Hello again,
I do know about the Kalman filter although it is not the one that I am going to use.
I am getting the motion artefact from hand/arm vibration in the three dimensions (x,y,z). The filter that I will apply is the LMS (least mean square algorithm).
One way is to use a 1-axis accelerometer to capture the motion (but I know how I can apply this since it is only one input) and the other way is to use all three axes (x,y,z) signals.
Now, I can have 3 separated outputs - one for each dimension - or to combine the three input accelerometer signals to have only one input for the LMS adaptive filter.
My problem is how can I combine those three signals to have only 1 input that will represent successfully the acceleration in all three directions.
Thank you all for responding