MATLAB: Chirp Signal Block in MATLAB

chirpsystem identification

Hi,

I would like to ask whether it is possible to adjust the magnitude of the chirp signal or not? Because the default amplitude of the chirp signal block is 1 volt, and I would like to get the chirp signal magnitude of 5V-6V. How can I adjust it?? Or csn I put a gain block of 5 after the chirp signal block?

Please advice, thank you very much.

Regards

Best Answer

Yes, since there is no amplitude parameter, you can simply place a Gain block after it to achieve the desired frequency.

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MATLAB: How to filtrate recorded time acceleration signal with 4th order Butterworth low pass filter ?

If you sampled the signal at 200Hz it is useless adopt a low-passfilter at 100Hz since 100Hz is already the maximum bandwidth that you get, see Nyqyust frequency for more detauls. For antialiasing purpose you MUST use analogic filters, not digital filters. So I did not get the reason why you want to filter the signal at 100Hz.

Anyhow, this could be a possible solution.

Fs = 200;     % Sampling frequency in Hz
 
fcutlow = 20;     % low cut frequency in Hz
Order = 4;
 
[b,a] = butter(Order,fcutlow/(Fs/2));   % Get filter coeff of butter filter
 
Filt_filt_signal = filtfilt(b,a, rawSignal ); % zero phase delay low-pass filtering

As usual, if that helps you, please consider to accept the answer.

Thanks and best regards, A

MATLAB: XPC target toolbox

Though you have to use a single block, you can enter a vector of numbers in the "channels" parameter of the block mask that chooses channels for you, as indicated in the documentation.

The choice of whether you can use one block or many is often dictated by the hardware; I don't know for sure, but I would guess the hardware requires accessing some registers common to all channels, which makes splitting code up into different modules difficult.

Best Answer

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MATLAB: How to filtrate recorded time acceleration signal with 4th order Butterworth low pass filter ?

MATLAB: XPC target toolbox

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