Simulink中的模拟与现实之间的差异

亲爱的鲁宾，我在Simulink开发了一个获得正弦PWM的模型。我将正弦曲线的期望频率插入到常数中，这将在查找表索引中进行变换。在查找表中有正弦波的值。在Simulink中运行仿真，我得到了预期的结果：三个正弦波从120个移动到另一个正弦波。然后，如果我设置50MIPS和0.001的固定步长（配置time1）和I编程设备，我得到同样的东西。当我改变MIPS或固定步长（Time1）时，在SIMULINK中，仍然得到一个50Hz的正弦波（如预期的那样），而当我编程时，我得到一个非常低的频率：在5到7赫兹之间或多或少。PPN。在50MIPS和0.001固定步长下，我得到4Hz，如果我改变这些值，LED闪烁在非常低的频率。我不明白问题在哪里。你有什么建议吗？谢谢你。



      以下为原文

    Dear Lubin,

I have developed in Simulink the model to obtain a sinusoidal PWM. I insert in the constant the desired frequency of the sinusoid, this will be transformed in the lookup table index. In the lookup table there are the values of a sinusoid.

Running the simulation in Simulink, I obtain what expected: three sinusoids shifted of 120 degree one from the other.

Then, if I set 50MIPS and 0.001 of fixed step size (that configure Timer1) and I program the device, I obtain the same thing that I obtain in Simulink.

Whenever I change the MIPS or the fixed step size (Timer1), in Simulink I still obtain a 50Hz sinusoid (as expected), while when I program the device I obtain a very low frequency: more or less between 5 - 7 Hz.
Also, I have put an LED with 4Hz frequency and the same thing happen. With 50MIPS and 0.001 fixed step size I obtain 4Hz and if I change these values the LED blinks at a very low frequency.

I cannot understand where is the problem. Do you have suggestions?
Thank you.

Best regards,
Filippo
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