Problems with angles

I'm working on a hypersonic vehicle project and in this project it is required that I know the inclination angle at any point on the curve of the vehicle. I found the inclination angles of the curve but for one aspect of this project I need to delete the angles that are greater than the maximum inclination angle (90 degrees). As seen on the pic, [link=http://www.mediafire.com/i/?thaq7m7gpp4zbfz][/link] , I need to keep the angles that are from the green line to the red line and from the green line to the blue line. I've tried using a find indice command to find the indices that correspond to angles that -90<theta<0 but I then realized that this would delete the angles that are negative between the blue and red lines. The signs of the angles are as follows:

right side of blue line: negative
left side of blue line to right above green line: positive
green line to left of red line: negative
right of red line: positive

So as you can see, finding a condition that works is making this hard for me. I've included an excel file with the angles so that you may see how the signs change.

Close up of top:
[link=http://www.mediafire.com/i/?smfpyoap86r1i3f][/link]

Close up of bottom:
[link=http://www.mediafire.com/i/?1duul76s4zje1k6][/link]

Comments

  • I am working on similar project but i want to find angle at any point on the curve road (highways). Can you please guide me how you have completed this task. Any help will be appreciated.

    Regards,
    Mrinal
  • I've decided to approach this problem using 3D geometry. If I take the dot product of the each of the normals of the facets to the velocity vector, I can see which facets are to be ignored by using these indices as logical indices.
  • I've decided to approach this problem using 3D geometry. If I take the dot product of the each of the normals of the facets to the velocity vector, I can see which facets are to be ignored by using these indices as logical indices.
Sign In or Register to comment.

Howdy, Stranger!

It looks like you're new here. If you want to get involved, click one of these buttons!

Categories

In this Discussion