US 12,264,998 B2
Vibration control system
Kazuyoshi Ueno, Osaka (JP); Yoshikado Yamauchi, Osaka (JP); and Yuji Nakaura, Osaka (JP)
Assigned to IMV CORPORATION, Osaka (JP)
Filed by IMV CORPORATION, Osaka (JP)
Filed on Nov. 28, 2023, as Appl. No. 18/521,654.
Application 18/521,654 is a continuation of application No. 17/280,993, granted, now 11,879,816, previously published as PCT/JP2019/041305, filed on Oct. 21, 2019.
Claims priority of application No. 2019-015493 (JP), filed on Jan. 31, 2019.
Prior Publication US 2024/0125669 A1, Apr. 18, 2024
Int. Cl. G01M 7/02 (2006.01)
CPC G01M 7/022 (2013.01) [G01M 7/025 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A vibration control system comprising:
a vibration physical quantity detection sensor configured to detect a vibration physical quantity of a test object that is vibrated by a vibration generator operated on the basis of a drive waveform;
a processor, memory and instructions, the instructions when executed:
determine a response vibration physical quantity PSD (Power Spectral Density) by subjecting a response vibration physical quantity waveform from the vibration physical quantity detection sensor to the Fourier transform;
determine a drive PSD on the basis of the response vibration physical quantity PSD, reference vibration physical quantity PSD, the response vibration physical quantity waveform, and the drive waveform; and
determine a non-Gaussian random drive waveform by subjecting spectrum data, which is generated from the drive PSD, to an inverse Fourier transform analysis, and setting the non-Gaussian random drive waveform as the drive waveform for the vibration generator in order to obtain desired non-Gaussian characteristics, wherein
the instructions that determine the drive waveform include:
instructions that determine a Gaussian drive waveform by subjecting amplitude spectrum data, which is generated from the drive PSD, to an inverse Fourier transform with providing uniformly distributed random phases,
instructions that convert the Gaussian drive waveform into a non-Gaussian drive waveform at least based on non-Gaussian conversion characteristics,
instructions that extract a phase of each frequency component as a non-Gaussian signal phase by subjecting the non-Gaussian random waveform to the Fourier transform, and
instructions that determine the drive waveform by subjecting the drive PSD to an inverse Fourier transform by providing the non-Gaussian signal phase.