Data processing: measuring – calibrating – or testing – Calibration or correction system – Pressure
Reexamination Certificate
2005-04-12
2005-04-12
Barlow, John (Department: 2863)
Data processing: measuring, calibrating, or testing
Calibration or correction system
Pressure
C702S085000
Reexamination Certificate
active
06879922
ABSTRACT:
A method for providing a corrective modulation signal to suppress an acoustic pressure wave in an operational system. The method includes sampling the acoustic pressure wave generated in the operational system; sampling a previously generated corrective modulation signal; performing fast Fourier transform processing on the sampled acoustic pressure wave; a pair of single frequency discrete Fourier transform processing is performed on the sampled acoustic pressure wave; determining the frequency, phase and magnitude of a dominate pressure wave in the acoustic pressure wave based on the fast Fourier and discrete Fourier transform processing; generating a sinusoidal corrective modulation signal to suppress the acoustic pressure wave based on the frequency, phase and magnitude of the dominate pressure wave and the parameters of the previously generated corrective modulation signal, the corrective modulation signal being at substantially the same frequency as, and generally 180 degrees out of phase with, the acoustic pressure wave.
REFERENCES:
patent: 3936606 (1976-02-01), Wanke
patent: 4122674 (1978-10-01), Andersson et al.
patent: 4409787 (1983-10-01), Davi et al.
patent: 4607529 (1986-08-01), Morey
patent: 5018202 (1991-05-01), Takahashi et al.
patent: 5347586 (1994-09-01), Hill et al.
patent: 5380190 (1995-01-01), Kumagai
patent: 5386689 (1995-02-01), Bozich et al.
patent: 5445517 (1995-08-01), Kondou et al.
patent: 5533121 (1996-07-01), Suzuki et al.
patent: 5575144 (1996-11-01), Brough
patent: 5621656 (1997-04-01), Langley
patent: 5636287 (1997-06-01), Kubli et al.
patent: 5668744 (1997-09-01), Varadan et al.
patent: 5685157 (1997-11-01), Pandalai et al.
patent: 5778081 (1998-07-01), Patrick
patent: 5791889 (1998-08-01), Gemmen et al.
patent: 5966452 (1999-10-01), Norris
patent: 5996337 (1999-12-01), Blosser et al.
patent: 6108413 (2000-08-01), Capman et al.
patent: 6137886 (2000-10-01), Shoureshi
patent: 6170265 (2001-01-01), Polifke et al.
patent: 6330336 (2001-12-01), Kasama
patent: 6650701 (2003-11-01), Hsiang et al.
Haddad, W; Chellasina, V; Kablar N;“Active Control of Combustion Instabilities via Hybrid Resetting Controllers”;Proceedings American Control Conference; vol. 4; Jun. 28, 2000; pp 2378-2382.*
Krstic, M; Krupadanam, A; Jacobson, C;“Adaptive Stabilization of Nonlinear Acoustic Oscillations in Combustion Chambers”; Proceedings of the 36th IEEE Conference on Decision and Control; vol. 4; Dec. 10-12, 1997; pp 3640-3645.*
Krstic, M; Krupadanam, A; Jacobson, C;“self-tuning control of a nonlinear model of combustion instabilities”; Proceedings IEEE International Conference on Control Applications; Oct. 5-7, 1997; pp 285-287.
Austin Michael Eugene
Hogle Joseph Alan
Shaver Steven Mark
Wise Michael Glynn
Barlow John
General Electric Company
Hunton & Williams LLP
Washburn Douglas N
LandOfFree
Systems and methods for suppressing pressure waves using... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Systems and methods for suppressing pressure waves using..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems and methods for suppressing pressure waves using... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3377688