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Motor_v2/Robot_V2/Algorithm/DengFOC.cpp
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#include "DengFOC.h"
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#include "Can.h"
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#include "Timer.h"
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#include "adc.h"
#include "ang_sensor.h"
#include "initial.h"
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#include "pid.h"
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#include <cmath>
#include <gd32c10x.h>
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#include <stdint.h>
constexpr double PI = 3.1415926535897932384626433832795f;
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constexpr float ANGLE_FACTOR = 25.0f / 360.0f * 2.0f * 3.14159265358979323846f;
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constexpr float _1_SQRT3 = 0.57735026919f;
constexpr float _2_SQRT3 = 1.15470053838f;
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constexpr float _3PI_2 = 4.71238898038f;
constexpr u8 PP = 11;
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constexpr float DIR = 1.0;
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constexpr float sqrt3 = 1.73205080757f; // sqrt(3)的预计算值
constexpr float sqrt3dv2 = 0.86602540378f; // sqrt(3)/2的预计算值
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constexpr float zero_electric_angle = 0.0f;
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constexpr u16 LUT_SCALE = (LUT_SIZE / (2.0f * PI));
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FOC_Controlroller FOC; // FOC控制初始化
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extern sampler sampler;
extern angle_sensor KTH7823;
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extern CAN_transmiter CAN0_transmiter;
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// 初始变量及函数定义
#define _constrain(amt, low, high) \
((amt) < (low) ? (low) : ((amt) > (high) ? (high) : (amt)))
#define constrain(value, min, max, target_min, target_max) \
((value - min) / (max - min) * (target_max - target_min))
/**
* @brief 归一化角度
*
* @param angle
* @return float
*/
inline float _normalizeAngle(float angle) {
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float a = fmod(angle, 2 * PI);
// 取余运算可以用于归一化,列出特殊值例子算便知
return a >= 0 ? a : (a + 2 * PI);
}
// 通过Ia,Ib,Ic计算Iq,Id(目前仅输出Iq)
inline float FOC_Controlroller::cal_Iq_Id(float current_a, float current_b,
float current_c) {
// 计算电气角度
float angle_el = _normalizeAngle(shaft_angle * PP);
// Clarke变换 (使用三相电流)
float I_alpha = (2.0f / 3.0f) * current_a - (1.0f / 3.0f) * current_b -
(1.0f / 3.0f) * current_c;
float I_beta = _1_SQRT3 * current_b - _1_SQRT3 * current_c;
// Park变换
float sin_el, cos_el;
cos_el = cos_lut[(u16)(angle_el * LUT_SCALE) & LUT_MASK];
sin_el = sin_lut[(u16)(angle_el * LUT_SCALE) & LUT_MASK];
float I_q = I_beta * cos_el - I_alpha * sin_el;
return I_q*1000.0f; // 返回Iq值,乘以1000以转换为mA
}
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/**
* @brief 电机控制类构造函数
*
*/
FOC_Controlroller::FOC_Controlroller() { ; }
/**
* @brief 设置电机输出,使用优化的SVPWM算法
*
* @param Uq: q轴电压
* @param Ud: d轴电压
* @param angle_el: 电机轴角度
*/
inline void FOC_Controlroller::setPhaseVoltage(float Uq, float Ud) {
// 计算电气角度
float angle_el = _normalizeAngle(shaft_angle * PP);
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// 帕克逆变换 (直接计算,避免函数调用开销)
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float sin_el, cos_el;
sin_el = sin_lut[(u16)(angle_el * LUT_SCALE) & LUT_MASK];
cos_el = cos_lut[(u16)(angle_el * LUT_SCALE) & LUT_MASK];
float Ualpha = Ud * cos_el - Uq * sin_el;
float Ubeta = Ud * sin_el + Uq * cos_el;
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// 克拉克逆变换 (使用预计算常量优化)
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Ua = Ualpha + v_half;
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Ub = sqrt3dv2 * Ubeta - 0.5f * Ualpha + v_half;
Uc = -0.5f * Ualpha - sqrt3dv2 * Ubeta + v_half;
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// 计算占空比并限制范围
duty_a = _constrain(Ua / v_safe, 0.0f, 1.0f);
duty_b = _constrain(Ub / v_safe, 0.0f, 1.0f);
duty_c = _constrain(Uc / v_safe, 0.0f, 1.0f);
// 设置PWM输出
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float voltage_exchange = limit_voltage / v_safe;
duty_a = duty_a * voltage_exchange;
duty_b = duty_b * voltage_exchange;
duty_c = duty_c * voltage_exchange;
Set_3Pwm(duty_a, duty_b, duty_c);
