stability derivatives

pinguinovikingo · May 31, 2011

Hi everyone.

I'm working in a recreational proyect. I have used a CFD (Tornado) to calculate the stability derivatives of a small aircraft.

The point is, the CFD software provides me the stability derivatives in wind-axis (stability-axis) but I need them in body axis. do you know they way (or expression) to convert to those axes?

for example I want Cxu but I have Cxalpha and Cxbetha... How I get Cxu from Cxalpha and Cxbetha??? (and the others components Cxv Cxw Cxq Cxp Cxr Cyu... Czu... Clu... Cmu... Cnu...Cnr)

thank you

GregLocock · May 31, 2011

http://mathworld.wolfram.com/Transformation.html

you are interested in rotational transformations.

They are easy to derive if one axis of the three is parallel in the two coordinate systems.

Cheers

Greg Locock

New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

GregLocock · May 31, 2011

http://mathworld.wolfram.com/RotationMatrix.html

is more directly relevant.

Cheers

Greg Locock

New here? Try reading these, they might help FAQ731-376

http://eng-tips.com/market.cfm?

Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

stability derivatives

pinguinovikingo

Industrial

GregLocock

Automotive

GregLocock

Automotive

Similar threads

Part and Inventory Search

Sponsor