A robust delay‐compensation technique based on memory

A robust delay‐compensation technique based on memory This paper addresses the effects of time delay on actively isolated structures subjected to support excitation. A force proportional to the absolute velocity of the base of the isolated structure applied at the base of the structure (co‐located active damping) is the control scheme considered. The actuating mechanisms have some non‐zero time response. Consequently, if no compensation is provided, the performance of the system is worse than that of the ideal delay‐free controller. The dynamics of the controller‐actuator system is modelled by a delay operator on the feedback signal. Time delays producing instability of the controlled structure are investigated, and the effect of time delay on the mean square acceleration of the structure subjected to stationary random excitation is assessed. A delay‐compensation technique that requires memory of past control actions is proposed and compared with a commonly used compensation technique. By using simple numerical examples, it is shown that the proposed delay‐compensation strategy improves the performance of the system significantly. The technique is extended to other models of the actuator dynamics and modified to provide robustness to small parameter uncertainties. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Earthquake Engineering and Structural Dynamics Wiley

A robust delay‐compensation technique based on memory

Loading next page...
 
/lp/wiley/a-robust-delay-compensation-technique-based-on-memory-j7QvTZhvdY
Publisher
Wiley
Copyright
Copyright © 1994 John Wiley & Sons, Ltd
ISSN
0098-8847
eISSN
1096-9845
DOI
10.1002/eqe.4290230905
Publisher site
See Article on Publisher Site

Abstract

This paper addresses the effects of time delay on actively isolated structures subjected to support excitation. A force proportional to the absolute velocity of the base of the isolated structure applied at the base of the structure (co‐located active damping) is the control scheme considered. The actuating mechanisms have some non‐zero time response. Consequently, if no compensation is provided, the performance of the system is worse than that of the ideal delay‐free controller. The dynamics of the controller‐actuator system is modelled by a delay operator on the feedback signal. Time delays producing instability of the controlled structure are investigated, and the effect of time delay on the mean square acceleration of the structure subjected to stationary random excitation is assessed. A delay‐compensation technique that requires memory of past control actions is proposed and compared with a commonly used compensation technique. By using simple numerical examples, it is shown that the proposed delay‐compensation strategy improves the performance of the system significantly. The technique is extended to other models of the actuator dynamics and modified to provide robustness to small parameter uncertainties.

Journal

Earthquake Engineering and Structural DynamicsWiley

Published: Sep 1, 1994

References

  • Active control and seismic isolation
    Pu, Pu; Kelly, Kelly

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 18 million articles from more than
15,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Search

Query the DeepDyve database, plus search all of PubMed and Google Scholar seamlessly

Organize

Save any article or search result from DeepDyve, PubMed, and Google Scholar... all in one place.

Access

Get unlimited, online access to over 18 million full-text articles from more than 15,000 scientific journals.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve

Freelancer

DeepDyve

Pro

Price

FREE

$49/month
$360/year

Save searches from
Google Scholar,
PubMed

Create folders to
organize your research

Export folders, citations

Read DeepDyve articles

Abstract access only

Unlimited access to over
18 million full-text articles

Print

20 pages / month

PDF Discount

20% off