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// std::printf("PWM:%f,%f,%f\n", dc_a, dc_b, dc_c);
}
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/**
* @brief 电机关机
*
*/
void FOC_Controlroller::shut_down() {
is_shut_down = 1;
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gpio_bit_reset(GPIOB, GPIO_PIN_12);
}
/**
* @brief 占空比置0
*
*/
void FOC_Controlroller::drv_stop() { Set_3Pwm(0.0f, 0.0f, 0.0f); }
/**
* @brief 电机锁止
*/
void FOC_Controlroller::drv_hold(float duty) {
if (duty > 0.95f) {
duty = 0.95f;
} else if (duty < 0.0f) {
duty = 0.0f;
}
Set_3Pwm(duty, duty, duty);
}
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/**
* @brief 电机恢复
*
*/
void FOC_Controlroller::resume() {
over_current = false;
voltage_error = false;
is_shut_down = false;
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gpio_bit_set(GPIOB, GPIO_PIN_12);
}
/**
* @brief 更新电源电压
*
*/
void FOC_Controlroller::update_power(void) {
voltage_power_supply = sampler.get_vbus_voltage();
if (voltage_power_supply < 36.0f and voltage_power_supply > 8.0f) {
voltage_error = false;
v_half = voltage_power_supply * 0.5f;
v_safe = voltage_power_supply * 0.95f;
} else {
voltage_error = true;
}
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}
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/**
* @brief 速度开环控制
*
* @param target_velocity: 目标速度
* @return float: q轴电压
*/
float FOC_Controlroller::velocity_open_loop() {
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// 通过时间间隔和目标速度计算需要转动的机械角度,存储在shaft_angle中,在此之前,还需要对轴角度归一化
// 预计算常量 1e-4 = 100微秒控制周期
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shaft_angle =
_normalizeAngle(shaft_angle + target_velocity * ANGLE_FACTOR * 1e-4f);
// 因为在开环控制中,Ud始终为0,只控制Uq
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const float Uq = voltage_power_supply / 2.0f;
setPhaseVoltage(Uq, 0.0f);
CAN0_transmiter.testfloat_union.f =
cal_Iq_Id(sampler.get_current('U'), sampler.get_current('V'), sampler.get_current('W'));
return limit_voltage;
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}
/**
* @brief 电机初始化
*
* @param _PP: 电机极队数
*/
// void FOC_Controlroller::DFOC_alignSensor(int _PP) {
// u8 PP = _PP;
// setPhaseVoltage(3, 0, _3PI_2);
// delay_1ms(3000);
// zero_electric_angle = _electricalAngle();
// setPhaseVoltage(0, 0, _3PI_2);
// std::printf("0电角度:%f", zero_electric_angle);
// }
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/**
* @brief 角度闭环控制
*
* @param target_angle: 目标角度
* @return float: 当前角度
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*/
float FOC_Controlroller::angle_control(float target_angle) {
// PID 控制计算
float Uq = angle_loop(target_angle - rt_angle);
// 获取电机轴角度
shaft_angle = KTH7823.getcurrent_sensorangle() * DEG2RAD;
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// 设置相电压
setPhaseVoltage(Uq, 0.0f);
return shaft_angle;
}
/**
* @brief 角度闭环控制
*
* @param target_angle: 目标角度
* @return float: 当前角度
*/
float FOC_Controlroller::angle_control_NPID(float target_angle) {
static float Kp = 20.0f;
// 控制力矩计算
float Uq = _constrain(Kp * (target_angle - rt_angle), -voltage_power_supply,
voltage_power_supply);
// 获取电机轴角度
shaft_angle = KTH7823.getcurrent_sensorangle() * DEG2RAD;
// 设置相电压
setPhaseVoltage(Uq, 0.0f);
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return shaft_angle;
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}
/**
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* @brief 速度闭环控制
*
* @param target_velocity: 目标速度
* @return float: 当前速度
*/
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float FOC_Controlroller::velocity_control(float target_velocity) {
// PID 控制计算
float Uq = vel_loop(target_velocity - rt_velocity);
// 获取电机轴角度
shaft_angle = KTH7823.getcurrent_sensorangle() * DEG2RAD;
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// 设置相电压
setPhaseVoltage(Uq, 0.0f);
CAN0_transmiter.testfloat_union.f =
cal_Iq_Id(sampler.get_current('U'), sampler.get_current('V'), sampler.get_current('W'));
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return rt_velocity;
}
float FOC_Controlroller::current_control(float target_current) {
// PID 控制计算
float Iq = cal_Iq_Id(sampler.get_current('U'), sampler.get_current('V'), sampler.get_current('W'));
float Uq = current_loop(target_current - Iq);
CAN0_transmiter.testfloat_union.f = Iq;
// 获取电机轴角度
shaft_angle = KTH7823.getcurrent_sensorangle() * DEG2RAD;
// 设置相电压
setPhaseVoltage(Uq, 0.0f);
return 1;
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}