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Fault diagnosis of continuous annealing processes using a reconstruction-based method
- Source :
-
Control Engineering Practice . May2012, Vol. 20 Issue 5, p511-518. 8p. - Publication Year :
- 2012
-
Abstract
- Abstract: The continuous annealing process line (CAPL) has complex process characteristics, such as strong correlation of a large number of process variables and interconnected multi-subsystems and multiple operation zones. Practitioners are concerned with typical process faults, such as strip-break and roll-slippage, whose effects are often confined in a specific zone. Considering the large-scale process characteristics and fault characteristics, a multi-block fault diagnosis method is proposed. A novel reconstruction-based block contribution (RBBC) is first proposed in order to diagnose the faulty block. The reconstruction-based variable contribution (RBVC) within a block is also proposed to determine the faulty variables. The proposed RBBC–RBVC hierarchical scheme is applied successfully to a real CAPL on two fault cases. A finite state machine is utilized to diagnose strip-break and reconstructed combined index is studied to diagnose roll-slippage. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09670661
- Volume :
- 20
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Control Engineering Practice
- Publication Type :
- Academic Journal
- Accession number :
- 73286415
- Full Text :
- https://doi.org/10.1016/j.conengprac.2012.01.005