feat(FOC): 优化开环速度控制逻辑并提升性能
refactor(ADC): 重构采样逻辑并封装为 sampler 类 refactor(CAN): 更新 CAN 发送器以使用新的sampler 接口 refactor(timer): 调整定时器中断结构并优化任务调度
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@@ -8,13 +8,15 @@
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constexpr double PI = 3.1415926535897932384626433832795f;
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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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// 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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float _electricalAngle(float shaft_angle) { return shaft_angle * PP; }
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inline float _electricalAngle(float shaft_angle) { return shaft_angle * PP; }
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/**
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* @brief 归一化角度
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@@ -22,7 +24,7 @@ float _electricalAngle(float shaft_angle) { return shaft_angle * PP; }
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* @param angle
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* @return float
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*/
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float _normalizeAngle(float angle) {
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inline float _normalizeAngle(float angle) {
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float a = fmod(angle, 2 * PI);
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// 取余运算可以用于归一化,列出特殊值例子算便知
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return a >= 0 ? a : (a + 2 * PI);
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@@ -78,18 +80,37 @@ void FOC_Controlroller::setPhaseVoltage(float Uq, float Ud, float angle_el) {
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* @return float: q轴电压
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*/
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float FOC_Controlroller::velocity_open_loop(float target_velocity) {
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now_us = get_system_runtime_us();
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float dt = (now_us - last_time_us) * 1e-6f;
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// 限制时间间隔
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if (dt <= 0.0f || dt > 0.5f)
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dt = 1e-3f;
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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
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shaft_angle = _normalizeAngle(shaft_angle + target_velocity * dt);
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// 预计算常量 1e-4 = 100微秒控制周期 / 1秒 = 100e-6
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shaft_angle = _normalizeAngle(shaft_angle + target_velocity * 1e-4f);
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// 直接计算电气角度,避免函数调用开销
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float angle_el = shaft_angle * PP + zero_electric_angle;
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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 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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const float sin_el = sin(angle_el);
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const float cos_el = cos(angle_el);
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Ualpha = -Uq * sin_el;
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Ubeta = Uq * cos_el;
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float uq = limit_voltage; // 设定一个固定的q轴电压
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setPhaseVoltage(uq, 0, _electricalAngle(shaft_angle));
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last_time_us = now_us;
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return uq;
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// 克拉克逆变换 (预计算常量值)
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const float v_half = voltage_power_supply * 0.5f; // 电源电压的一半
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Ua = Ualpha + v_half;
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Ub = (sqrt3 * Ubeta - Ualpha) * 0.5f + v_half;
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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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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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Set_3Pwm(dc_a, dc_b, dc_c);
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return limit_voltage;
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}
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/**
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