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Weighted Multi-sensor Data Level Fusion Method of Vibration signal based on Correlation Function

Chinese Journal of Mechanical Engineering 2011年第5期24卷 899-904页

作者： bIN Guangfu JIANG Zhinong LI Xuejun dhillon b s Diagnosis and self-recovery Engineering Research Center Beijing University of Chemical Technology Beijing 100029 China Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment Hunan University of Science and Technology Xiangtan 411201 China Department of Mechanical Engineering University of Ottawa 161 Louis Pasteur Ottawa K1B 6N5 Canada

As the differences of sensor＇s precision and some random factors are difficult to control,the actual measurement signals are far from the target signals that affect the reliability and precision of rotating machinery fault *** traditional signal processing methods,such as classical inference and weighted averaging algorithm usually lack dynamic adaptability that is easy for trends to cause the faults to be misjudged or left *** enhance the measuring veracity and precision of vibration signal in rotary machine multi-sensor vibration signal fault diagnosis,a novel data level fusion approach is presented on the basis of correlation function analysis to fast determine the weighted value of multi-sensor vibration *** approach doesn＇t require knowing the prior information about sensors,and the weighted value of sensors can be confirmed depending on the correlation measure of real-time data tested in the data level fusion *** gives greater weighted value to the greater correlation measure of sensor signals,and vice *** approach can effectively suppress large errors and even can still fuse data in the case of sensor failures because it takes full advantage of sensor＇s own-information to determine the weighted ***,it has good performance of anti-jamming due to the correlation measures between noise and effective signals are usually *** the simulation of typical signal collected from multi-sensors,the comparative analysis of dynamic adaptability and fault tolerance between the proposed approach and traditional weighted averaging approach is ***,the rotor dynamics and integrated fault simulator is taken as an example to verify the feasibility and advantages of the proposed approach,it is shown that the multi-sensor data level fusion based on correlation function weighted approach is better than the traditional weighted average approach with respect to fusion precision and dynamic ***,the approac

关键词： vibration signal multi-sensor data level fusion correlation function weighted value

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一种光纤光栅传感实验仪的可靠性分析(英文)

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仪器仪表学报 2008年第4期29卷 673-678页

作者：朱萍玉 dhillon b.s. 李学军宾光富湖南科技大学机械设备健康维护湖南省重点实验室渥太华大学机械工程系

光纤光栅作为一种传感单元可以测试应变、温度和压力等物理量。近年来,可用于光纤光栅信号解调的技术和仪器相继出现,并在不同的场合得到了很好的应用。但由于制造、安装和操作等原因,这些仪器的可靠性问题也开始引起不同程度的关注。... 详细信息

光纤光栅作为一种传感单元可以测试应变、温度和压力等物理量。近年来,可用于光纤光栅信号解调的技术和仪器相继出现,并在不同的场合得到了很好的应用。但由于制造、安装和操作等原因,这些仪器的可靠性问题也开始引起不同程度的关注。仪器的可靠性分析是其设计过程中不可缺少的重要环节之一。以一种基于匹配解调技术的准分布式光纤光栅解调仪为例,介绍了该仪器的基本组成和原理;采用故障树法从机械和光电器件的可能出现的如光纤光栅脆断、螺钉松动和脱焊等故障和失效形式出发,根据光路配置、电路以及机械结构分析了可能的故障模式,计算了可靠性。结论有利于对这类仪器的故障诊断和维护。

关键词：可靠性分析光纤传感器故障树光纤光栅

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The main projects and development status of noise forecasting and controlling on working face in coal mine

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Journal of Coal science & Engineering(China) 2010年第2期16卷 198-205页

作者： PENG You-duo GUO Ying-fu WU Li-tao LI Xin XIE Wei-hua dhillon b s Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment Hunan University of Science and Technology Xiangtan 411201 China Department of Mechanical Engineering of University of Ottawa Canada ON K1N 6N5 Canada

Noise from the machine on coal working face seriously influenced the miners' physical and mental health, and also, due to the noise, there may be a major hidden danger in safety from accidents as all safety warning signals may be masked by the noise. This paper summarized the features of mine environmental noise on working face, such as the variety of noise sources, the continuity of high intensity and slow attenuation in narrow space, *** main projects about noise forecasting and controlling on working face was emphatically expounded;the development status about mines machinery noise mechanism and environmental noise acoustic characteristics of space-time of these main research topics were also introduced.

