Frequency domain and time-frequency domain for sae data

% clear window

clc;

clear all;

% import xls or csv file

axial_Depth_1 = readtable('E:Variable axial cutting depth\1');

% fz: feed per tooth= 0.03 ; n: spindle speed= 1200; ap: axial cutting depth=1; ae: radial cutting depth=3.0

% extract data in respective sensors sensors

Cutting_force1= axial_Depth_1 (:,1:4);

% set sampling frequency for each sensor data

fz_force= 600;

L= 27900; % Total sample data points

%Timestamp for each sensor data signal based on sampling rate

%Ts_force= (0:L-1)*1/fz % To create time span data based on frequency

Ts_force= (0:L-1)*1/fz_force;

Ts_force= Ts_force'; % To transform rows into colomn

% Add Ts_force to Cutting force table

Cutting_force1 = addvars(Cutting_force1,Ts_force,'After','Torsion_Z');

Cutting_force1= head(Cutting_force1,27900);

%Plot cutting force data with respect to time (time-series data)

%Plot 1 Axial cutting force Vs. Time

figure(5);

%subplot (1,2,1)

plot(Cutting_force1.Ts_force,Cutting_force1.Axial_force, 'b');

title('Cutting forces for Variable Depath of cut (ap=1)'); grid on

xlabel('Time (Ts force)')

ylabel('Axial force in N')

I have done this much part till time domain graph. Please help me out to plot frequency domain graph and time- frequency domain graph.

Thanks in advance.

[Sameer Sayyad]

Thanks Sir @Star Strider

[Star Strider]

As always, my pleasdure!

Answer 1

[Star Strider]

The pspectrum function can likely help with this, specifically with respect to the time-frequency plot.

[Sameer Sayyad]

Can you please elaborate the same by using codes. As, I am in learning stage of MATLAB. Thanking you in advance.

[Star Strider]

I cannot run your code, so specifically in that context. The pspectrum documentation has a number of examples on how to use the function to calculate Fourier transforms and time-frequency plots and matrices.

[Sameer Sayyad]

ok thanks

[Star Strider]

My pleasure!