TY  - UNPB
T2  - ADCHEM 2003
A1  - Choudhury, M.A.A.S.
A1  - Thornhill, N.F.
A1  - Shah, S.L.
TI  - A data-driven model for valve stiction
ID  - discovery486
Y1  - 2003/01/11/
UR  - https://discovery.ucl.ac.uk/id/eprint/486/
N1  - Unpublished
AV  - public
M2  - Hong Kong
N2  - The presence of nonlinearities, e.g., striction, hysteresis and backlash in a control valve limits the control loop performance. Striction is the most common problem in spring-diaphragm type valves, which are widely used in the process industry. Though there have been many attempts (EnTech, 1998; Gerry and Ruel, 2001; Horch and Isaksson, 1998; Taha et al., 1996; Piipponen, 1996; McMillan, 1995) to understand the stiction phenomena and model it, there is a lack of a proper model which can be understood and related directly to the practical situation as observed in a real valve in the process industry. This study focuses on the understanding, from real life data, of the mechanism that causes stiction and proposes a new data-driven model of stiction, which can be directly related to real valves. It compares simulation results generated using the proposed model with industrial data.
KW  - stiction
KW  -  stickband
KW  -  deadband
KW  -  hysteresis
KW  -  backlash
KW  -  control valve
KW  -  static friction
KW  -  viscous friction
KW  -  nonlinearity
KW  -  slip jump
KW  -  control loop performance
ER  -