US5715320A
Expired / Lapsed
US
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Active adaptive selective control system
Assignee: Digisonix Inc
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Filing: 1995-08-21
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Granted: 1998-02-03
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Expires: 2015-08-21
Abstract
Abstract An active adaptive control system introduces a control signal from an output transducer (14) to combine with the system input signal (6) and yield a system output signal (8). An error transducer (16) senses the system output signal and provides an error signal (44). An adaptive filter model (40) has a model input from a reference signal (42) correlated to the system input signal, and an output outputting a correction signal (46) to the output transducer to introduce the control signal. Performance of the model is selectively controlled to control the signal sent to the output transducer. Various monitoring and control methods are provided, including spectral leak signal monitoring and control, correction signal monitoring and control, frequency responsive spectral transfer function processing of the leak signal and/or the correction signal, reference signal processing, and fuzzy logic control.
Inventors
- 👤 Mark C. Allie
- 👤 Larry J. Eriksson
- 👤 Charles W. Brokish
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 13:53
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/16; G10K11/175; G10K11/178; G10K11/1787; G10K11/17879; G10K11/1781; G10K11/17813; G10K11/17817; G10K11/1783; G10K11/17833; G10K11/1785; G10K11/17853; G10K11/17854; G10K11/17881; G10K2210/00; G10K2210/10; G10K2210/112; G10K2210/30; G10K2210/301; G10K2210/3012; G10K2210/3017; G10K2210/3028; G10K2210/3029; G10K2210/3037; G10K2210/3049
Claims Analysis
Total Claims: 45
Claim 1
Independent Claim
112 words
An active adaptive control method comprising introducing a control signal from an output transducer to combine with a system input signal and yield a system output signal, sensing said system output signal with an error transducer providing an error signal, providing an adaptive filter model having a model input from a reference signal correlated to said system input signal, and an output outputting a correction signal to said output transducer to introduce said control signal, spectrally controlling performance of said model to maximize the signal sent to said output transducer at frequencies of interest, providing a spectral leak signal degrading performance of said model, and controlling said leak signal according to frequency.
Claim 2
Dependent Claim
112 words
An active adaptive control method comprising introducing a control signal from an output transducer to combine with a system input signal and yield a system output signal, sensing said system output signal with an error transducer providing an error signal, providing an adaptive filter model having a model input from a reference signal correlated to said system input signal, and an output outputting a correction signal to said output transducer to introduce said control signal, spectrally controlling performance of said model to maximize the signal sent to said output transducer at frequencies of interest, providing a spectral leak signal degrading performance of said model, and controlling said leak signal according to frequency.
Claim 3
Dependent Claim
19 words
The method according to claim 1 comprising monitoring said correction signal and controlling said leak signal in response thereto.
Claim 4
Dependent Claim
16 words
The method according to claim 2 comprising filtering said correction signal to provide said leak signal.
Claim 5
Dependent Claim
24 words
The method according to claim 3 comprising spectrally processing said correction signal by supplying said correction signal through a frequency responsive spectral transfer function.
Claim 6
Dependent Claim
36 words
The method according to claim 4 comprising modeling the transfer function between said output transducer and said error transducer with a second model, and wherein said spectral transfer function is a function of said second model.
Claim 7
Dependent Claim
29 words
The method according to claim 4 comprising supplying said correction signal from said model output through said frequency responsive spectral transfer function to an error input of said model.
Claim 8
Dependent Claim
62 words
The method according to claim 2 wherein said model output outputs said correction signal to said output transducer to introduce said control signal according to a weight update signal, and comprising combining said reference signal and said error signal to provide said weight update signal, and controlling said leak signal by controlling said weight update signal in response to said correction signal.
Claim 9
Dependent Claim
61 words
The method according to claim 1 comprising providing a copy of said model, said copy having an output supplied to said error input of said model, said copy having a filter input receiving a spectrally proccessed input signal from a spectral transfer function, said copy having a control input controlling convergence gain of said copy and receiving a spectral control signal.
Claim 10
Dependent Claim
17 words
The method according to claim 8 wherein said spectral control signal is responsive to said correction signal.
Claim 11
Dependent Claim
37 words
The method according to claim 9 comprising providing a second spectral transfer function, and supplying said correction signal through said second spectral transfer function to said control input of said copy to provide said spectral control signal.
Claim 12
Dependent Claim
17 words
The method according to claim 10 wherein said first and second spectral transfer functions are the same.
