公开(公告)号：US20250060273A1

公开(公告)日：2025-02-20

申请号：US18807828

申请日：2024-08-16

Applicant: GUANGZHOU UNIVERSITY

Inventor： Huimeng ZHOU ,  Ao XUN ,  Xusheng ZHENG ,  Ping TAN

IPC: G01M7/00 ,  G06F17/11

Abstract: Present disclosure provides a test method and system for a seismic isolation structure, the method comprising: loading driving displacement time history signal into a substructure of the structure, recording restoring force time history feedback signal of the substructure; applying restoring force time history feedback signal to numerical substructure of seismic isolation structure, solving dynamic response of numerical substructure, recording structural displacement response time of the numerical substructure; calculating root-mean-square error (RMSE) of driving displacement time history signal and structural displacement response time signal; judging whether the RMSE is less than a threshold; if the RMSE is less than the threshold, ending the experiment; if the RMSE is not less than the threshold: correcting the time history signals according to a model identification algorithm, obtaining a corrected driving displacement time history signal of the next iteration, loading the corrected driving displacement time history signal onto the substructure, and repeating the steps.

公开(公告)号：US12104985B2

公开(公告)日：2024-10-01

申请号：US17715501

申请日：2022-04-07

Applicant: ACOUSTIC RESEARCH SYSTEMS, LLC

Inventor： Eric Friedlander ,  Jeremiah Leiter ,  Edward Kinsella ,  Michael Robert Wheeler

IPC: G01M7/00 ,  H04R1/02 ,  H04R1/26 ,  H04R1/30 ,  H04R3/00 ,  H04R1/40

CPC classification number: G01M7/00 ,  H04R1/025 ,  H04R1/26 ,  H04R1/30 ,  H04R3/00 ,  H04R1/403 ,  H04R1/406 ,  H04R2201/401

Abstract: A modular acoustic system for use to perform acoustic testing on an object across an entire audible spectrum with enhanced efficiency and acoustic capabilities is provided. The acoustic system includes an acoustic device having a housing to store a horn assembly with a plurality of transducers, an amplification and power distribution device with an amplifier electrically coupled to the horn assembly of the acoustic device, and a controller operably connected to the amplification and power distribution device. The controller is designed to transmit a plurality of noise signals over a network to the amplifier of the amplification and power distribution device to enable the plurality of transducers of the acoustic device to generate a plurality of acoustic waves across the entire audible spectrum.

公开(公告)号：US11180992B2

公开(公告)日：2021-11-23

申请号：US16795184

申请日：2020-02-19

Applicant: Joy Global Underground Mining LLC

Inventor： Edward F. Niederriter ,  Jeffrey A. Ley

IPC: E21C35/24 ,  E21C35/08 ,  G06F11/30 ,  G01M7/00 ,  E21D23/26 ,  E21D23/14

Abstract: Methods and systems of monitoring and controlling a longwall mining system. One system includes a shearer including a cutter drum and a sensor mounted to the shearer. The system also includes an electronic controller including a processor and a memory, the electronic controller communicatively coupled to the sensor. The electronic controller is configured to receive vibration data from the sensor and determine a current vibration level experienced by a cutter drum of the shearer based on the vibration data. The electronic controller is also configured to compare the current vibration level to a vibration threshold. The electronic controller is also configured to detect an impact event associated with the cutter drum of the shearer based on the comparison and generate an impact event indication associated with the impact event.

公开(公告)号：US10823643B2

公开(公告)日：2020-11-03

申请号：US15332134

申请日：2016-10-24

Applicant: Aktiebolaget SKF

Inventor： Magnus Bellander ,  Per-Erik Larsson

IPC: G01M99/00 ,  F16F15/00 ,  G01M13/045 ,  G01M7/00 ,  G01M13/00 ,  G05D19/02

Abstract: The embodiments herein relate to a method performed by an analyzing device for handling dynamic characteristics of a vibrating machine component. The analyzing device monitors vibration of the machine component in real-time. When the vibration of the machine component is below and close to a threshold, the analyzing device provides a real-time indication of that the vibration of the machine component is below and close to the threshold. The analyzing device obtains the dynamic characteristics of the machine component when the vibration is below and close to the threshold. A change of the dynamic characteristics influences how close the vibration is to the threshold.

公开(公告)号：US10787275B2

公开(公告)日：2020-09-29

申请号：US15974739

申请日：2018-05-09

Applicant: Ratier-Figeac SAS

Inventor： Brian P. Huth ,  Abdellah El Haloui

IPC: B64C11/00 ,  B64C11/04 ,  G01L1/22 ,  G01M7/00 ,  G01M1/00 ,  B63H3/00 ,  B64C11/30 ,  B64D45/00 ,  G01M5/00 ,  G01L5/13 ,  G01M1/28 ,  G07C5/00 ,  G07C5/08

Abstract: A method of monitoring the health of an aircraft propeller whilst the propeller is in operation, the propeller having a plurality of blades extending radially outwardly from a central axis extending through the propeller and a propeller drive shaft, is provided. The method includes obtaining measurements representative of strain in the propeller drive shaft using multiple primary strain sensors, each primary strain sensor providing respective measurements representative of strain. The primary strain sensors are located around a circumference of the drive shaft of the propeller, and each strain sensor is located such that it crosses a plane defined by the radial direction of a blade and the central axis, the plane being bounded by the central axis. A corresponding propeller health monitoring system, an aircraft propeller comprising the system and an aircraft comprising the propeller are also provided.

