Title :
A simple method for oscillation diagnosis in process control loops
Author :
Horch, Alexander
Author_Institution :
R. Inst. of Technol., Stockholm, Sweden
Abstract :
A simple method for the diagnosis of oscillations in process control loops is presented. The new method is based on the cross-correlation between control variable and loop output and it is shown to correctly diagnose the two most important reasons for oscillations in control loops in the process industry, namely external oscillating disturbances and static friction (stiction) in control valves
Keywords :
control system analysis; correlation methods; oscillations; process control; control valves; control variable; cross-correlation; external oscillating disturbances; loop output; oscillation diagnosis; process control loops; static friction; stiction; Automatic control; Computerized monitoring; Distributed control; Friction; Industrial control; Inspection; Process control; Testing; Valves;
Conference_Titel :
Control Applications, 1999. Proceedings of the 1999 IEEE International Conference on
Conference_Location :
Kohala Coast, HI
Print_ISBN :
0-7803-5446-X
DOI :
10.1109/CCA.1999.801157
