Stimulus signal generation method to maximize dynamic range in frequency response function calculations
US5051916A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 12, 1990 |
| Grant date | Sep 24, 1991 |
| Priority date | — |
| Expiry date | Jan 12, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R23/16
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method for generating a stimulus signal for conducting frequency response function calculations maximizes the overall dynamic range of the calculations possible by balancing the requirements for dynamic range between the input channels of a Fourier analyzer used for monitoring the input and output of the system under analysis. A preferred version of the method includes the steps of estimating the frequency response function of the system under analysis, inverting the estimated frequency response function, taking the square root of the inverted estimated frequency response function, randomizing the phase of the inverse square-root estimated frequency response function, converting the phase-randomized inverse square-root estimated frequency response function to a time domain test signal, scaling the time domain test signal as necessary to produce the stimulus signal for conducting frequency response function calculations. If more accuracy is required, the method can be repeated using the results of one calculation as the estimated frequency response function input to the next calculation iteration. As the method is repeated and increasingly accurate results are obtained, the cross …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.