In this project, we try to implement a digital control system for the quad-maglev suspension. This is motivated by the issue of cross coupling among different degrees of freedom—one sensor responds to the motion of more than one degree of freedom of the levitated plate (the plant). It is difficult to diagonalize the control matrix (from the sensor to the actuator) with the current analog feedback control system; therefore, a multiple-channel digital control system is essential, which allows us to fine tune the coefficient of the control matrix. Once the cross coupling issue is solved, we can use analog prototyping of the digital filter and try to realize stable levitation.
