計測自動制御学会論文集
Online ISSN : 1883-8189
Print ISSN : 0453-4654
ISSN-L : 0453-4654
論文
ベクトル型可変忘却要素付き逐次最小二乗法を用いた非定常雑音下における原子時計の内部状態推定
馬渕 俊一郎平野 将人足立 修一井戸 哲也花土 ゆう子
著者情報
ジャーナル フリー

2020 年 56 巻 2 号 p. 45-50

詳細
抄録

Invention of atomic clock dramatically improved accuracy of time measurement, such as time scale, which is an application of atomic clock. However, even the best atomic clock accumulates error, or time deviation, which grows with time. For that reason, compensating for this deviation is a fundamental problem. In this paper, we propose an estimation method using Recursive Least-Squares Method with Vector-type Variable Forgetting Factor (VVFF-RLS) for multiple atomic clocks system. In multiple atomic clocks system, achieving reliable estimation of time deviations of atomic clocks is one of the most important tasks. An atomic clock, which counts the inter-atomic transition frequency to keep an accurate one second, sometimes suffers its abnormal behaviours of frequency due to environmental factors. The proposed method employs vector-type variable forgetting factor whose each component is allocated for the corresponding clock, and achieves a reliable estimation by sequentially determining the forgetting factor on the basis of the frequency stability. The usefulness of the proposed method is validated through numerical examples.

著者関連情報
© 2020 公益社団法人 計測自動制御学会
前の記事 次の記事
feedback
Top