2018-12-12 17:55:52 -04:00
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/*
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/*
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support for autotune of multirotors. Based on original autotune code from ArduCopter, written by Leonard Hall
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Converted to a library by Andrew Tridgell
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*/
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#pragma once
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2023-12-07 20:03:15 -04:00
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#include "AC_AutoTune_config.h"
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#if AC_AUTOTUNE_ENABLED
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2020-10-19 23:51:05 -03:00
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#include <AC_AttitudeControl/AC_AttitudeControl.h>
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2018-12-12 17:55:52 -04:00
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#include <AC_AttitudeControl/AC_PosControl.h>
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#include <AP_Math/AP_Math.h>
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#include "AC_AutoTune_FreqResp.h"
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#define AUTOTUNE_AXIS_BITMASK_ROLL 1
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#define AUTOTUNE_AXIS_BITMASK_PITCH 2
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#define AUTOTUNE_AXIS_BITMASK_YAW 4
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#define AUTOTUNE_AXIS_BITMASK_YAW_D 8
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#define AUTOTUNE_SUCCESS_COUNT 4 // The number of successful iterations we need to freeze at current gains
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// Auto Tune message ids for ground station
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#define AUTOTUNE_MESSAGE_STARTED 0
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#define AUTOTUNE_MESSAGE_STOPPED 1
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#define AUTOTUNE_MESSAGE_SUCCESS 2
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#define AUTOTUNE_MESSAGE_FAILED 3
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#define AUTOTUNE_MESSAGE_SAVED_GAINS 4
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#define AUTOTUNE_MESSAGE_TESTING 5
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#define AUTOTUNE_ANNOUNCE_INTERVAL_MS 2000
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class AC_AutoTune
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{
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public:
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// constructor
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AC_AutoTune();
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// main run loop
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virtual void run();
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// save gained, called on disarm
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virtual void save_tuning_gains() = 0;
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// stop tune, reverting gains
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void stop();
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2019-05-01 09:15:56 -03:00
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// reset Autotune so that gains are not saved again and autotune can be run again.
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void reset() {
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mode = UNINITIALISED;
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axes_completed = 0;
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}
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2018-12-12 17:55:52 -04:00
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protected:
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// axis that can be tuned
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enum AxisType {
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ROLL = 0, // roll axis is being tuned (either angle or rate)
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PITCH = 1, // pitch axis is being tuned (either angle or rate)
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YAW = 2, // yaw axis is being tuned using FLTE (either angle or rate)
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YAW_D = 3, // yaw axis is being tuned using D (either angle or rate)
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};
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//
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// methods that must be supplied by the vehicle specific subclass
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//
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virtual bool init(void) = 0;
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2021-01-17 22:28:20 -04:00
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// get pilot input for desired climb rate
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virtual float get_pilot_desired_climb_rate_cms(void) const = 0;
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// get pilot input for designed roll and pitch, and yaw rate
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2019-02-28 07:08:39 -04:00
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virtual void get_pilot_desired_rp_yrate_cd(float &roll_cd, float &pitch_cd, float &yaw_rate_cds) = 0;
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// init pos controller Z velocity and accel limits
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virtual void init_z_limits() = 0;
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2023-07-13 21:58:04 -03:00
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#if HAL_LOGGING_ENABLED
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// log PIDs at full rate for during twitch
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virtual void log_pids() = 0;
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#endif
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2021-12-22 10:45:38 -04:00
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//
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// methods to load and save gains
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//
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2021-12-22 10:45:38 -04:00
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// backup original gains and prepare for start of tuning
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virtual void backup_gains_and_initialise();
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2021-12-22 10:45:38 -04:00
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// switch to use original gains
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virtual void load_orig_gains() = 0;
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2021-12-22 10:45:38 -04:00
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// switch to gains found by last successful autotune
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virtual void load_tuned_gains() = 0;
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// load gains used between tests. called during testing mode's update-gains step to set gains ahead of return-to-level step
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virtual void load_intra_test_gains() = 0;
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// load gains for next test. relies on axis variable being set