关键词： coal mine working face environmental noise main projects development status

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Fatigue reliability analysis of kiln welded shell

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Engineering sciences 2010年第4期8卷 52-57页

作者： Li Xuejun shen Yiping dhillon b. s. Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment Hunan University of Science and Technology Xiangtan Hunan 411201 China Department of Mechanical Engineering University of Ottawa Ontario Ottawa K1N6N5 Canada

This paper presents a probabilistic reliability method for the welded shell during crack growth. The crack growth model incorporated with a failure assessment diagram（FAD） , which can provides a better estimation of the critical crack length, is developed to describe fatigue failure. All variables for particular welded joints of the shell are studied. Among them, the stress variables are based on the calculated stress by using the finite element （FE） code ANsYs. Fatigue reliability analysis of the welded shell is performed by using the Monte Carlo simulation method. The failure probability curve of the example kiln is significantly useful to determine the repair schedule of shell cracks.

关键词： fatigue reliability welded shell crack growth FAD Monte Carlo ANsYs

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系统可靠度工程：设计与操作

系统可靠度工程：设计与操作

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1987年

作者：迪隆（ＤＨＩＬＬＯＮＢ．Ｓ．）赵浡霖译

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印度的医学相关工作者发放口服米索前列醇对预防产后出血的研究

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世界核心医学期刊文摘（妇产科学分册） 2006年第5期2卷 56-57页

作者： Chandhiok N dhillon b.s Datey s. 柳蕴 Division of Reproductive Health and Nutrition Indian Council of Medical Research AnsariNagar New Delhi India

To study whether paramedical workers from rural primary health centers in India are able to administer oral misoprostol and actively manage the third stage of labor to prevent postpartum hemorrhage (PPH). Method: Cluster randomization was used to enroll 1200 women at 30 peripheral health centers from 5 states in India, 600 forming the study’s intervention group (active management of the third stage of labor with 600 μ g of oral misoprostol) and 600 forming the comparison group (in which the current government guidelines for the prevention of PPH were followed). The primary outcome was blood loss after delivery, which was measured using a calibrated blood collection drape. Results: Age, literacy level, occupation, and gravidity were similar in the 2 groups. More than 70% of women in both groups had moderate anemia (hemoglobin level s followed instructions in almost all deliveries in the intervention group (99% ). There was a significant reduction in duration of the third stage of labor (7.9 ± 4.2 min vs. 10.9 ± 4.3 min; p blood loss after delivery (100 mL vs. 200 mL; p s observed ( both groups. A greater number of women had moderate to severe shivering (12.7% vs. 0.5% ) and a temperature higher than 38° C (9.7% vs. 4.3% ) in the intervention group, which was statistically significant. Conclusion: simple interventions can be easily implemented in rural health care settings to reduce the blood loss during labor. This finding has significant implications for developing countries, in which the prevalence of anemia is high.

关键词：预防产后出血第三产程失血量保健中心干预组乡村基层保健机构随机法有中文化水平

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REAL CODED GENETIC ALGORITHM FOR sTOCHAsTIC HYDROTHERMAL GENERATION sCHEDULING

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Journal of systems science and systems Engineering 2011年第1期20卷 87-109页

作者： Jarnail s.dhillon J.s.dhillon D.P.KOTHARI G.Z.s.College of Engineering and Technology sant Longowal Institute of Engineering and Technology Vindhya Institute of Technology and science

The intent of this paper is to schedule short-term hydrothermal system probabilistically considering stochastic operating cost curves for thermal power generation units and uncertainties in load demand and reservoir water inflows. Therefore, the stochastic multi-objective hydrothermal generation scheduling problem is formulated with explicit recognition of uncertainties in the system production cost coefficients and system load, which are treated as random variable. Fuzzy methodology has been exploited for solving a decision making problem involving multiplicity of objectives and selection criterion for best compromised solution. A real-coded genetic algorithm with arithmetic-average-bound-blend crossover and wavelet mutation operator is applied to solve short-term variable-head hydrothermal scheduling problem. Initial feasible solution has been obtained by implementing the random heuristic search. The search is performed within the operating generation limits. Equality constraints that satisfy the demand during each time interval are considered by introducing a slack thermal generating unit for each time interval. Whereas the equality constraint which satisfies the consumption of available water to its full extent for the whole scheduling period is considered by introducing slack hydro generating unit for a particular time interval. Operating limit violation by slack hydro and slack thermal generating unit is taken care using exterior penalty method. The effectiveness of the proposed method is demonstrated on two sample systems.

