Device for damping oscillations

摘要

This invention relates to devices for damping oscillations in electromechanical and automatic control systems comprising actuators, various drives and flexible members providing mechanical coupling between the actuators and drive motors. In the general case the hereinproposed device furnishes a corrective signal being in phase opposition with respect to the a-c component of the signal taken from a moment or force transducer. This signal is applied to the input of the controlled drive, thereby damping mechanical oscillations. The device, according to the invention, may comprise several channels, each channel having such series-connected components as a fundamental-frequency sine-wave signal generation unit, a differentiating unit, a net time lag tuning unit, and an amplitude tuning unit. The number of channels corresponds to the number of discriminated fundamental frequencies, the input of each channel being connected to a signal frequency separation unit coupled to the moment or force transducer, while the output of each channel is connected to the input of a unit adding up signals of all channels, said signal adder unit being connected to the input of the controlled drive.