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virtual void load_test_gains() = 0;
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2021-12-22 23:37:31 -04:00
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// reset the test vaariables for each vehicle
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virtual void reset_vehicle_test_variables() = 0;
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2022-01-07 14:37:02 -04:00
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// reset the update gain variables for each vehicle
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virtual void reset_update_gain_variables() = 0;
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2021-12-09 23:42:02 -04:00
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// test initialization and run methods that should be overridden for each vehicle
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virtual void test_init() = 0;
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virtual void test_run(AxisType test_axis, const float dir_sign) = 0;
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// return true if user has enabled autotune for roll, pitch or yaw axis
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bool roll_enabled() const;
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bool pitch_enabled() const;
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bool yaw_enabled() const;
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bool yaw_d_enabled() const;
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// update gains for the rate p up tune type
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virtual void updating_rate_p_up_all(AxisType test_axis)=0;
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// update gains for the rate d up tune type
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virtual void updating_rate_d_up_all(AxisType test_axis)=0;
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// update gains for the rate d down tune type
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virtual void updating_rate_d_down_all(AxisType test_axis)=0;
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// update gains for the angle p up tune type
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virtual void updating_angle_p_up_all(AxisType test_axis)=0;
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// update gains for the angle p down tune type
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virtual void updating_angle_p_down_all(AxisType test_axis)=0;
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2021-12-27 00:53:50 -04:00
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// set gains post tune for the tune type
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virtual void set_gains_post_tune(AxisType test_axis)=0;
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2021-01-18 00:16:08 -04:00
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// reverse direction for twitch test
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virtual bool twitch_reverse_direction() = 0;
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2023-07-13 21:58:04 -03:00
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#if HAL_LOGGING_ENABLED
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virtual void Log_AutoTune() = 0;
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virtual void Log_AutoTuneDetails() = 0;
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virtual void Log_AutoTuneSweep() = 0;
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#endif
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2021-12-13 23:26:57 -04:00
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// internal init function, should be called from init()
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bool init_internals(bool use_poshold,
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AC_AttitudeControl *attitude_control,
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AC_PosControl *pos_control,
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AP_AHRS_View *ahrs_view,
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AP_InertialNav *inertial_nav);
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2023-10-11 04:41:49 -03:00
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// send intermittent updates to user on status of tune
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virtual void do_gcs_announcements() = 0;
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2022-01-07 14:37:02 -04:00
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// send post test updates to user
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virtual void do_post_test_gcs_announcements() = 0;
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2021-01-17 22:28:20 -04:00
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// send message with high level status (e.g. Started, Stopped)
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void update_gcs(uint8_t message_id) const;
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// send lower level step status (e.g. Pilot overrides Active)
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void send_step_string();
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// convert tune type to string for reporting
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const char *type_string() const;
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2022-02-03 17:24:23 -04:00
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// return current axis string
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const char *axis_string() const;
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2022-02-04 19:29:23 -04:00
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// report final gains for a given axis to GCS
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virtual void report_final_gains(AxisType test_axis) const = 0;
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2021-12-13 23:26:57 -04:00
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// Functions added for heli autotune
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2021-12-13 23:26:57 -04:00
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// Add additional updating gain functions specific to heli
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// generic method used by subclasses to update gains for the rate ff up tune type
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virtual void updating_rate_ff_up_all(AxisType test_axis)=0;
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2021-12-13 23:26:57 -04:00
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// generic method used by subclasses to update gains for the max gain tune type
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virtual void updating_max_gains_all(AxisType test_axis)=0;
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// steps performed while in the tuning mode
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enum StepType {
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WAITING_FOR_LEVEL = 0, // autotune is waiting for vehicle to return to level before beginning the next twitch
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TESTING = 1, // autotune has begun a test and is watching the resulting vehicle movement
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UPDATE_GAINS = 2 // autotune has completed a test and is updating the gains based on the results
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};
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// mini steps performed while in Tuning mode, Testing step
