fix(FOC): 修复SVPWM相电压计算中的角度单位转换错误
SVPWM相电压计算中,arm_sin_cos_f32函数期望接收度数而非弧度, 需要将local_angle乘以RAD2DEG进行单位转换。 同时修正了开环速度控制中的电压计算公式, 将固定电压改为基于目标速度的约束电压, 并调整了电机控制频率配置。
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@@ -204,9 +204,9 @@ inline void FOC_Controller::setSVPWM_PhaseVoltage(float Uq, float Ud) {
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magnitude = voltage_power_supply * limit_percent;
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}
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// 使用arm_sin_cos_f32计算local_angle的sin和cos
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// local_angle 是弧度,arm_sin_cos_f32 期望度数,需转换
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float sin_l, cos_l;
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arm_sin_cos_f32(local_angle, &sin_l, &cos_l);
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arm_sin_cos_f32(local_angle * RAD2DEG, &sin_l, &cos_l);
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float T1 = modulation_index * (SQRT3DV2 * cos_l - COS_PI_3 * sin_l);
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float T2 = modulation_index * sin_l;
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float T0 = 1.0f - T1 - T2;
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@@ -410,17 +410,18 @@ void FOC_Controller::fast_voltage_check(void) {
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*/
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float FOC_Controller::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
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shaft_angle = fmod(shaft_angle + target_velocity * REDUCTION_RATIO * 1.0 /
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MOTOR_FREQUENCY / 2,
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shaft_angle = fmod(shaft_angle + target_velocity * REDUCTION_RATIO/
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MOTOR_FREQUENCY,
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360.0f);
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// 获取电机轴角度
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float shaft_angle = KTH7823.getcurrent_sensorangle();
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// float shaft_angle = KTH7823.getcurrent_sensorangle();
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CAN0_transmiter.testfloat_union.f = shaft_angle;
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rt_current = cal_Iq_Id(sampler.get_current('U'), sampler.get_current('V'),
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sampler.get_current('W'));
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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 = voltage_power_supply / 2.0f;
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const float Uq = _constrain(target_velocity * REDUCTION_RATIO * 0.005f,
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2.0f, voltage_power_supply * 0.5f);
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setSVPWM_PhaseVoltage(Uq, 0.0f);
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return limit_voltage;
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}
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