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Closed-loop control system early failure detection and diagnosis method and closed-loop control system early failure detection and diagnosis system

A closed-loop control and early failure technology, which is applied in general control systems, control/regulation systems, test/monitoring control systems, etc., can solve problems such as the inability to identify minor faults, and achieve the effects of fast speed, avoiding misjudgment, and high efficiency

Active Publication Date: 2019-07-23
中广核工程有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This application provides a method and system for early fault detection and diagnosis of a closed-loop control system, which solves the technical problem in the prior art that micro-faults cannot be identified due to structural compensation or fault tolerance of closed-loop control, and achieves high detection efficiency and speed And more in line with the actual needs of the site

Method used

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Embodiment 1

[0033] The embodiment of this application provides an early fault detection and diagnosis method for a closed-loop control system, please refer to figure 1 , the method comprises the steps of:

[0034] S0. Establish a real closed-loop control system on site according to requirements; for example, establish a real closed-loop control system according to the actual controlled object, measuring equipment and different controllers;

[0035] S1. Establish a virtual closed-loop control system based on the data assimilation technology and the mathematical mechanism model of the equipment; establish a virtual closed-loop control system based on the data assimilation technology, which is one-to-one mapped with the real closed-loop control system; the established virtual closed-loop control system can follow the real The closed-loop system changes and does not need to be re-established repeatedly; it avoids the interference caused by artificially establishing a virtual closed-loop contr...

Embodiment 2

[0063] An embodiment of the present invention provides an early fault detection and diagnosis system for a closed-loop control system, which is applicable to the early fault detection and diagnosis method for a closed-loop control system shown in Embodiment 1. In order to realize the above-mentioned closed-loop control system based on data assimilation fault detection and diagnostic methods, Figure 6 It is a schematic diagram of an early fault detection and diagnosis system of a closed-loop control system provided in Embodiment 2 of the present invention, and the system includes:

[0064] A real closed-loop control system establishment module 100 is used to establish a real closed-loop control system on site according to actual needs; such as establishing a real closed-loop control system according to actual controlled objects, measuring equipment and different controllers;

[0065] The virtual closed-loop control system establishment module 200 is connected to the real close...

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Abstract

The invention discloses a closed-loop control system early failure detection and diagnosis method, and the method comprises the following steps: S0, building an on-site real closed-loop control systemaccording to actual needs; S1, based on a data assimilation technology and a mathematical mechanism model of equipment, building a virtual closed-loop control system; S2, based on the real closed-loop control system and the virtual closed-loop control system, analyzing to obtain residual error of the real closed-loop control system relative to the virtual closed-loop control system; S3, accordingto the obtained residual error, identifying failure type in the real closed-loop control system. With the method and the system provided by the invention, technical problems of low accuracy of smallfailure diagnosis and difficulty in diagnosis in the prior art are solved, and the small failure in the closed-loop control system can be identified quickly and accurately.

Description

technical field [0001] The invention relates to a fault detection technology applicable to a closed-loop control system of a nuclear power plant, in particular to a method and system for early fault detection and diagnosis of the closed-loop control system. Background technique [0002] The complexity and scale of modern control systems and equipment continue to increase, and the failure of such systems will cause huge loss of life and property. As an important method and powerful measure to improve system reliability and reduce accident risk, fault diagnosis becomes more and more important. However, regardless of the scale and ferocity of the failures, these failures all start from small failures (early failures, initial failures, incipient failures). Early detection of micro-faults faces the following difficulties: (1) External interference makes it difficult to diagnose micro-faults. The operating environment of the equipment is complex and changeable, and minor faults ...

Claims

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Application Information

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IPC IPC(8): G05B23/02
CPCG05B23/0262G05B2219/24065
Inventor 凌君谭珂谢红云温小梅赵建光
Owner 中广核工程有限公司
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