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Using a Kalman Filter and a Padé Approximation to Estimate Random Time Delays In A Networked Feedback Control System

TitleUsing a Kalman Filter and a Padé Approximation to Estimate Random Time Delays In A Networked Feedback Control System
Publication TypeJournal Article
Year of Publication2010
AuthorsProbst, A., M. E. Magana, and O. Sawodny
JournalIET Control Theory & Applications
Volume4
Issue11
Pagination2263
Date Published2010
ISSN17518644
Abstract

This study presents an effective algorithm to handle time delays in a feedback control loop in which both the measurement signals and the control signals are sent through a network where random time delays and packet loss occur. A method is developed to estimate the random time delay when no time stamps are present. Specifically, a Padé approximation is used to model time delay in the frequency domain, which can then be estimated by a Kalman filter. The method is applied to an inverted pendulum, where its effects are illustrated.

DOI10.1049/iet-cta.2009.0339
Short TitleIET Control Theory Appl.