Claim 13
Dependent Claim
42 words
The method according to claim 10 comprising modeling the transfer function between said output transducer and said error transducer with a second model, and wherein each of said first and second spectral transfer functions is a function of said second transfer function.
Claim 14
Dependent Claim
16 words
The method according to claim 10 wherein said first and second spectral transfer functions are different.
Claim 15
Dependent Claim
61 words
The method according to claim 1 comprising spectrally processing said leak signal such that at frequencies where maximum power from said output transducer reaches said error transducer, the correction signal supplied to said output transducer is maximized, and at frequencies where minimum power from said output transducer reaches said error transducer, the correction signal supplied to said output transducer is minimized.
Claim 16
Dependent Claim
36 words
The method according to claim 14 comprising modeling the transfer function between said output transducer and said error transducer with a second model, and spectrally processing said leak signal as a function of said second model.
Claim 17
Dependent Claim
20 words
The method according to claim 15 wherein said function of said second model is the inverse of said second model.
Claim 18
Dependent Claim
120 words
The method according to claim 16 wherein said first model is controlled by an update signal from said inverse of said second model such that at frequencies where maximum power from said output transducer reaches said error transducer, said second model has a maximum transfer characteristic and said inverse of said second model has a minimum transfer characteristic minimizing leakage of said update signal, to enable maximum output of said first model, and at frequencies where minimum power from said output transducer reaches said error transducer, said second model has a minimum transfer characteristic and said inverse of said second model has a maximum transfer characteristic maximizing leakage of said update signal, to minimize the output of said first model.
Claim 19
Dependent Claim
16 words
The method according to claim 1 comprising filtering said reference signal to provide said leak signal.
Claim 20
Dependent Claim
24 words
The method according to claim 18 comprising spectrally processing said reference signal by supplying said reference signal through a frequency responsive spectral transfer function.
Claim 21
Dependent Claim
36 words
The method according to claim 19 comprising modeling the transfer function between said output transducer and said error transducer with a second model, and wherein said spectral transfer function is a function of said second model.
Claim 22
Dependent Claim
19 words
The method according to claim 18 comprising monitoring said correction signal and controlling said leak signal in response thereto.
Claim 23
Dependent Claim
24 words
The method according to claim 1 comprising spectrally processing said leak signal by supplying said leak signal through a frequency responsive spectral transfer function.
Claim 24
Dependent Claim
29 words
The method according to claim 22 wherein said leak signal is provided by said correction signal, and comprising supplying said correction signal through said frequency responsive spectral transfer function.
Claim 25
Dependent Claim
29 words
The method according to claim 23 comprising supplying said correction signal from said model output through said frequency responsive spectral transfer function to said error input of said model.
Claim 26
Dependent Claim
40 words
The method according to claim 24 comprising providing a copy of said model, and supplying said correction signal from said model output through said frequency responsive spectral transfer function and through said copy to said error input of said model.
Claim 27
Dependent Claim
36 words
The method according to claim 22 comprising providing a copy of said model, and supplying said leak signal through said frequency responsive spectral transfer function and through said copy to said error input of said model.
Claim 28
Dependent Claim
71 words
The method according to claim 26 wherein said copy has a filter input receiving the output of said frequency responsive spectral transfer function, said copy has a control input controlling convergence gain of said copy, and comprising providing a second frequency responsive spectral transfer function, and supplying said correction signal from said output of said model through said second frequency responsive spectral transfer function to said control input of said copy.
Claim 29
Dependent Claim
20 words
The method according to claim 26 comprising supplying a random noise signal to the input of said spectral transfer function.
Claim 30
Dependent Claim
25 words
The method according to claim 26 comprising supplying said correction signal from said output of said model to the input of said spectral transfer function.
Claim 31
Dependent Claim
19 words
The method according to claim 1 comprising spectrally controlling performance of said model in response to said correction signal.
Claim 32
Dependent Claim
83 words
The method according to claim 30 wherein said model outputs said correction signal to said output transducer to introduce said control signal according to a weight update signal, and comprising combining said reference signal and said error signal to provide said weight update signal, monitoring and spectrally sensing said correction signal and providing selective leakage of said weight update signal in response thereto to control performance of said model according to frequency, to optimize performance of said model in frequency ranges of interest.
