SECOND-ORDER ANALYSIS OF ROLL DECAY TESTS

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Authors
  1. Graham, R.
  2. Webber, A.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
A method for determining linear plus quadratic roll damping coefficients from roll decay tests that is believed to be accurate up to second order in the damping coefficients is described. Two computer programs are developed to estimate roll decay coefficients via chi-square fitting using first-order and second order analyses. The methods are applied to measured and simulated roll decay data, and excellent results are obtained with both codes. While the second-order results represent an improvement in both goodness-of-fit and accuracy compared with the first-order results, the latter are already so good that the improvement is considered to be of limited practical significance.
Report Number
DREA-TM-91-211 — Technical Memorandum
Date of publication
15 Aug 1991
Number of Pages
23
DSTKIM No
92-00550
CANDIS No
103447
Format(s):
Document Image stored on Optical Disk

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