Accession Number : AD0677808

Title :   IN-MOTION ALIGNMENT OF THE INERTIAL PLATFORM UTILIZING A STRONG GRAVITATIONAL FIELD,

Corporate Author : GENERAL DYNAMICS/ASTRONAUTICS SAN DIEGO CA

Personal Author(s) : Farmer, R. E. L.

Report Date : 25 MAY 1961

Pagination or Media Count : 79

Abstract : In this analysis the concept of an ideal linear sensor unit (acceleration sensing device) is used to show how to compute the angular velocity of an ideal platform which obeys leveling and compassing constraints. Some simplification of computation is obtained by the proper choice of an ideal platform (true) coordinate frame and by assuming that the platform is near the earth. The computed angular velocity is used to drive the actual platform. When the linear sensor unit on the platform is used to supply the computer inputs, it is shown that the platform oscillates in the manner of a Schuler-tuned pendulum. To control the errors in alignment externally derived quantities are introduced in feedback loops. The results of the analysis provide error block diagrams of leveling and compassing. (Author)

Descriptors :   (*STABILIZED PLATFORMS, ALIGNMENT), GRAVITY, MATHEMATICAL ANALYSIS, ACCELEROMETERS, VELOCITY, OSCILLATION, ERRORS, FEEDBACK.

Subject Categories : Navigation and Guidance

Distribution Statement : APPROVED FOR PUBLIC RELEASE