Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Mechanical measurement system
Reexamination Certificate
2011-06-21
2011-06-21
Kundu, Sujoy K (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Mechanical measurement system
C702S033000, C073S379010, C073S573000, C073S574000, C073S575000, C073S576000, C073S577000, C073S578000, C073S579000
Reexamination Certificate
active
07966134
ABSTRACT:
The present invention provides systems and methods to use a measured driving-point response of a nonlinear material to determine one or more elastic properties of the material. The present invention takes advantage of the full information represented by the transient component, the steady-state component, the anharmonic components, and the nonlinear response components of a measured driving-point response of a real nonlinear material, without limitation in the use of large-amplitude forces. The elastic properties are determined by forming and solving a time-domain system of linear equations representing a differential equation model of the driving-point motions of the material. Based on a single, short duration, large-amplitude driving point measurement, both linear and nonlinear properties can be determined; both large-amplitude and near-zero amplitude properties can be determined; and elastic-wave speed and elastic moduli and their variation with depth can be determined.
REFERENCES:
patent: 3836757 (1974-09-01), Nachtigal et al.
patent: 5495763 (1996-03-01), Rhodes
patent: 6289734 (2001-09-01), Daugela
patent: 6324915 (2001-12-01), Potts
patent: 6522974 (2003-02-01), Sitton
patent: 2616908 (1988-12-01), None
Kerschen, et al., 2001 Journal of Sound and Vibration 244(4):597-613 “Theoretical and Experimental Identification of a Non-Linear Beam”.
Doughty, et al., 2002 Journal of Sound and Vibration 249(4):785-813 “A Comparison of Three Techniques Using Steady State Data to Identify Non-Linear Modal Behavior of an . . . ”.
Communication from the European Patent Office of Applicant's corresponding application EP 05734861.7, dated Nov. 23, 2009, 6 pages.
Wulich et al, 1990a, “PLL based discrete time varying filter for estimation of parameters . . . ”, Proc. Int'l Symp. Circuits & Syst. IEEE, May 1990, v1:771-774.
Wulich et al, 1990b, “Constrained notch filtering of nonuniformly spaced samples . . . ”, IEEE Trans. Acoust. Speech & Sig. Proc, 39(10):2359-2363. [US].
Wulich et al, 1991, “Synthesis of discrete time-varying null filters for frequency-varying signals . . . ”, IEEE Trans. Circuits & Syst, 37(8):977-990. [US].
LandOfFree
Systems and methods to determine elastic properties of... 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 to determine elastic properties of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Systems and methods to determine elastic properties of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2695268