1. An apparatus for actively controlling vibratory noise, comprising:
reference signal generating means for outputting, as reference signals, a reference sine wave signal and a reference cosine wave signal having a frequency based on the frequency of vibration from a vibratory noise source;
a first adaptive notch filter for outputting a first control signal based on said reference cosine wave signal and a second adaptive notch filter for outputting a second control signal based on said reference sine wave signal in order to cancel generated vibratory noise which is generated based on the vibration from said vibratory noise source;
vibratory noise canceling means for inputting a sum signal representing the sum of said first control signal and said second control signal, and outputting canceling vibratory noise to cancel the generated vibratory noise;
error signal detecting means for outputting an error signal based on the difference between said generated vibratory noise and the canceling vibratory noise output from said vibratory noise canceling means;
correcting means for correcting said reference cosine wave signal and said reference sine wave signal based on corrective values corresponding to signal transfer characteristics from said vibratory noise canceling means to said error signal detecting means with respect to the frequencies of said reference signals, and outputting the corrected reference cosine wave signal and the corrected reference sine wave signal respectively as first and second reference signals; and
filter coefficient updating means for sequentially updating filter coefficients of said first adaptive notch filter and said second adaptive notch filter to minimize said error signal based on said error signal and said first and second reference signals;
wherein said correcting means outputs, as said first reference signal, a signal produced by subtracting the product of a sine corrective value based on the sine value of the phase characteristics of the signal transfer characteristics and said reference sine wave signal from the product of a cosine corrective value based on the cosine value of the phase characteristics of the signal transfer characteristics and said reference cosine wave signal, and outputs, as said second reference signal, a signal produced by adding the product of said sine corrective value and said reference cosine wave signal and the product of said cosine corrective value and said reference sine wave signal to each other; and
wherein said filter coefficient updating means successively updates the filter coefficients of said first adaptive notch filter based on said first reference signal and said error signal and successively updates the filter coefficients of said second adaptive notch filter based on said second reference signal and said error signal.
2. An apparatus according to claim 1, wherein said cosine corrective value and said sine corrective value are stored in advance in a storage device in association with the frequencies of said reference signals, and are read therefrom in association with the frequencies of said reference signals.
3. An apparatus according to claim 2, wherein a measurement gain of a predetermined frequency in the signal transfer characteristics is corrected at a predetermined value, and said cosine corrective value and said sine corrective value which are stored in said storage device with respect to reference signals having the same frequency comprise values determined based on the corrected gain and measured phase characteristics.
4. A vehicle incorporating an apparatus for actively controlling vibratory noise according to claim 1.
5. A method of actively controlling vibratory noise, comprising the steps of:
outputting, as reference signals, a reference sine wave signal and a reference cosine wave signal having a frequency based on the frequency of vibration from a vibratory noise source;
outputting a first control signal with a first adaptive notch filter based on said reference cosine wave signal and outputting a second control signal with a second adaptive notch filter based on said reference sine wave signal in order to cancel generated vibratory noise which is generated based on the vibration from said vibratory noise source;
inputting a sum signal representing the sum of said first control signal and said second control signal to a vibratory noise canceling means, and outputting canceling vibratory noise to cancel the generated vibratory noise from said vibratory noise canceling means;
outputting an error signal from an error signal detecting means based on the difference between said generated vibratory noise and the canceling vibratory noise output from said vibratory noise canceling means;
correcting said reference cosine wave signal and said reference sine wave signal based on corrective values corresponding to signal transfer characteristics from said vibratory noise canceling means to said error signal detecting means with respect to the frequencies of said reference signals, and outputting the corrected reference cosine wave signal and the corrected reference sine wave signal respectively as first and second reference signals; and
sequentially updating filter coefficients of said first adaptive notch filter and said second adaptive notch filter to minimize said error signal based on said error signal and said first and second reference signals;
wherein said correcting step outputs, as said first reference signal, a signal produced by subtracting the product of a sine corrective value based on the sine value of the phase characteristics of the signal transfer characteristics and said reference sine wave signal from the product of a cosine corrective value based on the cosine value of the phase characteristics of the signal transfer characteristics and said reference cosine wave signal, and outputs, as said second reference signal, a signal produced by adding the product of said sine corrective value and said reference cosine wave signal and the product of said cosine corrective value and said reference sine wave signal to each other; and
wherein said updating step successively updates the filter coefficients of said first adaptive notch filter based on said first reference signal and said error signal and successively updates the filter coefficients of said second adaptive notch filter based on said second reference signal and said error signal.