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enum TuneType {
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RD_UP = 0, // rate D is being tuned up
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RD_DOWN = 1, // rate D is being tuned down
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RP_UP = 2, // rate P is being tuned up
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2021-12-22 23:37:31 -04:00
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RFF_UP = 3, // rate FF is being tuned up
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2024-02-23 10:24:17 -04:00
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SP_DOWN = 4, // angle P is being tuned down
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SP_UP = 5, // angle P is being tuned up
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MAX_GAINS = 6, // max allowable stable gains are determined
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2022-05-08 00:28:50 -03:00
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TUNE_CHECK = 7, // frequency sweep with tuned gains
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TUNE_COMPLETE = 8 // Reached end of tuning
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};
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TuneType tune_seq[6]; // holds sequence of tune_types to be performed
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uint8_t tune_seq_curr; // current tune sequence step
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2018-12-12 17:55:52 -04:00
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2021-12-25 23:43:10 -04:00
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// get the next tune type
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void next_tune_type(TuneType &curr_tune_type, bool reset);
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// Sets customizable tune sequence for the vehicle
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virtual void set_tune_sequence() = 0;
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2021-12-27 00:53:50 -04:00
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// get_axis_bitmask accessor
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virtual uint8_t get_axis_bitmask() const = 0;
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2021-01-18 00:16:08 -04:00
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2021-12-28 00:23:19 -04:00
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// get_testing_step_timeout_ms accessor
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virtual uint32_t get_testing_step_timeout_ms() const = 0;
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2022-01-21 14:44:36 -04:00
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// get attitude for slow position hold in autotune mode
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void get_poshold_attitude(float &roll_cd, float &pitch_cd, float &yaw_cd);
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// type of gains to load
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enum GainType {
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GAIN_ORIGINAL = 0,
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GAIN_TEST = 1,
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GAIN_INTRA_TEST = 2,
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GAIN_TUNED = 3,
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};
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void load_gains(enum GainType gain_type);
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2022-04-10 00:17:28 -03:00
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// autotune modes (high level states)
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enum TuneMode {
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UNINITIALISED = 0, // autotune has never been run
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TUNING = 1, // autotune is testing gains
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SUCCESS = 2, // tuning has completed, user is flight testing the new gains
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FAILED = 3, // tuning has failed, user is flying on original gains
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};
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TuneMode mode; // see TuneMode for what modes are allowed
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2021-12-13 23:26:57 -04:00
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// copies of object pointers to make code a bit clearer
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AC_AttitudeControl *attitude_control;
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AC_PosControl *pos_control;
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AP_AHRS_View *ahrs_view;
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AP_InertialNav *inertial_nav;
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AP_Motors *motors;
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2018-12-21 21:53:39 -04:00
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2021-01-17 22:28:20 -04:00
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AxisType axis; // current axis being tuned. see AxisType enum
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2021-09-26 22:18:04 -03:00
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bool positive_direction; // false = tuning in negative direction (i.e. left for roll), true = positive direction (i.e. right for roll)
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StepType step; // see StepType for what steps are performed
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TuneType tune_type; // see TuneType
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bool ignore_next; // true = ignore the next test
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bool twitch_first_iter; // true on first iteration of a twitch (used to signal we must step the attitude or rate target)
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uint8_t axes_completed; // bitmask of completed axes
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float test_rate_min; // the minimum angular rate achieved during TESTING_RATE step-multi only
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float test_rate_max; // the maximum angular rate achieved during TESTING_RATE step-multi only
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float test_angle_min; // the minimum angle achieved during TESTING_ANGLE step-multi only
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float test_angle_max; // the maximum angle achieved during TESTING_ANGLE step-multi only
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2018-12-20 09:57:30 -04:00
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uint32_t step_start_time_ms; // start time of current tuning step (used for timeout checks)
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uint32_t step_time_limit_ms; // time limit of current autotune process
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2024-02-18 23:46:37 -04:00
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uint32_t level_start_time_ms; // start time of waiting for level
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int8_t counter; // counter for tuning gains
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float target_rate; // target rate-multi only
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float target_angle; // target angle-multi only
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float start_rate; // start rate - parent and multi
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float start_angle; // start angle
