关于用传递函数来写滤​波器，这方面不是很懂​，大神们有资料吗

Answer 1

[shantanu]

Hi

I see you are trying to implement a Low Pass filter with a cutoff frequency of 20Hz so the above documentation would help you with what to put in numerator and denominator while implementing.

Kindly refer to this documentation on how to implement filters using Transfer functions.

https://www.mathworks.com/help/simulink/slref/transferfcn.html

Hope that resolves your query

[饕餮王]

Thanks for your answer！I mainly don't understand how to write a transfer function for a filter, not that the transfer function itself is that difficult

[shantanu]

Could you please provide a few more details about your model or the specific implementation you have in mind?

[饕餮王]

thank you, yes, I want to use a transfer function to write a filter, but I don't know what its mathematical formula is, all I have come into contact with is RC filter, but this formula is not related to resistance R and capacitor C, I am ignorant with it.

[shantanu]

Hi,

I understand you want to use transfer function to write a filter but you are stuck in the mathematical formulation of this. Could you provide the model details/implementation?

You can have a look at these and see if it helps.

1. https://www.youtube.com/watch?v=VFt3UVw7VrE
2. Filter Designer - Design filters starting with algorithm selection - MATLAB
3. https://www.mathworks.com/help/signal/filter-design.html

[饕餮王]

wow!I get this model form here，matlab has it video on youtube but I can nou find it.You help me a lot , thanks