The Design of Electrical Equipment Fault Diagnosis System Based on Fuzzy Inference

2014 ◽  
Vol 1061-1062 ◽  
pp. 716-719
Author(s):  
Feng Hua Zou ◽  
Hong Zhang
Keyword(s):  
Mathematical Model ◽  
Fault Diagnosis ◽  
Programming Language ◽  
Fuzzy Inference ◽  
Fuzzy Reasoning ◽  
Electrical Equipment ◽  
Electric Equipment ◽  
Fault Diagnosis System ◽  
Reasoning Mechanism ◽  
The Mathematical Model

In view of a certain type of electrical equipment whose failure causes and failure is not a one-to-one relationship between signs, this paper established the mathematical model of fault diagnosis adopting the fuzzy reasoning mechanism. At the same time, we designed the system overall scheme of fault diagnosis according to the system of the diagnosis process and realized diagnosis function of system by using vc + + programming language. Through specific examples verify that the system has the ability of fault diagnosis of electric equipment for a certain type.

Control Curves Method of Airframe Geometry Modeling

2013 ◽  
Vol 199 ◽  
pp. 279-284
Author(s):  
Stanisław Kachel
Keyword(s):  
Mathematical Model ◽  
Programming Language ◽  
Methodological Approach ◽  
Aircraft Structures ◽  
Interactive Programming ◽  
Geometry Modeling ◽  
Curves And Surfaces ◽  
Cad Cam ◽  
The Mathematical Model ◽  
Selection Of

The paper presents the methodological approach to development of curves by selection of driving parameters with the application of the method to designing and reproduction of aircraft surfaces on the examples of both newly designed aircrafts and the ones that are already in service. The major assumptions are outlined that are necessary to develop the mathematical model of driving curves and surfaces, these assumptions served as the basis to draw up the relevant algorithms and to convert them to routines of the GRIP (Graphics Interactive Programming) language that is a part of the CAD/CAM/CAE Unigraphics system. These algorithms include the newly developed tool dedicated to design aircraft components and provided with inputs to the multi-criteria synthesis of the aerodynamic profiles of aircrafts. The study comprises also the assumptions to the newly developed algorithms dedicated to modelling of components incorporated into aircraft structures, these algorithms have been successfully implemented by the author.

Fault Diagnosis System Based on Fuzzy-inference

2012 ◽  
Vol 4 (1) ◽  
pp. 51-61 ◽  
Author(s):  
Sen-lin Cheng ◽  
Qiang Wei ◽  
Zhao-hong Ye
Keyword(s):  
Fault Diagnosis ◽  
Fuzzy Inference ◽  
Diagnosis System ◽  
Fault Diagnosis System

scholarly journals Modeling and Simulation of Aviation Engine Ignition Spark Frequency Disorder

2015 ◽  
Vol 9 (1) ◽  
pp. 193-199 ◽  
Author(s):  
Shi Xudong ◽  
Li Hongguang ◽  
Wang Ruowen ◽  
Xu Meng
Keyword(s):  
Mathematical Model ◽  
Fault Diagnosis ◽  
Modeling And Simulation ◽  
Circuit Simulation ◽  
Aircraft Engine ◽  
Safety And Reliability ◽  
Fault Mechanism ◽  
The Mathematical Model ◽  
Ignition Device

Igniter is an important part of aircraft engine, which should be reliable to ensure safety. Spark frequency disorder is common fault to the aviation ignition device, and it is great hidden danger to the aircraft engine. To guarantee the safety and reliability of aviation igniter, the fault mechanism of the aviation ignition spark frequency disorder is researched in this paper. The factors which will result in spark frequency disorder are studied, and the mathematical model of the ignition circuit and circuit simulation are presented, which lays the foundation for the follow-up research on the design of aviation ignition and the fault diagnosis.

scholarly journals Optimization of Reactive Power Compensation Based on Fuzzy Mathematics

2019 ◽  
Vol 136 ◽  
pp. 01020
Author(s):  
Dawa Lunzhu ◽  
Tao Kui ◽  
Ni Ping ◽  
Basang Dunzhu ◽  
Dong Zhihua ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Reactive Power ◽  
Heuristic Method ◽  
Cost Savings ◽  
Fuzzy Reasoning ◽  
Reactive Power Compensation ◽  
Fuzzy Mathematics ◽  
Multi Objective Optimization ◽  
Node Voltage ◽  
The Mathematical Model

