What are the bias and spatial accelerations?

Question

I'm reading this document to first understand the rotational dynamics of a spacecraft, and then to understand the Kalman filter that comes with it.

Problem is I don't know what bias and spatial accelerations are. I've googled these terms, but the hits I've recieved were not very good.

kirch,

Thanks for trying. The bias acceleration I'm talking about is not due to accelerometer bias. As far as I could tell it's acceleration due to joint motion or nonjoint motion. Spatial force has something to do with forces acting on handles. You have the joint and then joint leaf. It's confusing. I'm not familiar with these terms.

I'm familiar with centripital and coriolis acceleration and acceleration due to angular acceleration.

I'm basically reading a document about satellite motion. You have the satellite body, the momentum wheel, and two solar arrays. Each solar array joint has two degrees of freedom.

Since I last posted this question, I'm starting to understand more of it, but still don't know exactly what the bias, spatial, general acceleration terms mean.

Answer 1

A little more context would help. Bias could be attitude measuring instrument bias. Spatial could be someone's term for distinguishing translation from rotation, perhaps? Or disturbances peculiar to space such as solar wind, etc. Sorry I can't help more.