```
feat(DengFOC): 新增了基于三相电流采样的dq轴电流计算函数`cal_Iq_Id` 调整了开环控制中的电压限制逻辑 更新了默认电源电压值为24V。 KHT7823测试代码 ```
This commit is contained in:
@@ -1,23 +1,41 @@
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#include "DengFOC.h"
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#include "Filter.h"
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#include "Timer.h"
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#include "adc.h"
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#include "pid.h"
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#include "systick.h"
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#include <cmath>
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#include <cstdio>
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#include <gd32c10x.h>
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#include <stdint.h>
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constexpr double PI = 3.1415926535897932384626433832795f;
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constexpr float _1_SQRT3 = 0.57735026919f;
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constexpr float _2_SQRT3 = 1.15470053838f;
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constexpr float _3PI_2 = 4.71238898038f;
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constexpr u8 PP = 11, DIR = 1;
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constexpr float sqrt3 = 1.73205080757f; // sqrt(3)的预计算值
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constexpr float zero_electric_angle = 0.0f;
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extern sampler sampler;
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CurrentKalman curU_kalman(0.0f, 0.0026f, 4.8f, 0.0001f, 1e-6f, 0.02f);
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CurrentKalman curV_kalman(0.0f, 0.0026f, 4.8f, 0.0001f, 1e-6f, 0.02f);
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CurrentKalman curW_kalman(0.0f, 0.0026f, 4.8f, 0.0001f, 1e-6f, 0.02f);
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PIDController vel_loop_M0 = PIDController{2, 0, 0, 100000, 24.0 / 2.0};
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PIDController angle_loop_M0 = PIDController{2, 0, 0, 100000, 100};
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PIDController current_loop_M0 = PIDController{2, 0, 0, 100000, 800};
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// 初始变量及函数定义
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#define _constrain(amt, low, high) \
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((amt) < (low) ? (low) : ((amt) > (high) ? (high) : (amt)))
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#define constrain(value, min, max, target_min, target_max) \
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((value - min) / (max - min) * (target_max - target_min))
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inline float _electricalAngle(float shaft_angle) { return shaft_angle * PP; }
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inline float _electricalAngle(float shaft_angle) {
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return _normalizeAngle((float)(DIR * PP) * shaft_angle -
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zero_electric_angle);
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}
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/**
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* @brief 归一化角度
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@@ -90,7 +108,7 @@ float FOC_Controlroller::velocity_open_loop(float target_velocity) {
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angle_el = _normalizeAngle(angle_el);
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// 因为在开环控制中,Ud始终为0,只控制Uq
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const float Uq = limit_voltage;
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const float Uq = voltage_power_supply / 2.0f;
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const float Ud = 0.0f;
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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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@@ -106,9 +124,9 @@ float FOC_Controlroller::velocity_open_loop(float target_velocity) {
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Uc = (-Ualpha - sqrt3 * Ubeta) * 0.5f + v_half;
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// 计算占空比
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Ua = constrain(Ua, 0.0f, voltage_power_supply, 0.0f, limit_voltage);
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Ub = constrain(Ub, 0.0f, voltage_power_supply, 0.0f, limit_voltage);
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Uc = constrain(Uc, 0.0f, voltage_power_supply, 0.0f, limit_voltage);
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Ua = constrain(Ua, 0.0f, voltage_power_supply, 0.0f, limit_voltage * 2);
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Ub = constrain(Ub, 0.0f, voltage_power_supply, 0.0f, limit_voltage * 2);
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Uc = constrain(Uc, 0.0f, voltage_power_supply, 0.0f, limit_voltage * 2);
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const float dc_a = _constrain(Ua / voltage_power_supply, 0.0f, 1.0f);
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const float dc_b = _constrain(Ub / voltage_power_supply, 0.0f, 1.0f);
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const float dc_c = _constrain(Uc / voltage_power_supply, 0.0f, 1.0f);
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@@ -141,4 +159,60 @@ void FOC_Controlroller::shut_down() {
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void FOC_Controlroller::resume() {
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is_shut_down = 0;
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gpio_bit_set(GPIOB, GPIO_PIN_12);
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}
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}
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// 通过Ia,Ib,Ic计算Iq,Id(目前仅输出Iq)
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float cal_Iq_Id(float current_a, float current_b, float angle_el) {
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float I_alpha = current_a;
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float I_beta = _1_SQRT3 * current_a + _2_SQRT3 * current_b;
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float ct = cos(angle_el);
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float st = sin(angle_el);
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// float I_d = I_alpha * ct + I_beta * st;
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float I_q = I_beta * ct - I_alpha * st;
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return I_q;
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}
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void FOC_Controlroller::setTorque(float Uq, float angle_el) {
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Uq =
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_constrain(Uq, -(voltage_power_supply) / 2, (voltage_power_supply) / 2);
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float Ud = 0;
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angle_el = _normalizeAngle(angle_el);
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// 帕克逆变换
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Ualpha = -Uq * sin(angle_el);
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Ubeta = Uq * cos(angle_el);
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// 克拉克逆变换
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Ua = Ualpha + voltage_power_supply / 2;
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Ub = (sqrt(3) * Ubeta - Ualpha) / 2 + voltage_power_supply / 2;
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Uc = (-Ualpha - sqrt(3) * Ubeta) / 2 + voltage_power_supply / 2;
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driver_output(Ua, Ub, Uc);
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}
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float FOC_Controlroller::DFOC_M0_Current() {
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// 使用卡尔曼滤波后的三相电流计算Iq
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float Iu_filtered = curU_kalman.update(sampler.get_current('U'), Ua);
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float Iv_filtered = curV_kalman.update(sampler.get_current('V'), Ub);
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float Iw_filtered = curW_kalman.update(sampler.get_current('W'), Uc);
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// 根据基尔霍夫电流定律验证三相电流总和是否接近0
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// float current_sum = Iu_filtered + Iv_filtered + Iw_filtered;
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// 用三相滤波后的电流计算Iq(通过Clarke和Park变换)
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// 方法1: 使用U和V相计算
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float I_q_M0_ori =
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cal_Iq_Id(Iu_filtered, Iv_filtered, _electricalAngle(shaft_angle));
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// 方法2: 也可以使用其他两相的组合计算,然后取平均值以提高精度
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// float I_q_UW = cal_Iq_Id(Iu_filtered, Iw_filtered,
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// _electricalAngle(shaft_angle)); float I_q_VW = cal_Iq_Id(Iv_filtered,
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// Iw_filtered, _electricalAngle(shaft_angle)); float I_q_M0_ori = (I_q_UV +
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// I_q_UW + I_q_VW) / 3.0f;
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return I_q_M0_ori;
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// return 0;
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}
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void FOC_Controlroller::DFOC_M0_setTorque(float Target) // 电流力矩环
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{
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// setTorque(current_loop_M0(Target-DFOC_M0_Current()),_electricalAngle());
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}
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