Claim 33
Dependent Claim
65 words
The method according to claim 30 comprising providing a copy of said model and supplying the output of said copy to said error input of said model and monitoring and spectrally sensing said correction signal and providing an input to said copy in response thereto to control performance of said model according to frequency, to optimize performance of said model in frequency ranges of interest.
Claim 34
Dependent Claim
23 words
The method according to claim 1 comprising frequency weighting said leak signal to optimize performance of said model in frequency ranges of interest.
Claim 35
Dependent Claim
25 words
The method according to claim 33 comprising frequency weighting said leak signal by spectrally processing said correction signal through a frequency responsive spectral transfer function.
Claim 36
Dependent Claim
32 words
The method according to claim 33 comprising frequency weighting said leak signal by spectrally processing said correction signal through a frequency responsive spectral transfer function and through a copy of said model.
Claim 37
Dependent Claim
33 words
The method according to claim 33 comprising frequency weighting said leak signal by spectrally processing a random noise signal through a frequency responsive spectral transfer function and through a copy of said model.
Claim 38
Dependent Claim
55 words
The method according to claim 33 comprising frequency weighting said leak signal by spectrally processing a random noise signal through a first frequency responsive spectral transfer function and through a copy of said model, and spectrally processing said correction signal through a second frequency responsive spectral transfer function and through said copy of said model.
Claim 39
Dependent Claim
54 words
The method according to claim 33 comprising frequency weighting said leak signal by spectrally processing said correction signal through a first frequency responsive spectral transfer function and through a copy of said model, and spectrally processing said correction signal through a second frequency responsive spectral transfer function and through said copy of said model.
Claim 40
Dependent Claim
19 words
The method according to claim 1 comprising spectrally controlling performance of said model in response to said reference signal.
Claim 41
Dependent Claim
83 words
The method according to claim 39 wherein said model outputs said correction signal to said output transducer to introduce said control signal according to a weight update signal, and comprising combining said reference signal and said error signal to provide said weight update signal, monitoring and spectrally sensing said reference signal and providing selective leakage of said weight update signal in response thereto to control performance of said model according to frequency, to optimize performance of said model in frequency ranges of interest.
Claim 42
Dependent Claim
116 words
An active adaptive control system comprising an output transducer introducing a control signal to combine with a system input signal and yield a system output signal, an error transducer sensing said system output signal and providing an error signal, an adaptive filter model having a model input from a reference signal correlated to said system input signal, and an output outputting a correction signal to said output transducer to introduce said control signal, a spectral controller spectrally controlling performance of said model to maximize the signal sent to said output transducer at frequencies of interest, said spectral controller providing a spectral leak signal degrading performance of said model and controlling said leak signal according to frequency.
Claim 43
Dependent Claim
116 words
An active adaptive control system comprising an output transducer introducing a control signal to combine with a system input signal and yield a system output signal, an error transducer sensing said system output signal and providing an error signal, an adaptive filter model having a model input from a reference signal correlated to said system input signal, and an output outputting a correction signal to said output transducer to introduce said control signal, a spectral controller spectrally controlling performance of said model to maximize the signal sent to said output transducer at frequencies of interest, said spectral controller providing a spectral leak signal degrading performance of said model and controlling said leak signal according to frequency.
Claim 44
Dependent Claim
107 words
An active adaptive control method comprising introducing a control signal from an output transducer to combine with a system input signal and yield a system output signal, sensing said system output signal with an error transducer providing an error signal, providing an adaptive filter model having a model input from a reference signal correlated to said system input signal, and a model output outputting a correction signal to said output transducer to introduce said control signal according to a weight update signal, adaptively varying said weight update signal by providing a spectral leak signal degrading performance of said model and controlling said leak signal according to frequency.
Claim 45
Dependent Claim
107 words
An active adaptive control method comprising introducing a control signal from an output transducer to combine with a system input signal and yield a system output signal, sensing said system output signal with an error transducer providing an error signal, providing an adaptive filter model having a model input from a reference signal correlated to said system input signal, and a model output outputting a correction signal to said output transducer to introduce said control signal according to a weight update signal, adaptively varying said weight update signal by providing a spectral leak signal degrading performance of said model and controlling said leak signal according to frequency.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-02-02 | 2001-08-04 | 2002-02-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-02-02 | 2005-08-04 | 2006-02-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-02-02 | 2009-08-04 | 2010-02-03 | $7700.00 | Window Closed / Lapsed |