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Practical integrated navigation fault detection.algorithm based on sequential hypothesis testing

Journal of Systems Engineering and Electronics 2011年第1期22卷 146-149页

作者： Feng Yang Cheng Cheng Quan Pan Gongyuan Zhang Department of Automation Northwestern Polytechnical University Xi'an 710072 R R. China

In detecting system fault algorithms,the false alarm rate and undectect rate generated by residual Chi-square test can affect the stability of *** paper proposes a fault detection.algorithm based on sequential residual Chi-square test and applies to fault detection.of an integrated navigation *** simulation result shows that the algorithm can accurately detect the fault information of global positioning system（GPS）,eliminate the influence of false alarm and missed detection.on filter,and enhance fault tolerance of integrated navigation systems.

关键词： residual Chi-square test integrated navigation fault detection.

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Hybrid Model Predictive Control and fault detection.of Wind Energy Conversion System Based on Mixed Logical Dynamic

Hybrid Model Predictive Control and Fault Detection of Wind ...

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第26届中国控制与决策会议

作者： Shi Yun-tao Qiao Shu-juan Hou Yan-jiao Li Zhi-jun Sun De-hui Key Lab of Field Bus and Automation of Beijing North China University of Technology

ISBN: (纸本)9781479937066

The main contribution of this paper is the development of hybrid model predictive control and fault detection.strategy for wind energy conversion system（WECS） based on mixed logic dynamic（MLD） model framework. The MLD model for WECS including multiple work regions is established. Also the hybrid model predictive control method based on the MLD model of WECS is adopted to implement the variable speed constant frequency control and variable pitch control for the optimal power tracking. The mixed logic dynamic fault（MLDF） model is also established for generator speed sensor fault and the pitch actuator fault of WECS. Moving horizon estimation（MHE） method is applied to estimate the fault states of WECS based on MLDF model of WECS. The performance and the efficiency of the proposed approaches validated via simulations.

关键词： Wind Energy Convert System Hybrid Model Predictive Control Moving Horizon Estimation fault detection.

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Wavelet transform and its applicationto control system fault detection

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International Journal of Plant Engineering and Management 1999年第Z1期4卷 524-529页

作者： GAO Lei WANG Zhi-sheng XU De-min(College of Marine Engineering, Northwestern Polytechnical University, Xi’an, 710072, P.RChina)

Wavelet analysis theory is a new theory developed in recent years, it is a new timefrequency localization method. As its analyzing precision can be changed and focused to anydetail of the analyzed signal., it is very useful to study unstationary signals. In this paper wemainly study the wavelet theory a,of its application in control systems. Furthermore, we use it todetect the fault of an underwater vehicle 's direction angle, and attained excellent results from thesimulation.

关键词： wavelet transforms unstationary signals fault detection.

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fault tolerant navigation method for satellite based on information fusion and unscented Kalman filter

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Journal of Systems Engineering and Electronics 2010年第4期21卷 682-687页

作者： Dan Li Jianye Liu Li Qiao Zhi Xiong School of Electrical Engineering and Information Anhui University of Technology Maanshan 243002 P. R. China Navigation Research Center Nanjing University of Aeronautics and Astronautics Nanjing 210016 P. R. China

An effective autonomous navigation system for the integration of star sensor,infrared horizon sensor,magnetometer,radar altimeter and ultraviolet sensor is *** requirements of the integrated navigation system manager make optimum use of the various navigation sensors and allow rapid fault detection.isolation and *** normal full fusion feedback method of federated unscented Kalman filter（UKF） cannot meet the needs of *** a no-reset feedback federated Kalman filter architecture is developed and used in the autonomous navigation *** minimal skew sigma points are chosen to improve the calculation *** results are presented to demonstrate the advantages of the *** advantages include improved failure detection.and correction,improved computational efficiency,and ***,its＇ accuracy is higher than that of the full fusion feedback method.

关键词： autonomous navigation information fusion unscented Kalman filter(UKF) fault detection.

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On a fault detection.System based on Neuro-Fuzzy Fusion Method

On a Fault Detection System based on Neuro-Fuzzy Fusion Meth...

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2010 Chinese Control and Decision Conference

作者： Ye XU and Zhuo Wang College of Information Science and Engineering,Shenyang Ligong University,Shenyang 110168,China

＜正＞A fault detection.system of a power plant by means of neuro-fuzzy fusion method is discussed in this *** temperature together with temperature variations of refrigerant at the entrance and exit of hydrogenerator group are firstly monitored by temperature *** fuzzy system of the aforementioned variables and their membership functions,next,are designed according to expertise knowledge ***,a neuron-fuzzy fusion model is generated by merge the fuzzy system into a neural networks fusion model,and it is proved to be efficient with a correctness ratio of 91%by testing experiments on around one third of overall samples.

关键词： neuro-fuzzy fusion fuzzy logic membership function fault detection.

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System time offset based RAIM in combined GPS/Beidou navigation system

System time offset based RAIM in combined GPS/Beidou navigat...

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第三届中国卫星导航学术年会

作者： XU LongXia1,2,3*1, LI XiaoHui1,2, XUE YanRong1,2,3, CAI ChengLin4& GUO MeiJun1,3 1National Time Service Center, Chinese Academy of Sciences, Xi’an 710600, China 2Key Laboratory of Precision Navigation and Timing Technology, Chinese Academy of Sciences, Xi’an 710600, China 3Graduate University of Chinese Academy of Sciences, Beijing 100039, China 4Guilin University of Electronic Technology, Guilin, 541004, China

Compatibility and interoperability of GNSS （Global Navigation Satellite System） are becoming the main trend of future navigation. However, each navigation system has a time scale. When users positioning with not only one system, the time offset between them must be considered. There are several ways to acquire system time offsets. By adding unknown variables in the combined position equation to solve this variable is the commonly used way. For positioning with multi-constellations, system time offsets are some kind of burden which must be taken into account. This paper takes full use of the obtained offsets and proposes a new fault detection.method for RAIM （Receiver Autonomous Integrity Monitoring）. Simulations are made to estimate the ability of this new method. This new method takes the high stability of system time offsets of GPS/Beidou system and applies it to assistant fault detection. This method has no additional requirements for navigation system and is fit for applied in receivers. It can be expected this method will be one means of RAIM for Beidou navigation system when integrated with other GNSS in future.

关键词： Compatibility and Interoperability Time Offset Receiver Autonomous Integrity Monitoring fault detection.

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A Generalized Phenomenological Model to Simulate Complex Chemical Processes

A Generalized Phenomenological Model to Simulate Complex Che...

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第一届国际测量仪器与测试自动化学术会议

作者： Zheng Rao Wang Kuisheng Wang Yun ( Beijing University of Chemical Technology Beijing 100029 China) ( Beijing University of Chinese Medicine Beijing 100102 China)

＜正＞The complex chemical processes are composed of many different nonlinear sub-systems, possibly including continual dynamical systems, discrete events dynamic systems and hybrid dynamical systems. The analytical modeling and simulation of complex chemical processes is time-consuming and the model-based fault detection.methodology does not work well on these systems. In order to provide a practical modeling method in the simulation and the fault detection.of complex systems , a generalized system and its phenomenological model were proposed in the paper. The fault detection.method based on the phenomenological model is explored. Using TE process as example, the modeling capability of the method is analyzed. The results indicated that the simple phenomenological model could be used in the simulation and fault detection.of TE process in some specific conditions.

关键词： Complex chemical process phenomenological model fault detection.

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