By Topic

Networked control systems with delay [Tutorial]

Sign In

Cookies must be enabled to login.After enabling cookies , please use refresh or reload or ctrl+f5 on the browser for the login options.

Formats Non-Member Member
$33 $13
Learn how you can qualify for the best price for this item!
Become an IEEE Member or Subscribe to
IEEE Xplore for exclusive pricing!
close button

puzzle piece

IEEE membership options for an individual and IEEE Xplore subscriptions for an organization offer the most affordable access to essential journal articles, conference papers, standards, eBooks, and eLearning courses.

Learn more about:

IEEE membership

IEEE Xplore subscriptions

1 Author(s)
Vasilis Tsoulkas ; Gen. Secretariat for Res. & Technol., Athens, Greece

The issue of time-delay is of primary importance in different areas of modern control systems and instrumentation such as power systems, industrial process control including the steel and oil industry, machining and metallurgical processes, remotely operated robots and control over computer networks (or as it is also known Networked Control Systems) to name a few. A Networked Control System (NCS) is a feedback control system where the feedback loops are closed by means of an electronic network. It is well known that Networked (Control) Systems are not subject to the same design assumptions as non-networked systems, a fact that is mainly due to the inevitable presence of network delays and packet drops. In a typical closed-loop NCS, the state is sampled periodically, transmitted through the network, becomes available to the controller, which after computing the control action, transmits the sampled signal to the event-driven actuator after an uncertain or constant but unknown delay. The plant receives this command via a Zero Order Hold device (ZOH) after a delay τ, which models the sum total of the involved transmission delays. These network-induced delays appear in the information flow between the sensor and the controller (delay τsc (k)), as well as between the controller and the actuator (delay τca (k)), where k denotes the dependence on the kth sampling period.

Published in:

Computational Intelligence, Communication Systems and Networks (CICSyN), 2010 Second International Conference on

Date of Conference:

28-30 July 2010