Journal of Shanghai Jiaotong University ›› 2014, Vol. 48 ›› Issue (07): 1009-1014.

• Automation Technique, Computer Technology • Previous Articles     Next Articles

Control Performance Assessment in the Presence of Valve Stiction Nonlinearities

SHI Minghua1,WANG Xu2,XIE Lei1,ZHAO Lujun3
  

  1. (1. State Key Laboratory of Industrial Control Technology, Institute of CyberSystem and Control, Zhejiang University, Hangzhou 310027, China; 2. Shanghai Nuclear Engineering Research and Design Institute, Shanghai 200233, China; 3. Zhejiang Supcon Software Co. Ltd., Hangzhou 310053, China)
  • Received:2013-07-27 Online:2014-07-28 Published:2014-07-28

Abstract:

Control performance assessment (CPA) is an important strategy to establish the quality of industrial control loops. However, most CPA methods are mainly restricted to linear systems, ignoring common process nonlinearities such as valve stiction. To tackle this problem, a control performance assessment method based on the improved radial basis function (RBF) nonlinear timeseries model in the presence of valve stiction nonlinearities was proposed in this paper. By applying the Hinich test method into the RBF learning, which guarantees the removing of the nonlinear part of the output, the performance benchmark was estimated using standard time series identification techniques. The simulation of an integral process verifies the validity of the proposed method.
 

Key words: control performance assessment (CPA), valve stiction, radial basis function (RBF), improved network evaluation criterion

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