Method for automatically identifying resonance
US10184917B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 8, 2016 |
| Grant date | Jan 22, 2019 |
| Priority date | — |
| Expiry date | Apr 15, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2291/015
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A resonance estimation system implements resonance detection methods that can obtain accurate estimates of a motion system's resonance and amplitude without the need for a high-resolution encoder or high-frequency sampling. The system solves for resonance information by removing the slow motion dynamics and fast torque control dynamics from the measured speed transfer function in order to obtain resonance transfer function. Smoothing functions are applied to the obtained resonance frequency response data to remove spikes and obtain relatively smooth gain and phase curves for the resonance frequency response. The system then applies a searching algorithm to determine the locations of the phase peaks in the phase curve data, and uses these phase peak locations to locate the gain peaks in the gain curve data, which correspond to the resonance frequencies and amplitudes. This approach allows the gain peaks to be located even when analyzing non-ideal gain curves that are degraded by noise.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.