A simple method for detection of stiction in control valves

被引：166
作者：
Horch, A [1 ]
机构：
[1] Royal Inst Technol, Dept Signals Sensors & Syst, S-10044 Stockholm, Sweden
来源：
CONTROL ENGINEERING PRACTICE | 1999年 / 7卷 / 10期
关键词：
oscillation detection; diagnosis; stiction; cross-correlation;
D O I：
10.1016/S0967-0661(99)00100-8
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
A simple method diagnosing oscillations in process control loops is presented. The new method is based on the cross-correlation between control input and process output and it is shown to correctly distinguish between two important reasons for oscillations in control loops in the process industry, namely external oscillating disturbances and static friction (stiction) in control valves. (C) 1999 Elsevier Science Ltd. All rights reserved.
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页码：1221 / 1231
页数：11
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