REPETITIVE PHENOMENA CANCELLATION ARRANGEMENT WITH MULTIPLE SENSORS AND ACTUATORS

摘要

Repetitive phenomena cancelling controller arrangement for cancelling unwantedrepetitive phenomena comprising knownfundamental frequencies. The known frequencies are determined and anelectrical known frequency signal corresponding to theknown fundamental frequencies of the unwanted repetition phenomena isgenerated. A plurality of sensors (S l...S n) are employedin which each sensor senses residual phenomena and generates an electricalresidual phenomena signal representative ofthe residual phenomena. A plurality of actuators (A l...A n) are provided forcancelling phenomena signals at a plurality oflocations, and a controller is utilized for automatically controlling each ofthe actuators as a predetermined function of theknown fundamental frequencies of the unwanted repetitive phenomena and of theresidual phenomena signals from the pluralityof sensors. In this arrangement the plurality of actuators operate toselectively cancel discrete harmonics of the knownfundamental frequencies while accommodating interactions between the varioussensors and actuators: