dt could drive the alpha filter crazy because of the small dt
approximation during the computation of the coefficient.
- Remove unused bitmask packing of the innovation checks
* Enable velocity control for rover
* Address comments
* Use pid for speed control
* Calculate steering commands correctly
* Use local velocity estimates to avoid global position dependency
And fix some IO bugs:
- PX4IO_P_STATUS_FLAGS_RAW_PWM was never cleared. This meant that after a
'pwm test' command, normal mixing was not possible anymore.
Fixed by remembering when we are in test mode and not sending
PX4IO_PAGE_CONTROLS during that time. PX4IO_P_STATUS_FLAGS_RAW_PWM is
cleared when PX4IO_PAGE_CONTROLS are received.
- when entering test mode w/o specifying all channels, the other channels
were not set at all, which means they could still be set to values from
a previous test call.
This is fixed by setting all channels to disarmed when entering/leaving
test mode.
The quaternion to inverse rotation matrix function has been updated so that the rotation it produces is the inverse to that produced by the matrix library and the the inverse of the quaternion is uses. This function is now used to directly calculate an inverse rotation matrix rather than calculating the forward rotation and then transposing it.
* ekf2: Add FirstOrderLpf and InnovationLpf classes for innovation lowpass filtering
* ekf2: use InnovLpf filter class in preflight checks
* ekf2: move selection of yaw test limit for pre-flight check in function
* ekf2: Move pre-flight checks into separate function
* ekf2: use static constexpr insetead of inline for sq (square) function
* ekf2: Split pre-flight checks in separate functions
Also use the same check for all the innovations:
innov_lpf < test and innov < 2xtest
* ekf2: Add optical flow pre-flight check
* ekf2: Combine FirstOrderLpf and InnovationLpf in single class
* ekf2: check vel_pos_innov when ev_pos is active as well
* ekf2: transform InnovationLpf into a header only library and pass the
spike limit during the update call to avoid storing it here
* ekf2: Static and const cleanup
- set spike_lim constants as static constexpr, set innovation
- set checker helper functions as static
- rename the mix of heading and yaw as heading to avoid confusion
* ekf2: use ternary operator in selectHeadingTestLimit instead of if-else
* ekf2: store intermediate redults in const bool flags. Those will be used for logging
* ekf2: set variable const whenever possible
* ekf2: create PreFlightChecker class that handle all the innovation
pre-flight checks.
Add simple unit testing
Use bitmask instead of general flag to have more granularity
* PreFlightChecker: use setter for the innovations to check instead of sending booleans in the update function
This makes it more scalable as more checks will be added
* ekf: Use booleans instead of bitmask for ekf preflt checks
Rename "down" to "vert"
clearance. This is the best estimate as we should not rely on a distance
sensor while on the ground. This also helps when the drone is carried
over as it avoids starting with a crazy downward distance for optical
flow scaling.
PX4 BuildBot