Rubbery hinge joints

Question

I'm working on an aircraft simulation. The flight model is working pretty well, and I have movable control surfaces that use hinge joints with motors. But a problem I have is that in high speed maneuvers, the control surfaces come out of their sockets and bounce around like the hinge joint is made of rubber bands. I think this is because the forces involved are very high, on the order of 1000 kN. The torque could be as high as 300000 Nm. Is there a way to "firm up" the hinge joints so they stay true to their axes better? Thanks.

Answer 1

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 high forces and torque, And it's very stable.

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

first, I never used hinges, I tried but never achieved anything 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

Add comment · Show 4 · Share

reptilebeats · Jan 26, 2012 at 01:28 AM 0

Share

thats it perfect all i had to do was change one little physic, solver and it works perfectly fine now... shuch an easy answer for a question which has some wild ideas co$$anonymous$$g from idiots. i mean im a novice so ill try there ideas, any other things you can think of to help add more restraint would be appreciated.

i used config joints and some are set to world which helped a bit. and my solver is 100. its pretty stable now i did post a question looking for this so if you could post it there that would be great for me as reference

reptilebeats · Jan 26, 2012 at 01:32 AM 0

Share

ok been reading up on solver guna turn it down a lot i think

Phoskryfes · Jun 01, 2019 at 10:57 AM 0

Share

You are a life saver. I adjusted the iteration count of the physics settings.

BCook99 · 2 hours ago 0

Share

Thanks, good advice. I changed my fixed time step from 0.02 to 0.01 and doubled my 2D physics solver iterations and it made a huge difference!

Rubbery hinge joints

1 Reply

Your answer

Follow this Question

Related Questions