公开(公告)号：US10725448B2

公开(公告)日：2020-07-28

申请号：US16713541

申请日：2019-12-13

Applicant: Computational Systems, Inc.

Inventor： John W. Willis ,  William E. Childress

IPC: G05B19/4065 ,  H03K17/60 ,  H03K5/24 ,  G01M7/00

Abstract: A sensor signal conditioning circuit of a machinery health monitoring module is disposed between a machine sensor and an analog-to-digital converter (ADC). The circuit includes a sensor interface connector, first and second operational amplifiers, a Nyquist filter, and first and second gain flattening feedback networks. The interface connector can connect to multiple types of sensors for monitoring various machine characteristics. The output of the first operational amplifier is coupled to the positive input of the ADC, and the output of the second operational amplifier is coupled to the negative input of the ADC. The first operational amplifier provides a high impedance differential interface to the analog sensor signal and a low impedance interface to the positive input of the ADC. The second operational amplifier provides an inverted copy of a signal at the positive input of the ADC and a low impedance interface to the negative input of the ADC.

公开(公告)号：US20190310130A1

公开(公告)日：2019-10-10

申请号：US16449875

申请日：2019-06-24

Applicant: Rockwell Automation Technologies, Inc.

Inventor： Robert J. Miklosovic ,  Mark A. Chaffee

IPC: G01H1/00 ,  G01M13/045 ,  G01M13/028 ,  G01M7/00 ,  G01H3/04 ,  G01N29/46 ,  G01N29/14 ,  H02P23/14 ,  H02P23/12 ,  H02P6/10 ,  G01N29/44

Abstract: An improved system and method for analyzing motor performance to detect vibration of an electric machine controlled by a motor drive is disclosed. A load observer determines an estimated torque present as a load on the motor as a function of input signals corresponding to a desired torque to be generated by the motor and to a measured angular position of the motor during operation. The motor drive determines a frequency response of the estimated torque to identify at what magnitude and frequency any vibration components are present within the estimated torque signal. The motor drive compares the frequency response of the estimated torque signal to set points. If the measured magnitude of vibration at a particular frequency, as seen in the frequency response, exceeds a threshold set in one of the set points for that frequency, the motor drive

公开(公告)号：US10330567B2

公开(公告)日：2019-06-25

申请号：US15098664

申请日：2016-04-14

Applicant: SIEMENS AKTIENGESELLSCHAFT

Inventor： Henning Ochsenfeld

IPC: G01M13/00 ,  G01M13/028 ,  G01H1/00 ,  G01M7/00

Abstract: In a method for the automated monitoring of a machine with a rotating machine component, at successive measurement times parameter values (Pt) of operating parameters of the machine and in each case over a predefined measurement duration, vibrations of the machine are recorded. A vibration spectrum (Yt(f)) of the vibrations recorded during the measurement duration is determined for each measurement duration. A mean power density (Φt(i)) of the vibration spectrum (Yt(f)) is in each case determined from the vibration spectrum (Yt(f)) for a multiplicity of frequency ranges. During a learning phase a model function ({circumflex over (Φ)}(1)(P) to {circumflex over (Φ)}(N)(P)) for an averaged power density is determined for each frequency range as a function of the operating parameters. During a monitoring phase for each measurement time and each frequency range an expected mean power density ({circumflex over (Φ)}(i)(Pt)) is determined from the model function ({circumflex over (Φ)}(1)(P) to {circumflex over (Φ)}(N)(P)) established in the learning phase for the frequency range, and compared with the mean power density (Φt(i)) established from the recorded vibrations.

公开(公告)号：US10302530B2

公开(公告)日：2019-05-28

申请号：US14663294

申请日：2015-03-19

Applicant: Aktiebolaget SKF

Inventor： Johannes I. Boerhout

IPC: G01M13/00 ,  H04W52/02 ,  G01M13/02 ,  G01M7/00 ,  G01M99/00 ,  G01H1/00 ,  G01M13/028

Abstract: Methods and systems to achieve highly efficient rotational machine integrity determinations in which at least one sensor (106) senses indicia (105) such as time-varying rotational indicia from a rotational motive apparatus (103) and a processor (108) may provide many different functions including but not limited to operational function energy apportioning decisional processing, data compression, intelligent hierarchical data ranking, differential data processing, or the like perhaps to generate information (109) such as a rotational integrity abridgment transmissor to which an abridgment transmissor electromagnetic signal (112) may be created and perhaps even transmitted from a rotational motive apparatus to facilitate a machine integrity determination.

公开(公告)号：US20190072459A1

公开(公告)日：2019-03-07

申请号：US16183919

申请日：2018-11-08

Applicant: Sun Hwi LEE

Inventor： Sun Hwi LEE

IPC: G01M13/04 ,  G01M5/00 ,  G01M7/00

Abstract: The present invention relates to a facility fault diagnosing method using a vibration characteristic, which comprises the steps of: dividing a vibration generated according to a fault of a facility into a plurality of vibration characteristics, configuring detailed vibration code items by subdividing the vibration characteristics, and associating and databasing the detailed vibration code items for each fault type to store the detailed vibration code items; receiving an input of a detailed vibration code item selection signal for the each vibration characteristic from a user; and determining a fault type of a facility on the basis of the each input detailed vibration code item and association information between the fault type and the detailed vibration code items. According to the present invention, a vibration fault is diagnosed through a combination of a plurality of detailed vibration components by breaking a scheme of diagnosing the vibration fault using only one vibration component so that a more reliable facility fault diagnosis can be performed.