How to determine joint axis of operation?
How to determine joint axis of operation?
(OP)
To measure the forces on the bearings inside a MacPherson shock absorber (strut), I built a simple test model to test the behavior. In the first model I placed the strut vertically (lower and upper mounting point exactly above each other), so the axis of operation of the joints (bearings) were straightforward. R1: [1 0 0] R2: [0 1 0] R3: [0 0 1] P1: [0 0 1]
This model seems to work according to expectations. The normal forces on the bearings matched the ones determined by hand calculations.
In a second model, I placed the strut according to the real coordinates, so it will not be completely vertical, but under a small angle.
The question is now, what should be the axes of operation?
Vertical test model:
htt p://www.2s hared.com/ file/2EoCm 68I/test_s hockabsorb er_MB.html
Inclined test model (also uploaded to this forum):
ht tp://www.2 shared.com /file/Eskb ij2r/test_ shockabsor ber_MB_inc lined.html
Picture of the test model:
http ://imagesh ack.us/pho to/my-imag es/84/test model.png/
Drawing of shock absorber:
http://i mageshack. us/photo/m y-images/1 0/shockabs orber.png/
This model seems to work according to expectations. The normal forces on the bearings matched the ones determined by hand calculations.
In a second model, I placed the strut according to the real coordinates, so it will not be completely vertical, but under a small angle.
The question is now, what should be the axes of operation?
Vertical test model:
htt
Inclined test model (also uploaded to this forum):
ht
Picture of the test model:
http
Drawing of shock absorber:
http://i
RE: How to determine joint axis of operation?
RE: How to determine joint axis of operation?
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?
RE: How to determine joint axis of operation?
The world coordinate system is defined as follows, when looking to the rear view of a vehicle:
x -> inside the screen/paper
y -> horizontally to the left
z -> vertically upwards
Or isn't this what you mean?
RE: How to determine joint axis of operation?
Cheers
Greg Locock
New here? Try reading these, they might help FAQ731-376: Eng-Tips.com Forum Policies http://eng-tips.com/market.cfm?