49 lines
1.2 KiB
Matlab
49 lines
1.2 KiB
Matlab
%% Clear Workspace and Close figures
|
|
clear; close all; clc;
|
|
|
|
%% Intialize Laplace variable
|
|
s = zpk('s');
|
|
|
|
addpath('./mat/');
|
|
|
|
% Results
|
|
|
|
ce_results = load('cedrat_la75b_high_1_stack.mat', 't', 'V_in', 'V_out');
|
|
pi_results = load('pi_505_high.mat', 't', 'V_in', 'V_out');
|
|
|
|
Ts = 1e-4;
|
|
win = hann(ceil(0.1/Ts));
|
|
|
|
[tf_ce, f] = tfestimate(ce_results.V_in, ce_results.V_out, win, [], [], 1/Ts);
|
|
[tf_pi, ~] = tfestimate(pi_results.V_in, pi_results.V_out, win, [], [], 1/Ts);
|
|
|
|
|
|
|
|
% We remove the phase delay due to the time delay of the ADC/DAC:
|
|
|
|
angle_delay = 180/pi*angle(squeeze(freqresp(exp(-s*Ts), f, 'Hz')));
|
|
|
|
figure;
|
|
ax1 = subplot(2, 1, 1);
|
|
hold on;
|
|
plot(f, abs(tf_pi), 'DisplayName', 'PI')
|
|
plot(f, abs(tf_ce), 'DisplayName', 'Cedrat')
|
|
set(gca, 'Xscale', 'log'); set(gca, 'Yscale', 'log');
|
|
ylabel('Amplitude'); xlabel('Frequency [Hz]');
|
|
hold off;
|
|
legend('location', 'southwest');
|
|
ylim([0.1, 50]);
|
|
|
|
ax2 = subplot(2, 1, 2);
|
|
hold on;
|
|
plot(f, 180/pi*unwrap(angle(tf_pi))-angle_delay)
|
|
plot(f, 180/pi*unwrap(angle(tf_ce))-angle_delay)
|
|
set(gca, 'Xscale', 'log'); set(gca, 'Yscale', 'lin');
|
|
ylabel('Phase'); xlabel('Frequency [Hz]');
|
|
hold off;
|
|
ylim([-270, 90]);
|
|
yticks(-360:90:90)
|
|
|
|
linkaxes([ax1,ax2], 'x');
|
|
xlim([10, 5000]);
|