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Help with reading/writing an Android to Matlab G-Force program (Android Sensors)

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Andy Keane
Andy Keane 22 Apr 2017
댓글: Andy Keane 28 Apr 2017
Hello, I am currently working on a uni project but I am having a bit of a problem. I am looking for just a x co-ordinate rotational acceleration vs time and angular velocity (on the x axis, not yaw) program. I have created a drone that rotates and I want to receive the data back to matlab. Here's what I have so far. Any tips are great. For some reason the time frames that appear on the graph go to 200 (s) when I pause for 15 s.
connector on yourpassword;
m = mobiledev;
m.AccelerationSensorEnabled = 1;
m.AngularVelocitySensorEnabled = 1;
m.Logging = 1;
pause (10)
m.Logging = 0;
[a, t] = accellog(m);
x = a(:,1);
y = a(:,2);
z = a(:,3);
%plot(t, av);
% Calculate and plot magnitude acceleration
mag = sqrt(sum(x.^2 + y.^2 + z.^2, 2));
figure
plot(t, mag);
xlabel('Time (s)');
ylabel('Acceleration (m/s^2)');
disp (mag)

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Prashant Arora
Prashant Arora 27 Apr 2017
Hi Anthony,
This might be happening due to the fact that when using "accelog", MATLAB will give you data from all logs after it established a connection, and not just the last run. To start fresh each time you run a script, you can use the following command:
discardlogs(m);
Hope this helps!

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