Measured rms value through Simulink with STM32F407 is varying very slowly after changing input?

Question

muhammad saad malik 2016-3-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/276233-measured-rms-value-through-simulink-with-stm32f407-is-varying-very-slowly-after-changing-input

评论： muhammad saad malik 2018-3-12

I am using STM32F407 microcontroller with Simulink. After taking the input samples through ADC i convert it to voltage and then measure the rms value using RMS block in DSP system toolbox. I have used running rms for rms computation. I am getting the measured rms value at the LCD but when i remove the input i.e. 0V, the LCD or even LEDs do not respond instantaneously rather the value starts decreasing and gets to zero in almost minutes i.e. 4-5 min from 115V. I want help to understand what is the reason for this slow response in rms computation and is there any solution for it?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

nitish agarwal 2016-5-3

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/276233-measured-rms-value-through-simulink-with-stm32f407-is-varying-very-slowly-after-changing-input#answer_220595

Hey, I am facing the same difficulty. I am using DRMS block. If u have rectified the problem then pls let me know

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

muhammad saad malik 2016-5-18

use the rms block in dsp system toolbox with "entire input" as the selection preceded by a buffer with number of samples in one cycle as the value in first box. Leave the remaining boxes as it is.

请先登录，再进行评论。

Answer 2

Ahmet yüksel 2018-3-12

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/276233-measured-rms-value-through-simulink-with-stm32f407-is-varying-very-slowly-after-changing-input#answer_309631

Hey, I am facing the same difficulty. I am using DRMS block. If u have rectified the problem then pls let me know. how to solve this error. may you help me please

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

muhammad saad malik 2018-3-12

use the rms block in dsp system toolbox with "entire input" as the selection preceded by a buffer with number of samples in one cycle as the value in first box. Leave the remaining boxes with their default values.

请先登录，再进行评论。