This paper proposes a heuristic method for optimization of reactive power compensation. Firstly, two fuzzy sets of node voltage and cost savings are formed. The compensation location with the greatest compensation suitability is obtained by fuzzy reasoning. Considering the operation modes of several different loads, the mathematical model of reactive power compensation optimization is established, and fuzzy multi-objective optimization is adopted. The method solves the fixed and variable compensation capacity, and calculates the compensation capacity for each existing compensation position cycle until the change does not occur. The above process is repeated until the new compensation position is no longer saved, and finally all the compensation positions, capacity and total savings can be obtained. The example analysis shows the effectiveness and practicability of the method.

scholarly journals Fault Diagnostic Methodology for Grid-Connected Photovoltaic Systems

2021 ◽  
Vol 2 (2) ◽  
pp. 10-30
Author(s):  
Proenza Y. Roger ◽  
Camejo C. José Emilio ◽  
Ramos H. Rubén
Keyword(s):  
Mathematical Model ◽  
Fault Diagnosis ◽  
Solar Energy ◽  
False Alarm ◽  
False Alarm Rate ◽  
Real System ◽  
Photovoltaic Systems ◽  
Energy Research ◽  
Santiago De Cuba ◽  
The Mathematical Model

This research focuses on the design of a fault diagnosis methodology to contribute to the improvement of efficiency, maintainability and availability indicators of Grid-Connected Photovoltaic Systems. To achieve this, we start from the study of the mathematical model of the photovoltaic generator, then, a procedure is performed to quantify the operational losses of the photovoltaic generator and adjust the mathematical model of this to the real conditions of the system, through a polynomial adjustment. A real system of nominal power 7.5 kWp installed in the Solar Energy Research Center of the province of Santiago de Cuba is used to evaluate the proposed methodology. Based on the results obtained, the proposed approach is validated to demonstrate that it successfully supervises the system. The methodology was able to detect and identify 100% of the simulated failures and the tests carried out had a maximum false alarm rate of 0.22%, evidencing its capacity.

A Knowledge-Based Controller Used in Process Control Systems

1997 ◽  
Vol 05 (01) ◽  
pp. 47-57
Author(s):  
Jin Wang ◽  
Fuli Wang ◽  
Mingzhong Li ◽  
Yingha Yang
Keyword(s):  
Mathematical Model ◽  
Process Control ◽  
Control Systems ◽  
Fuzzy Reasoning ◽  
Human Experience ◽  
Process Dynamics ◽  
Knowledge Based ◽  
Process Control Systems ◽  
Simulation Results ◽  
The Mathematical Model

A knowledge-based controller(KBC) used in process control systems is presented. It has three features: first, it does not need the mathematical model; secondly, the adjustable parameters of KBC have practical meanings, so they can be determined easily using human experience, and thirdly, the contribution of KBC to a controlled plant is separated into two parts: steady states contribution and transient contribution. A simple fuzzy reasoning is employed to tune the KBC parameters. The experimental and simulation results show that KBC is very effective especially when there are variations in the process dynamics.

Research of Fault Diagnosis of Coalmine Motor Bearings Based on Scale Adaptive Lifting Wavelet Transform

2013 ◽  
Vol 433-435 ◽  
pp. 494-498
Author(s):  
Jian Wu ◽  
Nan Wu ◽  
Feng Lv
Keyword(s):  
Wavelet Transform ◽  
Fault Diagnosis ◽  
Vibration Signal ◽  
Electrical Equipment ◽  
Variable Load ◽  
Mining Equipment ◽  
Lifting Wavelet Transform ◽  
Signal Characteristics ◽  
Fault Diagnosis System ◽  
Lifting Wavelet

For Rolling of the mine key equipment is damaged easily the problem which is machinery fault diagnosis,through the failure mechanism of the reload / variable load conditions and the weak fault signal characteristics of coal mine electrical equipment bearing are analyzed, a more refined analysis of the vibration signal and achieve coal mining equipment online monitoring and Intelligent Fault Diagnosis system is constructed directly by scale adaptive lifting wavelet transform

Simulaion on Strap-Down Inertial Navigation System Based on Simulink/M Programming Language

2013 ◽  
Vol 467 ◽  
pp. 584-589
Author(s):  
Yan Ling Liu ◽  
Xin Zhang
Keyword(s):  
Mathematical Model ◽  
Programming Language ◽  
Navigation System ◽  
Inertial Navigation System ◽  
Inertial Navigation ◽  
Calculated Data ◽  
Simulation Algorithm ◽  
Basic Principles ◽  
Data Error ◽  
The Mathematical Model

This paper presents the basic principles and algorithms of the trap-down Inertial Navigation System, and established the mathematical model and the simulation algorithm of the Inertial Navigation System based on Matlab /Simulink blocks combined with M Programming Language. After the simulation of the system, combined the calculated data, obtained the data error. The result proved that the model is correct and effective.

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