The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 06, 1977
Filed:
Nov. 17, 1975
Edwin A Sloane, Los Altos, CA (US);
Bruce T McKeever, Mountain View, CA (US);
Time/Data Corporation, Santa Clara, CA (US);
Abstract
A system for determining the modal characteristics of a structure in which a plurality of driving signals which have a common preselected frequency and a preselected set of amplitudes and phases corresponding to the estimated parameters of a mode of interest are applied to the structure. The common preselected frequency is in general a complex frequency. The response of the structure to the driving signals are then sensed. Means are provided for receiving the driving signals and the sensed responses, for generating a set of transfer functions characteristic of the structure corresponding to the mode of interest and for obtaining from such set of transfer functions improved estimates of the complex frequencies and complex residues of the mode of interest, that is the damping, frequency, magnitudes and phases of the mode of interest. By varying the preselected frequency and preselected set of amplitudes and phases to correspond to each mode in the structure, all of the modes in the structure and the shapes thereof are determined.