-180 to 180 degree roll angle from memsic

avionikeren

Is it possible to get full tilt in one direction with a memsic sensor tilted 90 degrees?

And if possible, can I use the memsic propeller object in any way to do it?

virtuPIC

The Memsic sensor only senses linear acceleration. If your sensor does not accelerate in any other direction you can compute the direction for full roll. However, if you get additional acceleration in vertical direction (dropping) or is shifted to the side you will get errors.

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avionikeren

Made it work now,

Have seen this kind of sensing beeing done·with pendulum from goodrich,
they was filled up with oil so the acceleration should not make any big impact,
I`m trying to do the same·by only·letting the code travel one degree at a time...

virtuPIC

Kinda non-linear digital low pass filter... Well, if speed is still dufficient. Recently I had some discussion here with cessnapilot on rotation detection with linear sensors. But for that approach you would need two single sensors at different locations measuring centrifugal acceleration.

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Airspace V - international hangar flying!
www.airspace-v.com/ggadgets for tools & toys

avionikeren

ah, gets complicated then...

i`m going to use in a underwater robot, so the movement is very slow...

virtuPIC

Well, in this case the centrifugal forces probably are too small to measure. But I would also expect alien acceleration very small due to viscosity. At least if you won't use it near a propeller or power plant...

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Airspace V - international hangar flying!
www.airspace-v.com/ggadgets for tools & toys