Active vibration reducing control apparatus and method applicable to vehicular active engine mount
First Claim
1. An adaptive control apparatus comprising:
- a vibration source;
a control vibration source which is enabled to develop a control vibration to be interfered against a vibration developed form the vibration source;
a reference signal generator for detecting a vibration developed condition of the vibration source and outputting the vibration developed condition indicative signal as a reference signal;
a residual vibration detector for detecting a residual vibration signal after the interference of the control vibration against the vibration;
an active vibration controller for driving the control vibration source so as to reduce the vibration using a control algorithm including a transfer function between the control vibration source and the residual vibration detector based on the reference signal and the residual vibration signal;
an identification signal supplier for supplying each of identification signals in sinusoidal waveforms to the control vibration source;
a response signal reader for reading the residual vibration signal when the control vibration according to each of the identification signals is developed form the control vibration source in synchronization with a sampling clock;
a transfer function identifier for identifying the transfer function based on the residual vibration signal read by the response signal reader; and
a frequency selector for selecting the one by one frequencies of the identification signals in the sinusoidal waveforms, the frequency selector selecting the frequencies of the respective identification signals in the sinusoidal waveforms so that a frequency interval between mutually adjacent selected frequencies in particular frequency band is shorter than that in any other frequency bands.
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Accused Products
Abstract
In apparatus and method for actively reducing a vibration developed from a vibration source applicable to a vehicular active engine mount, an identification signal supplier is provided for previously supplying each of identification signals in sinusoidal waveforms to a control vibration source, a response signal reader is provided for reading a residual vibration signal when a control vibration according to each of the identification signals is developed from the control vibration source, a transfer function identifier is provided for identifying the transfer function on the basis of the residual vibration signal read by the response signal reader; and a frequency selector for selecting one by one frequencies of the identification signals in the sinusoidal waveforms, the frequency selector selecting the frequencies of the respective identification signals in the sinusoidal waveforms so that a frequency interval between mutually adjacent selected frequencies in a particular frequency band is shorter than that in any other frequency bands. In addition, a phase lag providing block and/or a gain characteristic corrector is provided.
36 Citations
21 Claims
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1. An adaptive control apparatus comprising:
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a vibration source;
a control vibration source which is enabled to develop a control vibration to be interfered against a vibration developed form the vibration source;
a reference signal generator for detecting a vibration developed condition of the vibration source and outputting the vibration developed condition indicative signal as a reference signal;
a residual vibration detector for detecting a residual vibration signal after the interference of the control vibration against the vibration;
an active vibration controller for driving the control vibration source so as to reduce the vibration using a control algorithm including a transfer function between the control vibration source and the residual vibration detector based on the reference signal and the residual vibration signal;
an identification signal supplier for supplying each of identification signals in sinusoidal waveforms to the control vibration source;
a response signal reader for reading the residual vibration signal when the control vibration according to each of the identification signals is developed form the control vibration source in synchronization with a sampling clock;
a transfer function identifier for identifying the transfer function based on the residual vibration signal read by the response signal reader; and
a frequency selector for selecting the one by one frequencies of the identification signals in the sinusoidal waveforms, the frequency selector selecting the frequencies of the respective identification signals in the sinusoidal waveforms so that a frequency interval between mutually adjacent selected frequencies in particular frequency band is shorter than that in any other frequency bands. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
and wherein the phase lag (θ
) becomes large as the frequency becomes high.
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18. An adaptive control apparatus as claimed in claim 1, wherein the vibration source is a vehicular engine, the identification signal supplier supplies each of the identification signals as the sinusoidal waveforms to the control vibration source when a switch is turned on, the control vibration source comprises an active engine mount, the particular frequency band ranges from a minimum limit fU to a maximum limit fL, fU being set to 20 Hz and fL being set to 80 Hz, the frequency (fo) of each identification signal being increased from a minimum value fmin (fmin=10 Hz) to the maximum limit (fmax) by a predetemined increment (Δ
- f) and being increased from fU to FL by a half of the predetermined increment (Δ
f/2), and being increased from above fU to a maximum value fmax (fmax=100 Hz) by the predetermined increment (Δ
f), and the identified transfer function C is substituted into a transfer function filter (C−
) for he vibration reduction control purpose.
