lot of measurements
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@ -75,3 +75,7 @@ Then, the =f= object can be used to access the filesystem on the target computer
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* ELMO
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tutorials: https://www.elmomc.com/products/application-studio/easii/easii-tutorials/
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slip-ring-test/mat/data_003.mat
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slip-ring-test/mat/data_003.mat
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slip-ring-test/mat/data_004.mat
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slip-ring-test/mat/data_004.mat
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slip-ring-test/mat/data_005.mat
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slip-ring-test/mat/data_005.mat
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slip-ring-test/mat/data_006.mat
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slip-ring-test/mat/data_006.mat
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slip-ring-test/mat/data_007.mat
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slip-ring-test/mat/data_007.mat
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slip-ring-test/mat/data_008.mat
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slip-ring-test/mat/data_008.mat
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slip-ring-test/mat/data_009.mat
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slip-ring-test/mat/data_009.mat
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slip-ring-test/mat/data_010.mat
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slip-ring-test/mat/data_010.mat
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slip-ring-test/mat/data_011.mat
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slip-ring-test/mat/data_011.mat
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slip-ring-test/mat/data_012.mat
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slip-ring-test/mat/data_012.mat
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slip-ring-test/mat/data_013.mat
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slip-ring-test/mat/data_013.mat
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62
slip-ring-test/readme.org
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62
slip-ring-test/readme.org
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@ -0,0 +1,62 @@
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* Measure of the noise of the Voltage Amplifier
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- The two inputs (differential) of the voltage amplifier are shunted with 50Ohms
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- The AC/DC option of the Voltage amplifier is on AC
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- The low pass filter is set to 1hHz
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Measure: Second Column
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meas3: Ampli OFF
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meas4: Ampli ON 20dB
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meas5: Ampli ON 40dB
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meas6: Ampli ON 60dB
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meas7: Ampli ON 80dB
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* Measure of the noise induced by the Slip-Ring
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Setup:
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- 0V is generated by the DAC of the Speedgoat
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- Using a T, one part goes to ADC
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- the other part goes to the slip-ring 2 times and then to the ADC
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- Gain of the Voltage Amplifier: 80dB, AC, 1kHz
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- Everything is OFF
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We had some diffuculties to not have a lot of noise on the measurement.
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First column: Direct measure
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Second column: Slip-ring measure
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Measurements:
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- meas8: Slip-Ring OFF
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- meas9: Slip-Ring ON
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- meas10: Slip-Ring ON and omega=6rpm
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- meas11: Slip-Ring ON and omega=60rpm
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* Measure of the noise induced by the slip ring when using a geophone
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The geophone is located at the sample location
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The two Voltage amplifiers have the following settings:
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- AC
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- 60dB
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- 1kHz
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The signal from the geophone is split into two using a T-BNC.
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On part goes directly to the voltage amplifier and then to the ADC.
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The other part goes to the slip-ring=>voltage amplifier=>ADC.
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The other two cables that go through the slip ring have 50Ohms resistors at one end, the other end is open circuit.
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First column: Direct measure
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Second column: Slip-ring measure
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- meas12: Slip-Ring OFF
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- meas13: Slip-Ring ON
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* Measure of the influence of the AC/DC option on the voltage amplifiers
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One geophone is located on the marble.
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It's signal goes to two voltage amplifiers with a gain of 60dB.
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On voltage amplifier is on the AC option, the other on the DC option.
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- meas14
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@ -1,49 +1,52 @@
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%%
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Tsim = 100; % [s]
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%%
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tg = slrt;
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%% TODO - Build this application if updated
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%%
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if tg.Connected == "Yes"
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if tg.Status == "running"
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disp('Target is Running, Stopping...');
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tg.stop;
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while tg.Status == "running"
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pause(1);
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end
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disp('Target is Stopped');
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end
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if tg.Status == "stopped"
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%% Load the application
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disp('Load the Application');
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tg.load('slip_ring_test');
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%% Run the application
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disp('Starting the Application');
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tg.start;
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pause(10);
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pause(Tsim);
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tg.stop;
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%% Load the data
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f = SimulinkRealTime.openFTP(tg);
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cd(f, 'data/slip_ring_test/');
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mget(f, 'data_001.dat', 'data');
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close(f);
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end
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end
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data = SimulinkRealTime.utils.getFileScopeData('data/data_001.dat').data;
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size(data)
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t = data(:, end);
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x1 = data(:, 1);
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x2 = data(:, 2);
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save('mat/data_002.mat', 't', 'x1', 'x2');
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%% Plot the data
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figure;
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hold on;
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plot(t, x1);
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plot(t, x2);
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hold off
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xlabel('Time [s]');
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ylabel('Voltage [V]');
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%%
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f = SimulinkRealTime.openFTP(tg);
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cd(f, 'data/slip_ring_test/');
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mget(f, 'data_001.dat', 'data');
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close(f);
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%%
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figure;
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hold on;
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plot(t, x1-x2);
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hold off
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xlabel('Time [s]');
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ylabel('Voltage [V]');
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data = SimulinkRealTime.utils.getFileScopeData('data/data_001.dat').data;
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%%
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n = 13;
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while isfile(['mat/data_', num2str(n, '%03d'), '.mat'])
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disp('File exists.');
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if input(['Are you sure you want to override the file ', 'mat/data_', ...
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num2str(n, '%03d'), '.mat', ' ? [Y/n]']) == 'Y'
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break;
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end
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n = input('What should be the measurement number?');
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end
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save(['mat/data_', num2str(n, '%03d'), '.mat'], 'data');
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@ -1,4 +1,3 @@
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Ts = 1e-3; % [s]
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%%
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% tg = slrt;
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