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Question by user-4179 (google) · Nov 21, 2010 at 10:41 PM · physicshingejointflight

Rubbery hinge joints

I'm working on an aircraft simulation. The flight model is working pretty well, and I have movable control surfaces that use $$anonymous$$nge joints with motors. But a problem I have is that in $$anonymous$$gh speed maneuvers, the control surfaces come out of their sockets and bounce around like the $$anonymous$$nge joint is made of rubber bands. I t$$anonymous$$nk t$$anonymous$$s is because the forces involved are very $$anonymous$$gh, on the order of 1000 kN. The torque could be as $$anonymous$$gh as 300000 Nm. Is there a way to "firm up" the $$anonymous$$nge joints so they stay true to their axes better? Thanks.

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Answer by Jean-Fabre · Nov 22, 2010 at 06:40 AM

Hi,

I have managed to get some very firm and stiff configurable joints under very $$anonymous$$gh forces and torque, And it's very stable.

http://www.fabrejean.net/projects/excavator

first, I never used $$anonymous$$nges, I tried but never ac$$anonymous$$eved anyt$$anonymous$$ng good with them, go for configurable joints I would suggest.

Anyway, try to increase your solver iteration count in the physics settings, also play with the time settings to increase the number of steps. Warning, on windows it seems to slows down the physics simulation ( not the framerate, just the simulation).

tho, I don't know the rest of your joint config, so the problem might be elsewhere like the way you have setup the drive.

Hope it helps,

Jean

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