- f) and being increased from fU to FL by a half of the predetermined increment (Δ
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19. An adaptive control apparatus comprising:
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a vibration source;
a control vibration source which is enabled to develop a control vibration to be interfered against a vibration developed from the vibrations source;
a reference signal generator for detecting a vibration developed condition of the vibration source and outputting the vibration developed condition indicative signal as a reference signal;
a residual vibration detector for detecting a residual vibration signal after the interference of the control vibration against the vibration;
an active vibration controller for driving the control vibration source so as to reduce the vibration using a control algorithm including a transfer function between the control vibration source and the residual vibration detector based on the reference signal and the residual vibration signal;
an identification signal supplier for supplying an identification signal in sinusoidal waveforms whose frequency is chargeable to the control vibration source;
a response signal reader for reading the residual vibration signal when the control vibration according to each of the identification signals is developed from the control vibration source in synchronization with a sampling clock;
a transfer function identifier for identifying the transfer function based on the residual vibration signal rad by the response signal reader; and
a frequency selector for selecting he frequency of the frequency changeable identification signal in he sinusoidal waveform at a first predetermined interval of frequency when the frequency of the identification signal falls in a particular frequency band and at a second predetermined interval of frequency when the frequency falls in any other frequency bands than the particular frequency band, the first predetermined interval of frequency being shorter than the second predetermined interval of frequency.
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20. An adaptive control apparatus comprising:
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a vibration source;
a control vibration source means for developing a control vibration to be interfered against a vibration developed from the vibration source;
a reference signal generating means for detecting a vibration developed condition of the vibration source and outputting the vibration developed condition indicative signal as a reference signal;
a residual vibration detecting means for detecting a residual vibration signal after the interference of the control vibration against the vibration;
an active vibration controlling means for driving the control vibration source means so as to reduce the vibration using a control algorithm including a transfer unction between the control vibration source means and the residual vibration detecting means based on the reference signal and the residual vibration signal;
an identification signal supplying means for supplying each of identification signals in sinusoidal waveforms to the control vibration source means;
a response signal reading means for reading the residual vibration signal when the control vibration according to each of the identification signals is developed from the control vibration source means in synchronization with a sampling clock;
a transfer function identifier for identifying the transfer function based on the residual vibration signal red by the response signal reader; and
a frequency selecting means for selecting one by one frequencies of the identification signals in the sinusoidal waveforms, the frequency selecting means selecting the frequencies of the respective identifications signals in the sinusoidal waveforms so that a frequency interval between mutually adjacent selected frequencies in a particular frequency band is sorter than that in any other frequency bands.
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21. A method for actively controlling a reduction of a vibration developed and transmitted from a vibration source, comprising the steps of
providing a control vibration source which is enabled to develop a control vibration to be interfered against the vibration developed form the vibration source; -
detecting a vibration developed condition of the vibration source and outputting the vibration developed condition indicative signal as a reference signal;
detecting a residual vibration signal after the interference of the control virbration against the vibration;
driving the control vibration source so as to reduce the vibration using a control algorithm including a transfer function between the control vibration source and the residual vibration detector based on the reference signal and the residual vibration signal;
supplying each of identification signals in sinusoidal waveforms to the control vibration source;
reading the residual vibration signal when the control vibration according to each of the identification signals is developed form the control vibration source in synchronization with a sampling clock, identifying the transfer function based on the residual vibration signal read at the previous reading step; and
selecting one by one frequencies of the identifications signals in the sinusoidal waveforms, the selecting step selecting the frequencies of the respective identification signals in the sinusoidal waveforms so that a frequency interval between mutually adjacent selected frequencies in a particular frequency band is shorter than that in any other frequency bands, a vibration source;
a control vibration source means for developing a control vibration to be interfered against a vibration developed from the vibration source;
a reference signal generating means for detecting a vibration developed condition of the vibration source and outputting the vibration developed condition indicative signal as a reference signal;
a residual vibration detecting means for detecting a residual vibration signal after the interference of the control vibration against the vibration;
an active vibration controlling means for driving the control vibration source means so as to reduce the vibration using a control algorithm including a transfer function between the control vibration source means and he residual vibration detecting means based on the reference signal and the residual vibration signal;
an identification signal supplying means for supplying each of identification signals in sinusoidal waveforms to the control vibration source means;
a response signal reading means for reading the residual vibration signal when the control vibration according to each of the identification signals is developed form the control vibration source means in synchronization with a sampling clock;
a transfer function identifier for identifying the transfer function based on the residual vibration signal read by the response signal reader; and
a frequency selecting means for selecting one by one frequencies of the identification signals in the sinusoidal waveforms, the frequency selecting means selecting the frequencies of the respective identification signals in the sinusoidal waveforms so that a frequency interval between mutually adjacent selected frequencies in a particular frequency band is shorter than that in nay other frequency bands.
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Specification