Changes include:
New low-level get_throttle_accel function takes target acceleration and compares vs earth-frame Z accelerometer values to produce output to motors.
Higher level throttle controllers modified to call new get_throttle_accel controller
Throttle_rate_stabilized controller added which maintains a desired climb/descent rate
Throttle_land controller added - descends using normal auto throttle controller to 10m then descends at 50cm/s
Multiple throttle modes added including landing mode
Land flight mode no longer needs GPS
Throttle cruise maintenance moved to update_throttle_cruise function
removed unused waypoint_radius var
removed slow_wp
updated speed management system to maintain a constant acceleration or deceleration of 1m/s
changed version to 2.8.1a
Also fixed a small bug in the get_stabilize_pitch function in which it was using the roll (instead of pitch) to decide whether it should let the i term build-up or not.
upped nav max to 32deg from 30
renamed calc_desired_speed to get_desired_speed
Added get_desired_climb_rate function to do smooth transitions in altitude
modified get_altitude_error to override the older altitude manager.
pre-calculated airspeed resistance pitches copter automatically to gain a certain speed allowing the speed controller to work off of a better set point - similar to Alt hold.
added param tilt_comp with a default of 54 which equals 19.5° of pitch to go 6m/s
upped Z and Y target speeds to int32_t for speed squared calculation
I added inertial navigation based on the simulator data. This is an option only available if you compile with Arduino and set
#define INERTIAL_NAV ENABLED
in the APM_Config.h file.
This has been tested for one real flight and did not crash my quad, but consider it very alpha. The quad may be unpredictable at first until the error correction fixes poorly calibrated accels. Be Careful.
Most of the real work is in the inertia file, but the error correction, new variable defines and calibration calls are sprinkled throughout.
The Log should record RAW messages with special debugging values.
shrank speed filter to avoid latency
removed unused forward estimator code
placed code for switchover to gps.groundspeed at 1.5m/s
added clamp for D term when below .5m/s to eliminate noise
added hybrid I-term based on speed error and position
changes Loiter D term to use position rather than acceleration to avoid noise
rmackay9
Robert Lefebvre
Andrew Tridgell
Jason Short
uncrustify
Adam M Rivera