Clear Filters
Clear Filters

How to obtain speeds in NED coordinate system from the speed and course obtained with matlabMobile from the position sensor of an Android smartphone?

11 views (last 30 days)
Thanks in advance.
I need to know the NED speeds from the sensors of a smartphone to implement them in a Kalman Filter. GPS in addition to LLA, returns a single value for speed, heading, and horizontal accuracy.
Sincerely

Answers (1)

Tushar
Tushar on 11 Sep 2023
Hi Manuel,
I understand that you need the sensor data like GPS, speed, etc. in the North-East-Down (NED) coordinate system, using MATLAB mobile. Refer to the steps listed below:
  • Check MATLAB Support Package for Android Sensors: This enables you to collect sensor data (acceleration, angular velocity, orientation, magnetic field, and GPS sensors) from your mobile Android device.
  • Try the 'Position and Motion' functions-
  • Processing the data received: The data received in 'geodic' coordinates can be transformed to 'NED' coordinates using lla2ned function.
% Data in geodic coordinates
lla0 = [46.017 7.750 1673]; lla = [45.976 7.658 4531];
% Transformed into NED coordinates
xyzNED = lla2ned(lla,lla0,"flat")
xyzNED = 1×3
1.0e+03 * -4.5572 -7.1244 -2.8580
I hope the above steps will help you collect the data in the required format. For more info, refer to the articles below:
  1. Logging Accelerometer Data - An example showing how to manipulate and visualize 'Accelerometer Data'.
  2. Process Logged Sensor Data - An example showing how to plot 'Orientation Data' acquired.
  3. Fitness Trackers using MATLAB mobile - A blog showcasing the workflow of how a group of high school students created a Fitness Tracker app.

Categories

Find more on MATLAB Mobile in Help Center and File Exchange

Products


Release

R2022b

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!