Adaptive controller
First Claim
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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Abstract
An adaptive controller includes an adaptive-signal generator for generating an adaptive signal, which includes a first amplitude filter coefficient and a first phase filter coefficient, in a first transfer path based on an angular frequency of a cyclic signal, which a vibration generation source generates; a first residual-error detector for detecting a first residual error at a first observation point in the first transfer path; an observation-point target-value setter for setting a residual-error target value, which includes an amplitude target value complying with the angular frequency; 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 residual-error target value. Thus, when adding the adaptive signal to the cyclic signal, the adaptive controller can make the residual error, which results from the addition, not equal to zero intentionally.
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Citations
9 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification