A passive inertial navigation system generates position information containing an oscillating error. Previous flight-test results of a gimballess navigator clearly indicate this unwanted oscillation. External velocity information, reduced from aerial photographs, was successfully employed in the study to damp the oscillation in flights under the same dynamic environment. Comparison of undamped and damped position error curves proves velocity damping had little effect on average system error, but improves position uncertainty by approximately 43%. To optimize the inertial system for all flight conditions, the study results suggest a variable damping ratio. Values of 0.7 prior to take off and between 0.07 and 0.l after take off are recommended. (Author)
The Feasibility of a Velocity-Damped Inertial Navigation System
1964
2 pages
Report
Keine Angabe
Englisch
Doppler radar error equations for damped inertial navigation system analysis
Tema Archiv | 1975
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