Compass/Gyro Module about ips HOT 3 OPEN

One of the reasons the systems I have worked with use three coordinates on the ship is so that you can get both a forward and a perpendicular vector and use them to calculate a third. If you end up using the DeltaV as facing info then the system has to calculate and include ship drift. It also does not work when stationary(which I think is the more critical issue of the two.)

I do wonder if one receiver for forward and another for down would be enough. If one were to instead calculate a new coordinate off of three of the quad receivers and the one forward/down receiver, would the distance discrepancy of that single receiver(and possibly its counterpart) be enough to continue the 0.2s accuracy? I think if one had a known distance offset of the forward and down receivers it might be.

from ips.

Yea after messing with velocity calculations based on coordinates, I agree that using it is very brittle and prone to a ton of errors. Going with 3 separate points for establishing a plane on the ship is the way to go.

Unfortunately, it's impossible to calculate a third point off of 2 others regardless of the setup. If you only have 2 coordinates, then you only have a line between those 2 coordinates. Even if you know the distances to a third, that third coordinate could be anywhere in a circle around the other two. Almost like the line created by the 2 points is a hinge that the third rotates around.

But I do think it may be possible to construct the needed vectors even when the receivers are very close to each other. I would be working with very small numbers, but it may be enough. If it works, I should be able come up with a very small, single module rather than a 3-piece system.

from ips.

You could have a 2nd system that is below the main system to give you roll orientation of the ship. you could then at least orient the ship upright before attempting to find the heading/pitch of the ship with movement.

from ips.