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Adaptive controller

  • US 8,139,629 B2
  • Filed: 02/28/2007
  • Issued: 03/20/2012
  • Est. Priority Date: 03/01/2006
  • Status: Active Grant
First Claim
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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.

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