MPFDT: A Fault and Anomaly Diagnosis Tool for PLC Controlled Manufacturing Systems
- 주제(키워드) Artificial neural network (ANN) , electrical energy usage monitoring , fault detection and isolation , industrial process monitoring , programmable logic controller (PLC)
- 발행기관 아주대학교
- 지도교수 Gi-Nam Wang
- 발행년도 2018
- 학위수여년월 2018. 8
- 학위명 박사
- 학과 및 전공 일반대학원 산업공학과
- 실제URI http://www.dcollection.net/handler/ajou/000000027756
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
The Fault and Anomaly Detection and Isolation (FADI) in Programmable Logic Controller (PLC) controlled systems is an important and challenging problem. In this thesis, we present an automated tool, called the Manufacturing Process Failure Diagnosis Tool (MPFDT) that can detect and isolate the faults and anomalies in the PLC controlled manufacturing systems effectively. MPFDT utilizes two independent knowledge-based process behaviour models of the manufacturing system to satisfy the FADI purpose. The fundamental idea is to detect the inconsistencies between the modelled and the observed manufacturing process behaviour. The first model is a Deterministic Finite-state Automaton (DFA) based control process model of the manufacturing system that is used to determine whether the observed state transition behaviour of the PLC control process is consistent with the modelled state transition behaviour or not. The second model is basically a set of Artificial Neural Network (ANN) based one-class classifiers that are used to identify whether any significant difference exist between the observed and the reference electrical power consumption profile of the manufacturing system or not. The experimental results show that the FADI accuracy rate of the proposed tool is very high (more than 98%).
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CONTENTS
CHAPTER 1. INTRODUCTION
CHAPTER 2. BACKGROUND STUDY AND LITERATURE REVIEW
Section 2.1. Decentralized Fault Diagnosis Approaches
Section 2.2. Centralized Fault Diagnosis Approaches
CHAPTER 3. MPFDT: SYSTEM OVERVIEW AND WORKING PRINCIPLE
CHAPTER 4. MDSVTF MODEL FORMULATION AND FADI PROCEDURE
Section 4.1. Theoretical MDSVTF automaton model and its practical applications
Section 4.2. Integrating the trend information of the continuously varying analog I/O signals into the MDSVTF model
Section 4.3. The fault and anomaly detection and isolation procedure of MPFDT (based on the MDSVTF automaton model)
CHAPTER 5. THE POWER CONSUMPTION AND THE ANALOG I/O SIGNAL SEGMENTATION PROCEDURE, AND THE NEURAL NETWORK BASED SIGNAL DEVIATION DETECTION PROCEDURE
Section 5.1. Brief Review of Related Works on Health Condition Monitoring of Industrial Machines
Section 5.2. The Analog PLC I/O Signal Segmentation Procedure
Section 5.3. The Power Consumption Signal Segmentation Procedure
Section 5.4. The Autoassociative Neural Network (AANN) Based Time Series Signal Deviation Detectors
CHAPTER 6. CONCLUSION AND FUTURE WORK
REFERENCES
Appendix I: Transition Time Clustering Algorithm
Appendix II: Experimental Study, Results, and Discussion
