Active damping of rotating platforms using integral force feedback

Abstract

This paper investigates the use of Integral Force Feedback (IFF) for the active damping of rotating mechanical systems. Guaranteed stability, typical benefit of IFF, is lost as soon as the system is rotating due to gyroscopic effects. To overcome this issue, two modifications of the classical IFF control scheme are proposed. The first consists of slightly modifying the control law while the second consists of adding springs in parallel with the force sensors. Conditions for stability and optimal parameters are derived. The results reveal that, despite their different implementations, both modified IFF control scheme have almost identical damping authority on suspension modes.

Torsional active-passive dampers on rotational machinery

“…For electromechanical solutions, Auleley et al (2021)] investigate several architectures of shunts mounted on a TMD. More recently, (Dehaeze and Colette, 2021) present modifications on the integral force feedback, considering inertial effects, to actively damp a rotating platform using piezoelectric stacks. The study of Hosek et al (1999) focuses on extending the action of centrifugal pendulums by forcing a delay by electromagnetic actuator, however potentially sensitive to stability problems.…”