Abstract

The characteristics of two control schemes for inertial stabilization, stable platform and strapdown, are investigated, based primarily on the analysis of their transfer functions. Since the basic control structures of stable platform and strapdown schemes to suppress disturbed body motion are feedback and feedforward, respectiveiy, sensor imperfection such as limited bandwidth and transport delay affects very differently to the two schemes ; stability decrease for the stable platform scheme and error increase for the strapdown scheme. Flexibility affects also differently for the two schemes. A couple of design criteria for the tradeoff of the schemes are derived, and are illustrated by numerical examples.

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