Electromagnetics Modeling

My first contribution to the spherical control moment gyroscope actuation is the electromagnetic modeling of inductive spin drive. I derived two different models, including a bulk conductivity model and a thin shell current model of the dipole permanent magnet rotor and the surrounding coils. Below shows the simulated fields in Ansys for a dipole configuration (left) and the analytically derived field for a quadrupole configuration (right). 

Force and Torque Modeling

With the thin shell model (left), I analytically model inductive drive to generate torque depending on the surface material and validate my findings using finite element modeling simulation. For the shell bulk conductivity model (right), I analytically model a copper shell to generate torque and validate my findings using finite element modeling simulation.

Suspension

My third contribution to the spherical control moment gyroscope is magnetically levitating a permanent magnet rotor prototype. Plant modeling and controller design is shown for closed-loop suspension.