Bäumer, RichardRichardBäumerStarossek, UweUweStarossek2020-01-172020-01-172017-02-22Journal of Vibration and Acoustics, Transactions of the ASME 2 (139): 021017 - (2017)http://hdl.handle.net/11420/4399In previous research, the twin rotor damper (TRD), an active mass damper, was presented including control algorithms for monofrequent vibrations. In a preferred mode of operation, the continuous rotation mode, two eccentric masses rotate in opposite directions about two parallel axes with a mostly constant angular velocity. The resulting control force is harmonic. Within this paper, the steady-state response of a single-degree-of-freedom (SDOF) oscillator subjected to a harmonic excitation force with and without the TRD is studied. A closed-form solution is presented and validated experimentally. It is shown that the TRD provides damping to the SDOF oscillator until a certain frequency ratio is reached. The provided damping is not only dependent on the design parameters of the TRD but also depends on the steady-state vibration amplitude. The solution serves as a powerful design tool for dimensioning the TRD. The analytical closed-form solution is applicable for other active mass dampers.en1528-892720172American Society of Mechanical Engineers (ASME)centrifugal forcesingle-degree-of-freedom oscillatoractive dampingtwin rotor damperharmonic excitation forceexact analytical solutionsamplitude-frequencyPhysikJournal Article10.1115/1.4035134Other