6. A method according to claim 5, wherein said cosine corrective value and said sine corrective value are stored in advance in a storage device in association with the frequencies of said reference signals, and are read therefrom in association with the frequencies of said reference signals.
7. A method according to claim 6, wherein a measurement gain of a predetermined frequency in the signal transfer characteristics is corrected at a predetermined value, and said cosine corrective value and said sine corrective value which are stored in said storage device with respect to reference signals having the same frequency comprise values determined based on the corrected gain and measured phase characteristics.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method for controlling a driving blade (6, 7) with respect to the wind direction, in particular in a wind or water engine with an axis perpendicular to the wind direction, characterized in that in consecutive cycles of rotation of a frame (1) of the engine, the driving blade (6, 7) connected via a distribution (R) with a vane (30, 38) is set in a working cycle or in an idle cycle according to direction of its movement with respect to the wind direction, wherein the full rotation of the driving blade (6, 7) around its axis takes two rotations of the frame of the engine.
2. The method according to claim 1, characterized in that the distribution mechanism (R) is controlled by the vane (30, 38).
3. The method according to claim 2, characterized in that the distribution mechanism (R) divides the rotation of the driving blade (6, 7) with respect to the vane (30, 38) to alternating cycles, the working cycle and the idle cycle.
4. The method according to claim 1, characterized in that the frame (1) of the engine rotates around an axis (2) which coincides with the axis (2) of rotation of the distribution mechanism (R).
5. The method according to claim 1, characterized in that in the working cycle the axis (4, 5) of rotation of the driving blade (6, 7) is locked still with the axis (2) of rotation of the frame (1) of the engine.
6. The method according to claim 1, characterized in that in the idle cycle the axis (4, 5) of rotation of the driving blade (6, 7) and the axis (14) of rotation of the vane (30, 38) are locked still.
7. A wind engine with an axis perpendicular to the wind direction with a driving blade (6, 7) controlled with respect to the wind direction, characterized in that on a rotatable frame (1) there is mounted the driving blade (6, 7) connected via a distribution mechanism (R) with a vane (30, 38), wherein the distribution mechanism (R) is arranged to set the driving blade (6, 7) to a working mode or to an idle mode, depending on the direction of movement of the driving blade (6, 7) with respect to the wind direction.
8. The wind engine according to claim 7, characterized in that the vane (30, 38) is configured to control the distribution mechanism (R).
9. The wind engine according to claim 7, characterized in that the axis of rotation of the frame (1) of the engine and the axis of rotation of the distribution (R) coincide.
10. The wind engine according to claim 7, characterized in that the axis of rotation of the vane (30, 38) and the axis of rotation of the distribution (R) coincide.
11. The wind engine according to claim 7, characterized in that the distribution mechanism (R) is configured to divide the rotation of the driving blade (6, 7) to alternating modes, the working mode and the idle mode, with respect to the vane (30, 38).
12. The wind engine according to claim 7, characterized in that the distribution mechanism (R), in order to set the driving blade (6, 7) into the working mode, is configured to lock still the axis (4, 5) of rotation of the driving blade (6, 7) and the axis (2) of rotation of the frame (1) of the engine.
13. The wind engine according to claim 7, characterized in that the distribution mechanism (R), in order to set the driving blade (6, 7) into the idle mode, is configured to lock still the axis (4, 5) of rotation of the driving blade (6, 7) and the axis (14) of rotation of the vane (30, 38).
14. The wind engine according to claim 7, characterized in that the distribution mechanism (R) comprises a mechanical cam (27).
15. The wind engine according to claim 7, characterized in that the distribution mechanism (R) comprises an electric relay (32).