Control of Phase Shift in Two-Rotor Vibration Units

This brief is devoted to the experimental study of possibilities for control of the phase shift between two vibration actuators. The control laws for frequency stabilization simultaneously with the prescribed phase shift between the rotors angular positions are proposed and experimentally studied by means of the mechatronic vibration test bed. It is obtained that for the low and medium frequencies, the self-synchronization of unbalanced rotors does not prevent achieving the desired phase shift between the rotors. For a high-frequency band, the Huygens self-synchronization of rotors manifests itself, narrowing the range of the achievable phase shift. The obtained experimental results are in agreement with the simulation results obtained from the 7-DOF mathematical model. Especially important is an agreement in the vibrational field observed from simulation and experiment. The qualitative coincidence of such complex motions means both the validation of the model and the verification of the measurement and experiment methodology.