huddle test + tfestimate

This commit is contained in:
Thomas Dehaeze 2020-07-20 10:38:58 +02:00
parent bd3358db95
commit 5afe1bcdd1
6 changed files with 83 additions and 0 deletions

BIN
mat/apa95ml_5kg_10V.mat Normal file

Binary file not shown.

BIN
mat/huddle_test.mat Normal file

Binary file not shown.

BIN
matlab/piezoapa.slx Normal file

Binary file not shown.

Binary file not shown.

77
runtest.m Normal file
View File

@ -0,0 +1,77 @@
tg = slrt;
%%
f = SimulinkRealTime.openFTP(tg);
mget(f, 'apa95ml.dat', 'data');
close(f);
%% Convert the Data
data = SimulinkRealTime.utils.getFileScopeData('data/apa95ml.dat').data;
u = data(:, 1);
y = data(:, 2);
t = data(:, 3);
save('mat/apa95ml_5kg_10V.mat', 'u', 't', 'y');
%%
figure;
subplot(1,2,1);
plot(t, u)
subplot(1,2,2);
plot(t, y)
%%
load('mat/apa95ml_5kg_10V.mat', 'u', 't', 'y');
ht = load('mat/huddle_test.mat', 'u', 't', 'y');
u = u - mean(u);
y = y - mean(y);
%%
[pxx, f] = pwelch(y, win, [], [], 1/Ts);
[pht, ~] = pwelch(ht.y, win, [], [], 1/Ts);
figure;
hold on;
plot(f, pxx);
plot(f, pht);
hold off;
set(gca, 'Xscale', 'log'); set(gca, 'Yscale', 'log');
ylabel('PSD'); xlabel('Frequency [Hz]');
%%
run setup;
win = hann(ceil(10.1/Ts));
[tf_est, f] = tfestimate(u, y, win, [], [], 1/Ts);
[co_est, ~] = mscohere(u, y, win, [], [], 1/Ts);
%%
figure;
hold on;
plot(f, co_est, 'k-')
set(gca, 'Xscale', 'log'); set(gca, 'Yscale', 'lin');
ylabel('Coherence'); xlabel('Frequency [Hz]');
hold off;
%%
figure;
ax1 = subplot(2, 1, 1);
hold on;
plot(f, abs(tf_est), 'k-', 'DisplayName', 'Identified')
set(gca, 'Xscale', 'log'); set(gca, 'Yscale', 'log');
ylabel('Amplitude'); xlabel('Frequency [Hz]');
hold off;
ax2 = subplot(2, 1, 2);
hold on;
plot(f, 180/pi*unwrap(angle(-tf_est)), 'k-')
set(gca, 'Xscale', 'log'); set(gca, 'Yscale', 'lin');
ylabel('Phase'); xlabel('Frequency [Hz]');
hold off;
linkaxes([ax1,ax2], 'x');
xlim([10, 5000]);

6
setup.m Normal file
View File

@ -0,0 +1,6 @@
s = tf('s');
Ts = 1e-4;
Glpf = 1/(1 + s/2/pi/500);
Gz = c2d(Glpf, Ts, 'tustin');