in the position
controller and results in a twitch.
To solve this I use the derivative reset I introduced in pr #13522
commit b64abf48b2
This caused bad altitude control performance when enabling
terrain following. It even leads to complete vertical control
instability in case dist_bottom is inaccurate.
Relying on the estimator states is the way to go instead of
silently using one altitude source as state.
- split out integrated data into new standalone messages (sensor_accel_integrated and sensor_gyro_integrated)
- publish sensor_gyro at full rate and remove sensor_gyro_control
- limit sensor status publications to 10 Hz
- remove unused accel/gyro raw ADC fields
- add device IDs to sensor_bias and sensor_correction
- vehicle_angular_velocity/vehicle_acceleration: check device ids before using bias and corrections
- this provides some extra space when the FIFO transfers don't align perfectly
- I've also made an effort to keep the different drivers (icm20602, icm20608g, ism330ldc) in sync so we can factor out the common portions later once we've confident in the pattern.
* Treat UAVS diffrently from manned aviation
* Added fake_traffic testing functionality,
* Added NAV_TRAFF_AVOID Hold and Landmode
* Added Behavior: HOLD Position to collision avoidance mode and implemented Landmode to collision avoidance.
Boards where no Hardware GUID is defined will send 0 as GUID.
Right now collision avoidance for more than one FMU without Hardware GUID is not possible.
We should consider adding a randomly generated HW GUID as a placeholder for legacy Boards
Azarakhsh Keipour