STRAPDOWN NAVIGATION ALGORITHMS IMPLEMENTED IN THE INERTIAL AND GEOGRAPHIC FRAMES

Authors
  1. Liang, D.F.
  2. Johnson, R.H.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
The report presents two strapdown navigation software processing algorithms, one implemented in the inertial frame and other in the local-level geographic frame. The presentation includes derivation of various mechanization equations to obtain positional and navigational information from input data provided by three gyros and accelerometers. Directional cosine matrix and quaternion update procedures together with initialization schemes are also presented. In the inertial frame implementation a new exact algorithm was derived to transform inertially referenced data into geographic coordinates. Simulation results of a C141 race-track flight profile are presented to indicate the level of performance accuracy for the above two processing algorithms. Complete listings of software programs are also presented in the Appendices.
Report Number
TN-82-25 —
Date of publication
15 Sep 1983
Number of Pages
70
DSTKIM No
85-00045
CANDIS No
44885
Format(s):
Hardcopy;Originator's fiche received by DSIS

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