Application of Control Theory in the Formation of a Timescale

P. Koppang, D. Johns, J. Skinner

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.
Published in:	Proceedings of the 35th Annual Precise Time and Time Interval Systems and Applications Meeting December 2 - 4, 2003 Hilton Resort on Mission Bay San Diego, California
Pages:	319 - 326
Cite this article:	Koppang, P., Johns, D., Skinner, J., "Application of Control Theory in the Formation of a Timescale," Proceedings of the 35th Annual Precise Time and Time Interval Systems and Applications Meeting, San Diego, California, December 2003, pp. 319-326.
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