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float rate_max; // maximum rate variable - parent and multi
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float test_accel_max; // maximum acceleration variable
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float step_scaler; // scaler to reduce maximum target step - parent and multi
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2024-02-29 02:42:39 -04:00
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float angle_finish; // Angle that test is aborted- parent and multi
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2021-12-13 23:26:57 -04:00
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float desired_yaw_cd; // yaw heading during tune - parent and Tradheli
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2018-12-12 17:55:52 -04:00
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LowPassFilterFloat rotation_rate_filt; // filtered rotation rate in radians/second
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// backup of currently being tuned parameter values
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2024-05-09 08:33:57 -03:00
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float orig_roll_rp, orig_roll_ri, orig_roll_rd, orig_roll_rff, orig_roll_dff, orig_roll_fltt, orig_roll_smax, orig_roll_sp, orig_roll_accel;
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float orig_pitch_rp, orig_pitch_ri, orig_pitch_rd, orig_pitch_rff, orig_pitch_dff, orig_pitch_fltt, orig_pitch_smax, orig_pitch_sp, orig_pitch_accel;
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float orig_yaw_rp, orig_yaw_ri, orig_yaw_rd, orig_yaw_rff, orig_yaw_dff, orig_yaw_fltt, orig_yaw_smax, orig_yaw_rLPF, orig_yaw_sp, orig_yaw_accel;
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2018-12-12 17:55:52 -04:00
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bool orig_bf_feedforward;
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// currently being tuned parameter values
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float tune_roll_rp, tune_roll_rd, tune_roll_sp, tune_roll_accel;
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float tune_pitch_rp, tune_pitch_rd, tune_pitch_sp, tune_pitch_accel;
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float tune_yaw_rp, tune_yaw_rLPF, tune_yaw_sp, tune_yaw_accel;
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2020-10-19 23:51:05 -03:00
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float tune_roll_rff, tune_pitch_rff, tune_yaw_rd, tune_yaw_rff;
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2018-12-12 17:55:52 -04:00
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uint32_t announce_time;
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float lean_angle;
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float rotation_rate;
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2019-02-28 07:08:39 -04:00
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float roll_cd, pitch_cd;
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2018-12-12 17:55:52 -04:00
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2021-12-13 23:26:57 -04:00
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// heli specific variables
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uint8_t freq_cnt; // dwell test iteration counter
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2024-06-24 01:13:16 -03:00
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float start_freq; // start freq for dwell test
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float stop_freq; // ending freq for dwell test
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2021-12-13 23:26:57 -04:00
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bool ff_up_first_iter; // true on first iteration of ff up testing
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private:
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// return true if we have a good position estimate
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virtual bool position_ok();
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2024-02-29 02:42:39 -04:00
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// methods subclasses must implement to specify max/min test angles:
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virtual float target_angle_max_rp_cd() const = 0;
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// methods subclasses must implement to specify max/min test angles:
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virtual float target_angle_max_y_cd() const = 0;
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// methods subclasses must implement to specify max/min test angles:
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virtual float target_angle_min_rp_cd() const = 0;
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// methods subclasses must implement to specify max/min test angles:
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virtual float target_angle_min_y_cd() const = 0;
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// methods subclasses must implement to specify max/min test angles:
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virtual float angle_lim_max_rp_cd() const = 0;
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// methods subclasses must implement to specify max/min test angles:
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virtual float angle_lim_neg_rpy_cd() const = 0;
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2021-12-13 23:26:57 -04:00
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// initialise position controller
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bool init_position_controller();
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// main state machine to level vehicle, perform a test and update gains
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// directly updates attitude controller with targets
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void control_attitude();
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// returns true if vehicle is close to level
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bool currently_level();
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bool pilot_override; // true = pilot is overriding controls so we suspend tuning temporarily
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bool use_poshold; // true = enable position hold
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bool have_position; // true = start_position is value
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Vector3f start_position; // target when holding position as an offset from EKF origin in cm in NEU frame
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// variables
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uint32_t override_time; // the last time the pilot overrode the controls
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2021-12-09 23:42:02 -04:00
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// time in ms of last pilot override warning
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2019-02-28 07:44:22 -04:00
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uint32_t last_pilot_override_warning;
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2018-12-12 17:55:52 -04:00
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};
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2023-12-07 20:03:15 -04:00
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#endif // AC_AUTOTUNE_ENABLED
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