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Binary search for time-constant estimation in first order systems, FiO2 - SpO2 case study

conference contribution
posted on 2023-05-23, 08:28 authored by Sadeghi Fathabadi, O, Timothy GaleTimothy Gale, Jan OlivierJan Olivier, Peter DargavillePeter Dargaville, Wheeler, KI, Kai LimKai Lim
A binary search method for fast identification of the time-constant in first order systems is proposed. The unimodality of the Root Mean Square Error (RMSE) is exploited to achieve fast convergence. As an application example, the method is applied to the oxygen transport system of a preterm infant. Performance of the proposed binary algorithm is compared with a direct search method for two different selections of primary range and estimation precision. The results verify convergence, accuracy, and speed of the proposed algorithm in a practical identification application with noisy recorded signals. The algorithm is also shown to be successful in following the correct trajectory even when the best value of the time constant is out of the primary search space. This method can be applied to any one-dimensional optimization problem where the parameter of interest is a unimodal function of the unknown variable.

History

Publication title

Proceedings of the 6th Biomedical Engineering International Conference (BMEiCON2013)

Editors

C Pintavirooj

Pagination

1-5

ISBN

978-1-4799-1466-1

Department/School

School of Engineering

Publisher

IEEE

Place of publication

USA

Event title

6th Biomedical Engineering International Conference (BMEiCON2013)

Event Venue

Krabi, Thailand

Date of Event (Start Date)

2013-10-23

Date of Event (End Date)

2013-10-25

Rights statement

Copyright 2013 IEEE

Repository Status

  • Restricted

Socio-economic Objectives

Clinical health not elsewhere classified