Research project: Compensation filters for feedback control units with proof-mass electrodynamic actuators
Proof-mass electrodynamic-actuator and accelerometer-sensor pairs with time integrator and fixed gain controller are an effective way to implement velocity feedback control, where stability limits arise as a result of the actuator fundamental resonance. In contrast to previous studies, in this project the response of such a control unit is discussed in terms of its open and closed-circuit base impedance, which can be expressed as the sum of passive and active frequency response functions, where the active part depends on both the actuator dynamics and the response of the analogue controller. It is demonstrated that the control stability could be enhanced by implementing an appropriate control compensator.