1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

3D Force vector rotation

  1. Jan 9, 2008 #1


    User Avatar

    How do I manipulate (rotate) one 3D force vector so they are relative (in the same plane) as another 3D force vector please.

    First I have is a static reference vector SF that is the accelerometer stationary at some orientation. Next I rotate the accelerometer around one or more axis and take another set of stationary measurements that are the SI vector.

    What I want to do is to apply some function (rotation?) to the SI vector that will produce a new vector N that it is in alignment and proportional with the SF vector.

    N = SF ? SI
    N = SF
    Where SF is a static vector, SI is the current vector, N is a new vector

    As you will see below I have included some sample accelerometer x,y,z axis data for SF and SI vector where
    /x*x+y*y+z*z = Eg

    I have tried a very simple 2D axis subtraction method with only the Y and Z axis and this works well, but I have no idea how to do it for 3D can someone help please.

    NB The accelerometer axis output value is the sine of the force on the axis.

    Many thanks in advance


    SF= Xg = 0.020615 Yg = -0.014522 Zg = 0.999183 Eg=0.999502
    SI= Xg = 0.001649 Yg = -0.660823 Zg = 0.748382 Eg=0.998384
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted