Sample-induced delays in synchronous multirate systems

Author

Wittenmark, Bjorn

Author_Institution

Dept. of Autom. Control, Lund Inst. of Technol., Lund, Sweden

fYear

2001

fDate

4-7 Sept. 2001

Firstpage

3276

Lastpage

3281

Abstract

In many industrial applications the communication in a distributed control system is done over layered synchronous or asynchronous control buses. In this paper we consider the type of delays and control deterioration that can be obtained due to the communication delays. The main source of the delays considered in this paper is the sample-induced delays caused by the multirate sampling in the communication between the different parts of the control system and the process. The paper analyzes some bus structures with respect to delays and possibilities for control. The result is that it sometimes can be surprisingly long delays that have to be compensated for in the design of the controller. Some possible ways for compensation are discussed and illustrated in the paper.

Keywords

control system synthesis; delays; distributed control; asynchronous control bus; communication delay; controller design; distributed control system; layered synchronous control bus; multirate sampling; sample-induced delay; synchronous multirate system; Actuators; Delay effects; Delays; Europe; Synchronization; Distributed control systems; Multirate control; Network-controlled systems; Sampled-data systems; Time delay systems;

fLanguage

English

Publisher

ieee

Conference_Titel

Control Conference (ECC), 2001 European

Conference_Location

Porto

Print_ISBN

978-3-9524173-6-2

Type

conf

Filename

7076438