diff options
Diffstat (limited to 'src/lib/ecl/attitude_fw')
| -rw-r--r-- | src/lib/ecl/attitude_fw/ecl_pitch_controller.cpp | 149 | ||||
| -rw-r--r-- | src/lib/ecl/attitude_fw/ecl_pitch_controller.h | 115 | ||||
| -rw-r--r-- | src/lib/ecl/attitude_fw/ecl_roll_controller.cpp | 129 | ||||
| -rw-r--r-- | src/lib/ecl/attitude_fw/ecl_roll_controller.h | 108 | ||||
| -rw-r--r-- | src/lib/ecl/attitude_fw/ecl_yaw_controller.cpp | 75 | ||||
| -rw-r--r-- | src/lib/ecl/attitude_fw/ecl_yaw_controller.h | 89 |
6 files changed, 665 insertions, 0 deletions
diff --git a/src/lib/ecl/attitude_fw/ecl_pitch_controller.cpp b/src/lib/ecl/attitude_fw/ecl_pitch_controller.cpp new file mode 100644 index 000000000..2eb58abd6 --- /dev/null +++ b/src/lib/ecl/attitude_fw/ecl_pitch_controller.cpp @@ -0,0 +1,149 @@ +/**************************************************************************** + * + * Copyright (c) 2013 Estimation and Control Library (ECL). All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name ECL nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/** + * @file ecl_pitch_controller.cpp + * Implementation of a simple orthogonal pitch PID controller. + * + * Authors and acknowledgements in header. + */ + +#include "ecl_pitch_controller.h" +#include <math.h> +#include <stdint.h> +#include <float.h> +#include <geo/geo.h> +#include <ecl/ecl.h> +#include <mathlib/mathlib.h> + +ECL_PitchController::ECL_PitchController() : + _last_run(0), + _last_output(0.0f), + _integrator(0.0f), + _rate_error(0.0f), + _rate_setpoint(0.0f), + _max_deflection_rad(math::radians(45.0f)) +{ +} + +float ECL_PitchController::control(float pitch_setpoint, float pitch, float pitch_rate, float roll, float scaler, + bool lock_integrator, float airspeed_min, float airspeed_max, float airspeed) +{ + /* get the usual dt estimate */ + uint64_t dt_micros = ecl_elapsed_time(&_last_run); + _last_run = ecl_absolute_time(); + float dt = (float)dt_micros * 1e-6f; + + /* lock integral for long intervals */ + if (dt_micros > 500000) + lock_integrator = true; + + float k_roll_ff = math::max((_k_p - _k_i * _tc) * _tc - _k_d, 0.0f); + float k_i_rate = _k_i * _tc; + + /* input conditioning */ + if (!isfinite(airspeed)) { + /* airspeed is NaN, +- INF or not available, pick center of band */ + airspeed = 0.5f * (airspeed_min + airspeed_max); + } else if (airspeed < airspeed_min) { + airspeed = airspeed_min; + } + + /* flying inverted (wings upside down) ? */ + bool inverted = false; + + /* roll is used as feedforward term and inverted flight needs to be considered */ + if (fabsf(roll) < math::radians(90.0f)) { + /* not inverted, but numerically still potentially close to infinity */ + roll = math::constrain(roll, math::radians(-80.0f), math::radians(80.0f)); + } else { + /* inverted flight, constrain on the two extremes of -pi..+pi to avoid infinity */ + + /* note: the ranges are extended by 10 deg here to avoid numeric resolution effects */ + if (roll > 0.0f) { + /* right hemisphere */ + roll = math::constrain(roll, math::radians(100.0f), math::radians(180.0f)); + } else { + /* left hemisphere */ + roll = math::constrain(roll, math::radians(-100.0f), math::radians(-180.0f)); + } + } + + /* calculate the offset in the rate resulting from rolling */ + float turn_offset = fabsf((CONSTANTS_ONE_G / airspeed) * + tanf(roll) * sinf(roll)) * _roll_ff; + if (inverted) + turn_offset = -turn_offset; + + float pitch_error = pitch_setpoint - pitch; + /* rate setpoint from current error and time constant */ + _rate_setpoint = pitch_error / _tc; + + /* add turn offset */ + _rate_setpoint += turn_offset; + + _rate_error = _rate_setpoint - pitch_rate; + + float ilimit_scaled = _integrator_max * scaler; + + if (!lock_integrator && k_i_rate > 0.0f && airspeed > 0.5f * airspeed_min) { + + float id = _rate_error * k_i_rate * dt * scaler; + + /* + * anti-windup: do not allow integrator to increase into the + * wrong direction if actuator is at limit + */ + if (_last_output < -_max_deflection_rad) { + /* only allow motion to center: increase value */ + id = math::max(id, 0.0f); + } else if (_last_output > _max_deflection_rad) { + /* only allow motion to center: decrease value */ + id = math::min(id, 0.0f); + } + + _integrator += id; + } + + /* integrator limit */ + _integrator = math::constrain(_integrator, -ilimit_scaled, ilimit_scaled); + /* store non-limited output */ + _last_output = ((_rate_error * _k_d * scaler) + _integrator + (_rate_setpoint * k_roll_ff)) * scaler; + + return math::constrain(_last_output, -_max_deflection_rad, _max_deflection_rad); +} + +void ECL_PitchController::reset_integrator() +{ + _integrator = 0.0f; +} diff --git a/src/lib/ecl/attitude_fw/ecl_pitch_controller.h b/src/lib/ecl/attitude_fw/ecl_pitch_controller.h new file mode 100644 index 000000000..1e6cec6a1 --- /dev/null +++ b/src/lib/ecl/attitude_fw/ecl_pitch_controller.h @@ -0,0 +1,115 @@ +/**************************************************************************** + * + * Copyright (c) 2013 Estimation and Control Library (ECL). All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name ECL nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/** + * @file ecl_pitch_controller.h + * Definition of a simple orthogonal pitch PID controller. + * + * @author Lorenz Meier <lm@inf.ethz.ch> + * + * Acknowledgements: + * + * The control design is based on a design + * by Paul Riseborough and Andrew Tridgell, 2013, + * which in turn is based on initial work of + * Jonathan Challinger, 2012. + */ + +#ifndef ECL_PITCH_CONTROLLER_H +#define ECL_PITCH_CONTROLLER_H + +#include <stdbool.h> +#include <stdint.h> + +class __EXPORT ECL_PitchController +{ +public: + ECL_PitchController(); + + float control(float pitch_setpoint, float pitch, float pitch_rate, float roll, float scaler = 1.0f, + bool lock_integrator = false, float airspeed_min = 0.0f, float airspeed_max = 0.0f, float airspeed = (0.0f / 0.0f)); + + void reset_integrator(); + + void set_time_constant(float time_constant) { + _tc = time_constant; + } + void set_k_p(float k_p) { + _k_p = k_p; + } + void set_k_i(float k_i) { + _k_i = k_i; + } + void set_k_d(float k_d) { + _k_d = k_d; + } + void set_integrator_max(float max) { + _integrator_max = max; + } + void set_max_rate_pos(float max_rate_pos) { + _max_rate_pos = max_rate_pos; + } + void set_max_rate_neg(float max_rate_neg) { + _max_rate_neg = max_rate_neg; + } + void set_roll_ff(float roll_ff) { + _roll_ff = roll_ff; + } + + float get_rate_error() { + return _rate_error; + } + + float get_desired_rate() { + return _rate_setpoint; + } + +private: + + uint64_t _last_run; + float _tc; + float _k_p; + float _k_i; + float _k_d; + float _integrator_max; + float _max_rate_pos; + float _max_rate_neg; + float _roll_ff; + float _last_output; + float _integrator; + float _rate_error; + float _rate_setpoint; + float _max_deflection_rad; +}; + +#endif // ECL_PITCH_CONTROLLER_H diff --git a/src/lib/ecl/attitude_fw/ecl_roll_controller.cpp b/src/lib/ecl/attitude_fw/ecl_roll_controller.cpp new file mode 100644 index 000000000..0b1ffa7a4 --- /dev/null +++ b/src/lib/ecl/attitude_fw/ecl_roll_controller.cpp @@ -0,0 +1,129 @@ +/**************************************************************************** + * + * Copyright (c) 2013 Estimation and Control Library (ECL). All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name ECL nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/** + * @file ecl_roll_controller.cpp + * Implementation of a simple orthogonal roll PID controller. + * + * Authors and acknowledgements in header. + */ + +#include "../ecl.h" +#include "ecl_roll_controller.h" +#include <stdint.h> +#include <float.h> +#include <geo/geo.h> +#include <ecl/ecl.h> +#include <mathlib/mathlib.h> + +ECL_RollController::ECL_RollController() : + _last_run(0), + _tc(0.1f), + _last_output(0.0f), + _integrator(0.0f), + _rate_error(0.0f), + _rate_setpoint(0.0f), + _max_deflection_rad(math::radians(45.0f)) +{ + +} + +float ECL_RollController::control(float roll_setpoint, float roll, float roll_rate, + float scaler, bool lock_integrator, float airspeed_min, float airspeed_max, float airspeed) +{ + /* get the usual dt estimate */ + uint64_t dt_micros = ecl_elapsed_time(&_last_run); + _last_run = ecl_absolute_time(); + float dt = (float)dt_micros * 1e-6f; + + /* lock integral for long intervals */ + if (dt_micros > 500000) + lock_integrator = true; + + float k_ff = math::max((_k_p - _k_i * _tc) * _tc - _k_d, 0.0f); + float k_i_rate = _k_i * _tc; + + /* input conditioning */ + if (!isfinite(airspeed)) { + /* airspeed is NaN, +- INF or not available, pick center of band */ + airspeed = 0.5f * (airspeed_min + airspeed_max); + } else if (airspeed < airspeed_min) { + airspeed = airspeed_min; + } + + float roll_error = roll_setpoint - roll; + _rate_setpoint = roll_error / _tc; + + /* limit the rate */ + if (_max_rate > 0.01f) { + _rate_setpoint = (_rate_setpoint > _max_rate) ? _max_rate : _rate_setpoint; + _rate_setpoint = (_rate_setpoint < -_max_rate) ? -_max_rate : _rate_setpoint; + } + + _rate_error = _rate_setpoint - roll_rate; + + + float ilimit_scaled = _integrator_max * scaler; + + if (!lock_integrator && k_i_rate > 0.0f && airspeed > 0.5f * airspeed_min) { + + float id = _rate_error * k_i_rate * dt * scaler; + + /* + * anti-windup: do not allow integrator to increase into the + * wrong direction if actuator is at limit + */ + if (_last_output < -_max_deflection_rad) { + /* only allow motion to center: increase value */ + id = math::max(id, 0.0f); + } else if (_last_output > _max_deflection_rad) { + /* only allow motion to center: decrease value */ + id = math::min(id, 0.0f); + } + + _integrator += id; + } + + /* integrator limit */ + _integrator = math::constrain(_integrator, -ilimit_scaled, ilimit_scaled); + /* store non-limited output */ + _last_output = ((_rate_error * _k_d * scaler) + _integrator + (_rate_setpoint * k_ff)) * scaler; + + return math::constrain(_last_output, -_max_deflection_rad, _max_deflection_rad); +} + +void ECL_RollController::reset_integrator() +{ + _integrator = 0.0f; +} + diff --git a/src/lib/ecl/attitude_fw/ecl_roll_controller.h b/src/lib/ecl/attitude_fw/ecl_roll_controller.h new file mode 100644 index 000000000..0d4ea9333 --- /dev/null +++ b/src/lib/ecl/attitude_fw/ecl_roll_controller.h @@ -0,0 +1,108 @@ +/**************************************************************************** + * + * Copyright (c) 2013 Estimation and Control Library (ECL). All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name ECL nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/** + * @file ecl_roll_controller.h + * Definition of a simple orthogonal roll PID controller. + * + * @author Lorenz Meier <lm@inf.ethz.ch> + * + * Acknowledgements: + * + * The control design is based on a design + * by Paul Riseborough and Andrew Tridgell, 2013, + * which in turn is based on initial work of + * Jonathan Challinger, 2012. + */ + +#ifndef ECL_ROLL_CONTROLLER_H +#define ECL_ROLL_CONTROLLER_H + +#include <stdbool.h> +#include <stdint.h> + +class __EXPORT ECL_RollController +{ +public: + ECL_RollController(); + + float control(float roll_setpoint, float roll, float roll_rate, + float scaler = 1.0f, bool lock_integrator = false, float airspeed_min = 0.0f, float airspeed_max = 0.0f, float airspeed = (0.0f / 0.0f)); + + void reset_integrator(); + + void set_time_constant(float time_constant) { + if (time_constant > 0.1f && time_constant < 3.0f) { + _tc = time_constant; + } + } + void set_k_p(float k_p) { + _k_p = k_p; + } + void set_k_i(float k_i) { + _k_i = k_i; + } + void set_k_d(float k_d) { + _k_d = k_d; + } + void set_integrator_max(float max) { + _integrator_max = max; + } + void set_max_rate(float max_rate) { + _max_rate = max_rate; + } + + float get_rate_error() { + return _rate_error; + } + + float get_desired_rate() { + return _rate_setpoint; + } + +private: + uint64_t _last_run; + float _tc; + float _k_p; + float _k_i; + float _k_d; + float _integrator_max; + float _max_rate; + float _last_output; + float _integrator; + float _rate_error; + float _rate_setpoint; + float _max_deflection_rad; +}; + +#endif // ECL_ROLL_CONTROLLER_H diff --git a/src/lib/ecl/attitude_fw/ecl_yaw_controller.cpp b/src/lib/ecl/attitude_fw/ecl_yaw_controller.cpp new file mode 100644 index 000000000..b786acf24 --- /dev/null +++ b/src/lib/ecl/attitude_fw/ecl_yaw_controller.cpp @@ -0,0 +1,75 @@ +/**************************************************************************** + * + * Copyright (c) 2013 Estimation and Control Library (ECL). All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name ECL nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/** + * @file ecl_yaw_controller.cpp + * Implementation of a simple orthogonal coordinated turn yaw PID controller. + * + * Authors and acknowledgements in header. + */ + +#include "ecl_yaw_controller.h" +#include <stdint.h> +#include <float.h> +#include <geo/geo.h> +#include <ecl/ecl.h> +#include <mathlib/mathlib.h> + +ECL_YawController::ECL_YawController() : + _last_run(0), + _last_error(0.0f), + _last_output(0.0f), + _last_rate_hp_out(0.0f), + _last_rate_hp_in(0.0f), + _k_d_last(0.0f), + _integrator(0.0f) +{ + +} + +float ECL_YawController::control(float roll, float yaw_rate, float accel_y, float scaler, bool lock_integrator, + float airspeed_min, float airspeed_max, float aspeed) +{ + /* get the usual dt estimate */ + uint64_t dt_micros = ecl_elapsed_time(&_last_run); + _last_run = ecl_absolute_time(); + + float dt = (dt_micros > 500000) ? 0.0f : dt_micros / 1000000; + + return 0.0f; +} + +void ECL_YawController::reset_integrator() +{ + _integrator = 0.0f; +} diff --git a/src/lib/ecl/attitude_fw/ecl_yaw_controller.h b/src/lib/ecl/attitude_fw/ecl_yaw_controller.h new file mode 100644 index 000000000..66b227918 --- /dev/null +++ b/src/lib/ecl/attitude_fw/ecl_yaw_controller.h @@ -0,0 +1,89 @@ +/**************************************************************************** + * + * Copyright (c) 2013 Estimation and Control Library (ECL). All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name ECL nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/** + * @file ecl_yaw_controller.h + * Definition of a simple orthogonal coordinated turn yaw PID controller. + * + */ +#ifndef ECL_YAW_CONTROLLER_H +#define ECL_YAW_CONTROLLER_H + +#include <stdbool.h> +#include <stdint.h> + +class __EXPORT ECL_YawController +{ +public: + ECL_YawController(); + + float control(float roll, float yaw_rate, float accel_y, float scaler = 1.0f, bool lock_integrator = false, + float airspeed_min = 0, float airspeed_max = 0, float aspeed = (0.0f / 0.0f)); + + void reset_integrator(); + + void set_k_side(float k_a) { + _k_side = k_a; + } + void set_k_i(float k_i) { + _k_i = k_i; + } + void set_k_d(float k_d) { + _k_d = k_d; + } + void set_k_roll_ff(float k_roll_ff) { + _k_roll_ff = k_roll_ff; + } + void set_integrator_max(float max) { + _integrator_max = max; + } + +private: + uint64_t _last_run; + + float _k_side; + float _k_i; + float _k_d; + float _k_roll_ff; + float _integrator_max; + + float _last_error; + float _last_output; + float _last_rate_hp_out; + float _last_rate_hp_in; + float _k_d_last; + float _integrator; + +}; + +#endif // ECL_YAW_CONTROLLER_H |