Application of Control Theory in the Formation of a Timescale

Abstract

We have created a timescale that joins the short-term stability of several hydrogen masers with the long-term capabilities of an ensemble of cesium frequency standards. Control theory is utilized in a system design that combines frequency standards with varied properties. The system steers a maser ensemble with respect to a cesium ensemble while minimally perturbing the maser short-term performance. Results are given from both simulated and measured data. Systems are designed using linear quadratic Gaussian (LQG) and pole-placement techniques.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2004
Accession Number
ADA427849

Entities

People

  • D. Johns
  • J. Skinner
  • P. Koppang

Organizations

  • United States Naval Observatory

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Atomic Beam Masers
  • Control Systems
  • Control Theory
  • Equations
  • Filters
  • Frequency
  • Frequency Standards
  • Frequency Synthesizers
  • Gaussian Noise
  • Intervals
  • Masers
  • Prototypes
  • Riccati Equation
  • Standards
  • Steering
  • Time Intervals

Fields of Study

  • Physics

Readers

  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.