Saturday, July 12, 2014

classical mechanics - Lagrangian of the Euler equations



Do the Euler equations (where I1,I2,I3 are principal moments of inertia):


I1˙ω1+(I3I2)ω2ω3=M1

I2˙ω2+(I1I3)ω3ω1=M2
I3˙ω3+(I2I1)ω1ω2=M3


in their above general form have a Lagrangian? If not, does a specific case of ω1=ω2=0 (and so M1=M2=0) have a general Lagrangian? (M3 is the torque coming from a central gravitational potential - a planet - keeping the body (a satellite) on an elliptic orbit.)




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