Title :
The impact of control delay upon the performance of a DC-motor control: Comparison of a centralized vs. a network-based approach
Author :
Dornelas, Marcos T. ; Dutra, Thiago F. ; Santos, Max M. ; Portugal, Paulo ; Vasques, Francisco
Author_Institution :
Centro Univ. do Leste de Minas Gerais, Coronel Fabriciano, Brazil
Abstract :
An important aspect when dealing with computer control systems is the impact of control delay upon the performance of the controlled item. Such control delay may be a consequence of the computer controlled implementation or, for the case of a network based control system, can be the consequence of the use of a communication network to interconnect sensors and actuators with the controller. Basically, control applications require a predictable delay between measurement and actuation, with small variability, i.e., small jitter. In this paper we present some simulation results concerning the impact of a varying control delay upon the performance of a DC-motor, both for a centralized computer-controlled setup and for a network based control system. The results for the centralized setup were also experimentally confirmed. For the network-based setup it was used the h-BEB real-time communication protocol. The evaluated scenarios were simulated using the TrueTime simulator that is based in MATLAB/Simulink. The experimental tests were developed in LabVIEW, where the controller task was executed as a software routine. The tests consisted in the variation of the sampling period and control delay to determinate the steady region of the system.
Keywords :
DC motors; delays; distributed control; machine control; DC-motor control; TrueTime simulator; computer control systems; control delay; h-BEB real-time communication protocol; network based control system; Actuators; Application software; Centralized control; Communication networks; Communication system control; Computational modeling; Computer networks; Control systems; Delay; Sensor systems; computer control system; control delay and DC-motor; network-based control system real-time;
Conference_Titel :
Industrial Electronics, 2009. IECON '09. 35th Annual Conference of IEEE
Conference_Location :
Porto
Print_ISBN :
978-1-4244-4648-3
Electronic_ISBN :
1553-572X
DOI :
10.1109/IECON.2009.5415224