NDLI: Weapon IMU transfer alignment using aircraft position from actual flight tests

Content Provider	IEEE Xplore Digital Library
Author	Rogers, R.M.
Copyright Year	1996
Description	Author affiliation: Rogers Eng. & Associates, Gainesville, FL, USA (Rogers, R.M.)
Abstract	This paper presents results from a study of weapon inertial measurement unit (IMU) transfer alignment using the aircraft's navigation system position data. The alignment process consists of first establishing a navigation solution (position, velocity and attitude) using the raw IMU outputs, then via a Kalman filter algorithm estimate errors in the weapon navigation data using aircraft navigation system data as observations. The aircraft's navigation system data is used to initialize the weapon's navigation solution. The results presented in this paper are based on using the aircraft's position data as the filter algorithm's observation. Using flight data, it is shown that a weapon's navigation frame can be aligned to an accuracy of less than 1 milliradian. The alignment error is determined by assuming that the total difference between the weapon's post-alignment free-inertial position and the aircraft's position is the result of horizontal navigation frame tilt error alone. The affect of the aircraft's flexible structure during higher maneuver levels is illustrated.
Starting Page	328
Ending Page	335
File Size	689797
Page Count	8
File Format	PDF
ISBN	0780330854
DOI	10.1109/PLANS.1996.509096
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-04-22
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Weapons Testing Aircraft navigation Filters Vehicle dynamics Instruments Measurement units Accelerometers Acceleration Aerospace simulation
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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