Patent ID: 8139629
Filing Date: 2012-03-20
Classification: G10K

Abstract:
1. An adaptive controller for a cyclic signal, the adaptive controller for actively reducing influences of the cyclic signal, which the cyclic signal exerts to an objective evaluation point by way of a predetermined transfer path, by adding an adaptive signal, which synchronizes with the cyclic signal, to the cyclic signal, which a vibration generation source generates, the predetermined transfer path comprising a first transfer path, and a second transfer path which differs from the first transfer path; the adaptive controller comprising: an adaptive-signal generator for generating the adaptive signal, whose constituent element comprises a first amplitude filter coefficient and a first phase filter coefficient, in the first transfer path based on an angular frequency of a specific frequency, the specific frequency being at least one frequency component selected from a plurality of frequency components making the cyclic signal; a first residual-error detector for detecting a first residual error, which results from adding the adaptive signal to the cyclic signal by way of a predetermined first transfer characteristic, at a first observation point, which is located between the adaptive-signal generator and the objective evaluation point in the first transfer path, the first residual error being added to a cyclic signal transferred by way of the second transfer path; an observation-point target-value setter for setting an amplitude target value based on the angular frequency and a transfer characteristic of the second transfer path, the amplitude target value being comprised in a cyclic residual-error target value, the amplitude target value complying with the angular frequency, the cyclic residual-error target value being a target value of the first residual error at the first observation point; and a first filter-coefficient updater for updating the first amplitude filter coefficient and the first phase filter coefficient based on the angular frequency, the first residual error and the cyclic residual-error target value.