INVESTIGATION ON GYROCOMPASSING AN INERTIAL PLATFORM

Abstract

An investigation was made of the alignment of an inertial navigation system by gyrocompassing. The method of gyrocompassing is developed and the effects of initial tilt, gyro drifts, reference velocity error and noise on the accuracy of alignment is studied. Gyrocompassing is defined in this report as the method of aligning a system to north by detecting the presence of a component of earth rate (W sub IE) cos L sin psi, on its misaligned east axis. The following conclusions are drawn from the report: (1) the basicACCURACY OF THE ALIGNMENT IS DETERMINED BY THE ACCURACY OF THE REFERENCE VELOCITY AND THE DRIFT RATE OF THE EAST GYRO; (2) the system should be leveled before it is gyrocompassed; and (3) the noise present in the reference velocity limits the natural frequency of the system and hence the time required to align. (Author)

Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1961
Accession Number
AD0254975

Entities

People

  • David K. Eto
  • David K. Thommen

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Errors
  • Frequency
  • Guidance
  • Inertial Navigation
  • Inertial Navigation Systems
  • Navigation
  • Platforms
  • Resonant Frequency
  • Stabilized Platforms

Fields of Study

  • Engineering
  • Physics

Readers

  • Inertial Navigation Systems.
  • Positioning, Navigation, and Timing (PNT) Technology.
  • Tribology (the study of the boundary interaction between sliding surfaces, lubrication, wear and friction).