Relations Between Generalized JST Algorithm and Kalman Filtering Algorithm for Time Scale Generation

no code implementations • 24 Aug 2023 • Yuyue Yan, Takahiro Kawaguchi, Yuichiro Yano, Yuko Hanado, Takayuki Ishizaki

In this paper, we present a generalized Japan Standard Time algorithm (JST-algo) for higher-order atomic clock ensembles and mathematically clarify the relations of the (generalized) JST-algo and the conventional Kalman filtering algorithm (CKF-algo) in the averaged atomic time and the clock residuals for time scale generation.

Structured Kalman Filter for Time Scale Generation in Atomic Clock Ensembles

no code implementations • 10 May 2023 • Yuyue Yan, Takahiro Kawaguchi, Yuichiro Yano, Yuko Hanado, Takayuki Ishizaki

In this article, we present a structured Kalman filter associated with the transformation matrix for observable Kalman canonical decomposition from conventional Kalman filter (CKF) in order to generate a more accurate time scale.

Disconnection-aware Attack Detection and Isolation with Separation-based Detector Reconfiguration

no code implementations • 23 Sep 2020 • Hampei Sasahara, Takayuki Ishizaki, Jun-ichi Imura, Henrik Sandberg

In accordance with the disconnection, the equipped attack detection unit should be reconfigured to maintain its detection capability.

Parameterization of All Output-Rectifying Retrofit Controllers

no code implementations • 26 Aug 2020 • Hampei Sasahara, Takayuki Ishizaki, Jun-ichi Imura

This study investigates a parameterization of all output-rectifying retrofit controllers for distributed design of a structured controller.