Title :
Dynamic sampling deadtime compensator for distributed field control system
Author_Institution :
Sci. Syst. Co., Woburn, MA, USA
Abstract :
We analyze the static and dynamic sensitivity functions of the closed-loop system transfer function to the variations of both input and output sampling time. Based on the sensitivity functions, we present a simple dynamic sampling deadtime compensator for a distributed field control system. This compensator can effectively reduce the impact of sampling time variation on the system performance in terms of setpoint variation frequently occurring in the downstream loop of a cascade control system. Our compensator can be easily implemented in any field device control system.
Keywords :
cascade control; closed loop systems; compensation; digital simulation; distributed control; field buses; sampled data systems; transfer functions; transmitters; valves; cascade control system; closed-loop system transfer function; distributed field control system; downstream loop; dynamic sampling deadtime compensator; dynamic sensitivity functions; field device; input/output sampling time; sampling time variation; static sensitivity functions; Communication system control; Control systems; Data conversion; Distributed control; Microprocessors; Process control; Sampling methods; System performance; Transfer functions; Valves;
Conference_Titel :
Intelligent Control and Automation, 2002. Proceedings of the 4th World Congress on
Print_ISBN :
0-7803-7268-9
DOI :
10.1109/WCICA.2002.1020132
