How to plot trajectories of a project when knowing the acceleration and time

I am currently working on a project which is to plot the trajectory of an accelerometer sensor.

The data gathered from the sensor is in the format of Json. I do not even know how to read that Json file, however, what I do know is that the sensor collects acceleration in x, y, z directions respectively, and the sample rate is 10Hz.

We can simply assume the initial velocity is 0, and the object is positioned at the point (0,0,0) initially.

Answer 1

[Pratyush Swain]

Hey Hailong,

I understand you want to read sensor values from json file and then use the sensor's data to calculate trajectories.Please follow the following steps to resolve the task:

1-Please refer to https://www.mathworks.com/matlabcentral/answers/474980-extract-info-from-json-file-by-matlab for reading json file.

2-You can refer to 'cumtrapz' function which computes the approximate cumulative integrals that will help to velocity and then position.For more information please refer to https://www.mathworks.com/help/matlab/ref/cumtrapz.html

3-After obtaining the position values,'plot' function can be leveraged to visualize the trajectory.For more information, please refer to https://www.mathworks.com/help/matlab/ref/plot.html

Hope this helps.