Dynamic Inertia Measurement Method

Metadata Updated: May 2, 2019

Critically important inertia measurements are complex and expensive to obtain due to the extensive fixturing and custom instrumentation of conventional techniques. This research effort has validated a more efficient, less risky, and faster inertia measurement technique for aerospace vehicles. The dynamic inertia measurement method is based on conventional ground vibration testing methods, which are routinely performed in other types of aircraft testing. The basic concept is to compute the inertia properties and center-of-gravity location of an object by measuring all forces acting on the object and the rigid body motion caused by these forces. Work to date: All testing has been completed and two technical papers describing the results have been published. The DIM method was implemented to measure the mass properties of the test article, as were then the conventional pendulum oscillation methods, to compare results, level of effort, and costs. The DIM method showed favorable results for the center of gravity and moments of inertia; however, the products of inertia showed appreciable disagreement with analytical predictions. Looking ahead: he next project phase, testing on an aerospace vehicle, has not yet been funded. Partner:  ATA Engineering, Inc. provided software and support for the testing. Benefits Less risky: Does not require the vehicle to be suspended, reducing risk and equipment needs Less expensive: Eliminates the complex and expensive fixturing and equipment used in conventional measurement techniques Faster: Dramatically decreases testing and approval times by weeks or even months Applications Airplanes and space vehicles (capsules and lifting body spacecraft) Automobiles and other large terrestrial vehicles  

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Public: This dataset is intended for public access and use. License: U.S. Government Work

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Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_14476
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Metadata Catalog ID https://data.nasa.gov/data.json
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Datagov Dedupe Retained 20190501230127
Harvest Object Id 8569d645-9713-4cde-add2-b8e6e10a6c92
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2014-08-01
Homepage URL https://techport.nasa.gov/view/14476
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash 0e32370ab7aae5ec3b413b0db74eb9526d13217a
Source Schema Version 1.1

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