关键词： stochastic multi-objective optimization real-coded genetic algorithm fuzzy set economicload dispatch

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Multiaxial fatigue life prediction of kiln roller under axis line deflection

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Applied Mathematics and Mechanics(English Edition) 2010年第2期31卷 205-214页

作者：沈意平王送来李学军 b.s.dhillon Hunan Provincial Key Laboratory of Health Maintenance for Mechanical Equipment Hunan University of Science and Technology Department of Mechanical Engineering University of Ottawa

This paper investigates the multiaxial fatigue life of the roller in rolling contact with wheels with respect to axis line deflection. The multiaxial fatigue criteria proposed by Wang and brown, together with the ralnflow counting method and Miner- Palmgren＇s rule, are applied to the cumulative damage estimation and life prediction. As the axis line deflection of overlong kilns generally results in asymmetric load distribution on each roller, the load ratio is introduced to describe the deflection for quantitative stress analyses. The stress analyses are performed within the finite element code ANsYs. The tangential friction stress is calculated in terms ：of the condition of the rolling contact area. by taking one roller as an example, the plotted fatigue life versus load ratio curve discovers how the axis line deflection affects the fatigue life. This study is significant to prevent the fatigue failure of the roller and can provide basis to adjust and optimize the axis line of the rotary kiln.

关键词： multiaxial fatigue fatigue life axis. line deflection rolling contact

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FUZZY sATIsFYING INTERACTIVE MULTIObJECTIVE THERMAL POWER DIsPATCH： sWT APPROACH

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Journal of systems science and systems Engineering 2007年第1期16卷 88-106页

作者： Lakhwinder sINGH J.s. dhillon baba banda singh bahadur Engineering College Fatehgarh Sahib- 140407 Punjab India sant Longowal Institute of Engineering & Technology Longowal - 148 106 Punjab India

In multiobjective optimization, trade-off analysis plays an important role in determining most preferred solution. This paper presents an explicit interactive trade-off analysis based on the surrogate worth trade-off function to determine the best compromised solution. In the multiobjective framework thermal power dispatch problem is undertaken in which four objectives viz. cost, NOx emission, sOx emission and COx emission are minimized simultaneously. The interactive process is implemented using a weighting method by regulating the relative weights of objectives in systematic manner. Hence the weighting method facilitates to simulate the trade-offrelation between the conflicting objectives in non-inferior domain. Exploiting fuzzy decision making theory to access the indifference band, interaction with the decision maker is obtained via surrogate worth trade-off （sWT） functions of the objectives. The surrogate worth trade-off functions are constructed in the functional space and then transformed into the decision space, so the surrogate worth trade-off functions of objectives relate the decision maker＇s preferences to non-inferior solutions through optimal weight patterns. The optimal solution of thermal power dispatch problem is obtained by considering real and reactive power losses. Decoupled load flow analysis is performed to find the transmission losses. The validity of the proposed method is demonstrated on 11-bus, 17-lines IEEE system, comprising of three generators.

关键词： Multiobjective thermal power dispatch weighting method fuzzy membership function non-inferior solutions sWT functions

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bEsT WEIGHT PATTERN EVALUATION bAsED sECURITY CONsTRAINED POWER DIsPATCH ALGORITHM

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Journal of systems science and systems Engineering 2007年第3期16卷 287-307页

This paper presents a methodology which determines the allocation of power demand among the committed generating units while minimizes number of objectives as well as meets physical and technological system constraints. The procedure considers two decoupled problems based upon the dependency of their goals on either active power or reactive power generation. both the problems have been solved sequentially to achieve optimal allocation of active and reactive power generation while minimizes operating cost, gaseous pollutants emission objectives and active power transmission loss with consideration of system operating constraints along with generators prohibited operating zones and transmission line flow limits. The active and reactive power line flows are obtained with the help of generalized generation shift distribution factors （GGDF） and generalized Z-bus distribution factors （GZbDF）, respectively. First problem is solved in multi-objective framework in which the best weights assigned to objectives are determined while employing weighting method and in second problem, active power loss of the system is minimized subject to system constraints. The validity of the proposed method is demonstrated on 30-bus IEEE power system.

关键词： Multi-objective optimization best weight pattern evaluation fuzzy decision making membership function generalized generation shift distribution factors generalised Z-bus distribution factors

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