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Outlier-tolerance is the important part to the safety studies of technology process, and it is also one of the key technologies that can guarantee the operation safety of the dynamic system. Firstly, how to realize the safe and reliable processing of fault and outliers is discussed. This paper analyzes the significant differences that exist in the three kinds fault tolerance research branches which...
The necessary conditions for detecting and localizing the faults in control systems with a complicated structure are suggested. It is shown that the topological conditions do not depend on the class of operators of the dynamic model of the control system and are verified using path search algorithms in directed graphs. The fault localization algorithm is reduced to the construction and analysis of...
The necessary conditions for the diagnosability of control systems with a complex structure are given. It is shown that the topological conditions for detectability and localization of the fault signal do not depend on the class of operators of the dynamic model of the control system and are checked by using path search algorithms in directed graphs.
The article presents the development of fault-tolerant control system for the so-called evaporator, which is one of the major subsystems of the nickel production process. Model-based approach was applied to the possible failures detection and localization. Topological analysis was performed to detect potentially possible relationships symptom-diagnosis. Diagnostic features (DF) for subsystems were...
A fault knowledge base management platform which uses the method of ADO.NET and directed graph is presented in this paper in order to deal with prognosis health management for electrical control system. At first, knowledge base is designed according to structure and function of the system, with hierarchical framework is taken into consideration to represent the relationship of electrical apparatus...
Inverter current limiting in islanded networks during unbalanced faults can cause voltage distortion. By using the control system to emulate a parallel impedance, this distortion can be avoided whilst current control is maintained and fault current is delivered to the fault. Experimental results from a 10kVA inverter system are provided to verify the theoretical analysis that has been developed.
In the low-cost Unmanned Aerial Vehicle (UAV), in order to ensure the security of the system and reduce costs, degrade control system under the sensor fault state is becoming more and more highly regarded. Degrade control adopted less sensor configuration to achieve the desired control functions. In the low-cost prototype UAV research and development process, degrade control not only can reduce system...
The paper presents the structure and usage mode for an integrated fault-diagnosis and control system for power system equipment. The fault diagnosis and control system allows on-line analysis on a desktop application, a Web application and off-line analysis for determining the transformer faults and remedies based on certain symptoms observed on the equipment and their comparison with the survey results...
Protection and control systems play important roles in power system operation and for the reliability and security of supply. This paper presents main results from a study of incorrect operations of protection and control systems on the voltage levels 1 - 420 kV in Norway, comprising mainly false and missing operations. The statistics for the period 1999 - 2003 show that false or unwanted operation...
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