Fault Diagnosis Method of Industrial Process Based on Switched Linear Dynamic System Model
A dynamic system model and fault diagnosis technology, applied in general control systems, control/regulation systems, test/monitoring control systems, etc., can solve the problem of inability to meet the actual industrial process monitoring requirements, unfavorable industrial process automation implementation, and inability to achieve satisfactory monitoring. effect and other issues, to achieve the effect of being conducive to automation implementation, improving the effect of fault diagnosis, and enhancing the grasp of process status.
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[0016] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0017] The invention provides an industrial process fault diagnosis method based on switching linear dynamic system model. The method aims at the problem of industrial process fault diagnosis. Firstly, the distributed control system is used to collect the data of normal working Data of fault conditions, and classify them into categories of conditions. Then the linear dynamic system model is established for different working condition categories, and then the switched linear dynamic system model is established. Store the model parameters in the database for later use. When monitoring and diagnosing new online data, first use Gaussian and filtering methods to obtain the posterior probability of the data under various working conditions, and then obtain the fault diagnosis results.
[0018] The main steps of the technical solution adopted in t...
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