APPLICATION OF STATISTICAL SMOOTHING TECHNIQUES TO INERTIAL NAVIGATION.

Abstract

All inertial navigation systems are excited by random error inputs such as gyro drift rates, accelerometer errors etc. These errors make the position and velocity errors of the inertial navigator grow unbounded with time if no external measurements are made. Statistical smoothing techniques provide methods of estimating these random inputs from test runs of the system. (Smoothing involves estimating the state of a system at time t using measurements made both before and after time t.) In the present report, a ship's inertial navigation system is considered. It is shown that by using smoothing techniques, uncertainties in the knowledge of random error sources, particularly, gyro drift rates, can be significantly reduced. (Author)

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1968
Accession Number
AD0670004

Entities

People

  • R. K. Mehra

Organizations

  • Harvard University

Tags

DTIC Thesaurus Topics

  • Accelerometers
  • Guidance
  • Inertial Navigation
  • Inertial Navigation Systems
  • Measurement
  • Navigation
  • Navigational Equipment
  • Navigators
  • Uncertainty

Fields of Study

  • Physics

Readers

  • Inertial Navigation Systems.
  • Regression Analysis.