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AFPoly: Alias-Free Polyreference User Guide |
AFPoly™ refers to a multi-reference modal parameter estimation technique that has been developed by ATA Engineering, Inc., (ATA). AFPoly is a Laplace domain method that utilizes orthogonal polynomials and accounts for out-of-band modes when solving for modal parameters. This method is explained in references [1-2].
The AFPoly IMAT™ application uses this algorithm to solve for modal parameters (natural frequency, damping, and shape coefficients) in a step-by-step manner. After reading frequency response functions (FRFs) into AFPoly, the user will solve for poles. A stability diagram helps the user select the valid poles. Shapes are then extracted and the results verified by overlaying various test and synthesized mode indicator functions. Once the shapes have been verified, they can be written to a file.
This user guide will explain the AFPoly
AFPoly, SDOFit, spVIEW, and IMAT are trademarks of ATA Engineering, Inc. Other trade names are trademarks of their respective organizations.
AFPoly is protected in Korea under patent number 10-1194238 and in Japan under patent number 4994448. US and European patents pending.