Method of animating structural vibration under operational conditions

• US 7,689,385 B2
• Filed: 10/29/2007
• Issued: 03/30/2010
• Est. Priority Date: 10/29/2007
• Status: Active Grant

• Current Assignee: Aerojet Rocketdyne Of De, Inc. (L3Harris Technologies, Inc.)
• Original Assignee: Pratt & Whitney Rocketdyne Incorporated (L3Harris Technologies, Inc.)
• Inventors: Shen, Lawrence
• Primary Examiner(s): TSAI, CAROL S W
• Application Number:
  US11/926,557
• Publication Number:
  US 20090112340A1
• Time in Patent Office: 883 Days
• Field of Search: 702/34, 702/128, 702/182, 702/183, 702/190, 700/97, 376/259, 738/659, 264/40.1
• US Class Current: 702/190
• CPC Class Codes: G01M 13/028 Acoustic or vibration analysis

Abstract

A method of analyzing structural vibration according to one aspect of the present invention includes reception of data from a plurality of sensors on a structure, filtration of the data to exclude data outside of a selected frequency band, association of sensor locations with locations on computer model, and generation of an animation which displays the structural vibration.

Claims

1. A method of analyzing structural vibration, comprising:

receiving data from a plurality of sensors on a structure, said receiving comprising;

mounting a first sensor to the structure to measure data along a first axis;

mounting a second sensor to the structure adjacent to the first sensor to measure data along a second axis that is perpendicular to the first axis;

mounting a third sensor to the structure adjacent to the first and second sensors to measure data along a third axis that is perpendicular to the first axis and the second axis;

filtering the data to exclude data outside of a selected frequency band;

associating each sensor location with a location on a computer model of the structure; and

generating an animation of the filtered data.

2. The method as recited in claim 1, wherein said sensors are accelerometers and said data is acceleration data.

3. The method as recited in claim 1, wherein said receiving includes:

repeating said steps of mounting a first sensor, mounting a second sensor, and mounting a third sensor for a plurality of locations.

4. The method as recited in claim 1, further comprising:

applying test conditions to the structure; and

receiving transmissions of data from each of the plurality of sensors.

5. A method of analyzing structural vibration, comprising:

receiving data from a plurality of sensors on a structure;

filtering the data to exclude data outside of a selected frequency band;

associating each sensor location with a location on a computer model of the structure; and

generating an animation of the filtered data, said generating comprising;

receiving a computer model orientation selection;

determining a magnitude of deflection of each of the plurality of sensor locations at a selected time from the filtered data;

recording an image displaying the plurality of sensor locations at the selected orientation reflecting the deflections from said step of determining a magnitude of deflection

selectively repeating said steps of determining a magnitude of deflection and recording an image displaying the plurality of sensor locations at a plurality of time intervals to obtain a desired quantity of images; and

displaying the recorded images in succession to provide an animation of the filtered data.

6. The method as recited in claim 5, including:

storing the recorded images in memory in a video file.

7. The method of claim 6, wherein the video file is an AVI file.

8. The method as recited in claim 5, wherein at least a portion of the recorded images also display the plurality of sensor locations prior to deflection.