Delayed resonator with speed feedback – design and performance analysis

In this work a tunable torsional vibration absorption mechanism, the delayed resonator (DR) is studied. The tuning feedback used is time delayed proportional control on the angular velocity of the absorber. Dynamic analysis of the absorber and its tuning features are presented. Single- and dual-frequency resonance characteristics are introduced, both of which are achieved owing to the added delay in control. Combined system stability, for such time delayed dynamics and relevant topics of relative stability and dominant pole placement are discussed. A design tool is suggested based on the property called, the degree-of-stability. Experimental results are also presented, using a torsional vibration setup involving electric motor drives. They support the theoretical findings strongly.