Search results for: Qian Suxiang
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Proceedings of the 31st Chinese Control Conference > 6798 - 6803
To satisfy the requirements of widely operational range of rotor speed, high nonlinearity and time variant characteristics in variable-speed wind turbines, a system with a fuzzy neural network controller based on mind evolutionary computation (MEC) optimization was designed. The controller combined the advantage of fast searching optimization of MEC and the advantage of not depending on controlled...
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Proceedings of the 31st Chinese Control Conference > 3187 - 3191
According to variable pitch wind characteristic and control requirements, and from the view of enhancing control system robustness, a fuzzy neural network sliding model control strategy is proposed for variable pitch control. Wind turbine model is established by fuzzy neural network and composed closed-loop control system, adaptive sliding mode controller based fuzzy neural network to reduce influence...
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Independent component analysis (ICA) is a powerful tool for redundancy reduction and nongaussian data analysis. And, artificial neural network (ANN), especially the self-organizing map (SOM) based on unsupervised learning is a kind of excellent method for pattern clustering and recognition. By combining ICA with ANN, a novel compound neural network for fault sources recognition was proposed. First,...
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2010 International Conference on Educational and Information Technology > 3 > V3-415 - V3-418
According to the popularization of higher education and the increasingly severe situation of undergraduate employment, the paper presents some education methods in the process of graduation design in order to let undergraduates, in the last phase of education, gradually adapt the future employment. Through enriching the sources and the implementation modes of graduation design and implementing the...
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Proceedings of the 29th Chinese Control Conference > 4073 - 4077
The increasing complexity of modern thermal power system, so that all the coupling between the subsystems and equipment, increasing correlation. A single device failure will cause a chain reaction of multiple devices, an increase of fault diagnosis more difficult. To identificate the system failure source for making up the fault diagnosis method based on single equipment of complex coupled system...
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Proceedings of the 29th Chinese Control Conference > 2977 - 2980
This paper aims at the air-lift compressor installed in a certain offshore oil and gas platform of East China Sea. Applying the modern state monitoring and fault diagnosing technologies, the theory of time frequency analysis is firstly introduced into its fault characteristic's extraction of air-lift compressor, and the intelligent forecasting method is also researched into its working state. Then,...
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The stable constraint conditions of cascade PID controller were obtained by generalized Hermite-Biehler theorem, and an optimal controller was researched. Through mind evolutionary algorithm(MEA), optimal cascade PID controller parameters were found. According to the defects lying in mind evolutionary algorithm, the niche technique is developed to improve MEA in this paper. The swarm is classified...
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Since its performance requirements of gun recoil mechanism have been continuously increased, this paper was explored and aimed at its dynamic model and parameter identification of a new type of gun magnetorheological recoil damper. Combining with its recoil resistance rule and stroke requirements of the 37mm caliber gun, a long-stroke magnetorheological recoil damper was developed. Using the developed...
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2009 Chinese Control and Decision Conference > 189 - 193
This paper presents the development of multilevel flow modeling (MFM)-a modeling method in means-end and part-whole way, for automatic real time fault diagnosis of power plant process failure. The MFM decomposes the complex plant process from the main goal to each component at multiple levels to represent the contribution of each component to the whole system to make clear how the main goal of the...
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Its primary purpose of this study is to provide a comprehensive investigation on the controllability of a magnetorheological (MR) gun recoil damper. Performances of MR damper under random load, mainly in the transportation applications, seismic protection in civil engineering and wind-rain-induced load in cable bridge, have been well investigated by many researchers. However, little research has been...
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Many investigations have been done on low velocity and frequency applications of MR devices. The main purpose of this paper was to analyze the behaviour of the long-stroke MR damper under impact load and establish its dynamic model. Their relationships between some important designed parameters have been investigated in detail. According to the simulation result, a novel large-scale single-ended MR...
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Different heat effects will arise due to failures of oil-immersed transformer, thus lead to abnormal temperature rise. Based on the theoretical analysis on temperature-field of transformer, the solid model of large oil immersed transformer was built using SolidWorks, and the temperature-fields are analyzed in this paper. Three-dimensional temperature-fields distribution of transformer are obtained...
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A model algorithm based on multilevel flow model (MFM) has been suggested for applying artificial immune network in modeling complex industrial process. Through an analysis of the functions in multilevel flow model, the relative antibody has been designed. Using mass flow and energy flow of multilevel flow model, a stimulation propagation path of artificial immune network is built up. Based on input...
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It has been a more complex problem for water quality assessment. And its aim is to well and truly evaluate its degree of pollution for bodies of water, which will be easy to provide some principled projects and criterions for water resource's protection and their integration application. So, it has been widely applied into water quality assessment. SVM and directed acyclic graph support vector machine...
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With the rapid development of structure design and the applications of high and new technology, more and more impact issues have occurred in engineering applications, especially in weapon system. This paper was explored and aimed at its dynamic character and vibration control of magnetorheological damper subjected to impact load. In order to evaluate its controllability of the designed long-stroke...
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The development direction of techniques for large-scale transformer in future is high-capacity and extreme high voltage. And its structure is becoming more and more complex; its manufacturing cost is becoming more and more expensive. Therefore, it is necessary to design and develop a state monitoring and fault diagnosis system for large-scale transformer and improve the reliability and accuracy of...
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Considering the requirement of high performance of system, a fuzzy internal model controller based on mind evolutionary computation is designed. The optimal parameters of the processes model are quickly obtained online by mind evolutionary computation, which are been sent to fuzzy internal model controller for accurate compensation. The controller was used to deal with large time-delay and time-varying...
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The shape control and active vibration control for the laminated shell bonded with piezoelectric sensors and actuators is researched in this paper. A set of vibration control equations, sensing equations and actuating equations are derived through using the finite element method and the modal theory for the piezoelectric laminated shell, then the model are converted into form of state space and transfer...
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Based on the knowledge about today's systems of water quality auto-monitoring and managing at home and abroad, a wireless monitoring system of water quality based on GPRS has been designed in this paper. And the model for water quality state recognition is established by BP neutral network based on water monitoring data. The software for wireless monitoring and assessment system of water quality is...
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This research aims at the dynamic response and the active vibration control with piezoelectric self-sensing actuators for the cantilever beam under a moving mass. After analyzing the vibration characteristics of the beam under a moving mass, the active vibration control technology is introduced to suppress its vibration. The dynamic response model and state space model for active vibration control...
