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Research on Gas Sensor Fault Diagnosis Based on Rough Set and Evidence Theory

Author: HuYaZuo
Tutor: FuHua
School: Liaoning Technical University
Course: Control Theory and Control Engineering
Keywords: Rough Set D-S evidence theory Troubleshooting Information Fusion Gas sensor
CLC: TP212
Type: Master's thesis
Year: 2009
Downloads: 124
Quote: 0
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Abstract


Gas sensor as a coal mine safety monitoring system, a key component of its performance is good or bad is essential, if false , it will cause huge economic losses and casualties , so study the fault diagnosis technology has important practical significance. Thesis for the purpose of solving the above problems , the use of evidence based on rough set theory and DS combined gas sensor fault diagnosis method to study the rough set theory and DS evidence theory advantages and disadvantages , and the feasibility of the two theories were used in combination analysis, development of this technology in the gas sensor fault diagnosis among embodiment . First, the gas sensor output value and its impact on the type of fault analysis , fault diagnosis model established ; Secondly, the model for discrete data sample processing , the establishment of decision-making table and apply the matrix can be distinguished attribute decision table reduction ; again , about reduced decision table data into DS evidence theory among the basic probability assignment based decision rules for evidence synthesis ; Finally, in the experimental stage , the application of the theory to make a gas sensor troubleshooting. Thesis focused to achieve a rough set theory and DS evidence combining information fusion process , the experimental results show that the method can improve the thesis coal mine identification of environmental information and decision-making effect can be effective for gas sensor fault diagnosis , and effectively improve a fault diagnosis algorithm speed and accuracy, the fault diagnosis field has good application prospects.

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CLC: > Industrial Technology > Automation technology,computer technology > Automation technology and equipment > Automation components,parts > Transmitter ( converter),the sensor
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