ardupilot/libraries/AP_Motors/AP_MotorsHeli_Single.h

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/// @file AP_MotorsHeli_Single.h
/// @brief Motor control class for traditional heli
#pragma once
#include <AP_Common/AP_Common.h>
#include <AP_Math/AP_Math.h> // ArduPilot Mega Vector/Matrix math Library
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#include <SRV_Channel/SRV_Channel.h>
#include "AP_MotorsHeli.h"
#include "AP_MotorsHeli_RSC.h"
#include "AP_MotorsHeli_Swash.h"
#include "AP_Motors_Thrust_Linearization.h"
// rsc and extgyro function output channels.
#define AP_MOTORS_HELI_SINGLE_EXTGYRO CH_7
#define AP_MOTORS_HELI_SINGLE_TAILRSC CH_7
// tail types
#define AP_MOTORS_HELI_SINGLE_TAILTYPE_SERVO 0
#define AP_MOTORS_HELI_SINGLE_TAILTYPE_SERVO_EXTGYRO 1
#define AP_MOTORS_HELI_SINGLE_TAILTYPE_DIRECTDRIVE_VARPITCH 2
#define AP_MOTORS_HELI_SINGLE_TAILTYPE_DIRECTDRIVE_FIXEDPITCH_CW 3
#define AP_MOTORS_HELI_SINGLE_TAILTYPE_DIRECTDRIVE_FIXEDPITCH_CCW 4
#define AP_MOTORS_HELI_SINGLE_TAILTYPE_DIRECTDRIVE_VARPIT_EXT_GOV 5
// direct-drive variable pitch defaults
#define AP_MOTORS_HELI_SINGLE_DDVP_SPEED_DEFAULT 50
// default external gyro gain
#define AP_MOTORS_HELI_SINGLE_EXT_GYRO_GAIN 350
// COLYAW parameter min and max values
#define AP_MOTORS_HELI_SINGLE_COLYAW_RANGE 5.0f
// maximum number of swashplate servos
#define AP_MOTORS_HELI_SINGLE_NUM_SWASHPLATE_SERVOS 3
/// @class AP_MotorsHeli_Single
class AP_MotorsHeli_Single : public AP_MotorsHeli {
public:
// constructor
AP_MotorsHeli_Single(uint16_t speed_hz = AP_MOTORS_HELI_SPEED_DEFAULT) :
AP_MotorsHeli(speed_hz),
_tail_rotor(SRV_Channel::k_heli_tail_rsc, AP_MOTORS_HELI_SINGLE_TAILRSC),
_swashplate(AP_MOTORS_MOT_1, AP_MOTORS_MOT_2, AP_MOTORS_MOT_3, AP_MOTORS_MOT_5)
{
AP_Param::setup_object_defaults(this, var_info);
};
// set update rate to motors - a value in hertz
void set_update_rate(uint16_t speed_hz) override;
// output_to_motors - sends values out to the motors
void output_to_motors() override;
// set_desired_rotor_speed - sets target rotor speed as a number from 0 ~ 1
void set_desired_rotor_speed(float desired_speed) override;
// calculate_scalars - recalculates various scalars used
void calculate_scalars() override;
// calculate_armed_scalars - recalculates scalars that can change while armed
void calculate_armed_scalars() override;
// get_motor_mask - returns a bitmask of which outputs are being used for motors or servos (1 means being used)
// this can be used to ensure other pwm outputs (i.e. for servos) do not conflict
uint32_t get_motor_mask() override;
// ext_gyro_gain - set external gyro gain in range 0 ~ 1000
void ext_gyro_gain(float gain) override { if (gain >= 0 && gain <= 1000) { _ext_gyro_gain_std.set(gain); }}
// has_flybar - returns true if we have a mechical flybar
bool has_flybar() const override { return _flybar_mode; }
// supports_yaw_passthrought - returns true if we support yaw passthrough
bool supports_yaw_passthrough() const override { return _tail_type == AP_MOTORS_HELI_SINGLE_TAILTYPE_SERVO_EXTGYRO; }
void set_acro_tail(bool set) override { _acro_tail = set; }
// Run arming checks
bool arming_checks(size_t buflen, char *buffer) const override;
// Helper function for param conversions to be done in motors class
void heli_motors_param_conversions(void) override;
// Thrust Linearization handling
Thrust_Linearization thr_lin {*this};
// var_info
static const struct AP_Param::GroupInfo var_info[];
protected:
// init_outputs - initialise Servo/PWM ranges and endpoints
void init_outputs() override;
// update_motor_controls - sends commands to motor controllers
void update_motor_control(RotorControlState state) override;
// heli_move_actuators - moves swash plate and tail rotor
void move_actuators(float roll_out, float pitch_out, float coll_in, float yaw_out) override;
// move_yaw - moves the yaw servo
void move_yaw(float yaw_out);
// handle output limit flags and send throttle to servos lib
void output_to_ddfp_tail(float throttle);
// servo_test - move servos through full range of movement
void servo_test() override;
// external objects we depend upon
AP_MotorsHeli_RSC _tail_rotor; // tail rotor
AP_MotorsHeli_Swash _swashplate; // swashplate
// internal variables
float _oscillate_angle = 0.0f; // cyclic oscillation angle, used by servo_test function
float _servo_test_cycle_time = 0.0f; // cycle time tracker, used by servo_test function
float _collective_test = 0.0f; // over-ride for collective output, used by servo_test function
float _roll_test = 0.0f; // over-ride for roll output, used by servo_test function
float _pitch_test = 0.0f; // over-ride for pitch output, used by servo_test function
float _yaw_test = 0.0f; // over-ride for yaw output, used by servo_test function
float _servo4_out = 0.0f; // output value sent to motor
// parameters
AP_Int16 _tail_type; // Tail type used: Servo, Servo with external gyro, direct drive variable pitch or direct drive fixed pitch
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AP_Int16 _ext_gyro_gain_std; // PWM sent to external gyro on ch7 when tail type is Servo w/ ExtGyro
AP_Int16 _ext_gyro_gain_acro; // PWM sent to external gyro on ch7 when tail type is Servo w/ ExtGyro in ACRO
AP_Int8 _flybar_mode; // Flybar present or not. Affects attitude controller used during ACRO flight mode
AP_Int16 _direct_drive_tailspeed; // Direct Drive VarPitch Tail ESC speed (0 ~ 1000)
AP_Float _collective_yaw_scale; // Feed-forward compensation to automatically add rudder input when collective pitch is increased. Can be positive or negative depending on mechanics.
AP_Float _yaw_trim; // Fixed offset applied to yaw output to reduce yaw I.
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bool _acro_tail = false;
};