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中国计算力学大会2014暨第三届钱令希计算力学奖颁奖大会

作者：曹启武陈琦商中新 college of aeronautical Engineering civil aviation university of china Sino-European Institute of aviation Engineering civil aviation university of china Shanghai aviation Industry (Group) Company-Information Centre

By using the scaling functions B-spline wavelet on the interval(BSWI20)as the interpolation function and H-R generalized variational principle for the hybrid element construction,stress element formula of a three-dimension eight-node B-spline is derived,hypothetical stress field and matrix of governing equations which can be applied to different boundary conditions are also given in this *** addition,a composite laminated plate model is *** deflection of the board center in each layer and the stress distribution along the thickness are calculated and analyzed when exposed to uniform *** examples show that in the composite laminate stress analysis,accurate results can be obtained with a relatively low mesh density by using the wavelet hybrid stress element.

关键词： BSWI20 composite laminate hybrid stress element

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Aircraft Optimal Separation Allocation Based on Global Optimization Algorithm

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Transactions of Nanjing university of Aeronautics and Astronautics 2022年第6期39卷 707-720页

作者： REN Xuanming TANG Xinmin college of civil aviation Nanjing University of Aeronautics and AstronauticsNanjing 211106P.R.China college of Transportation Science and Engineering Civil Aviation University of ChinaTianjin 300300P.R.China

A dynamic programming-sequential quadratic programming(DP-SQP)combined algorithm is proposed to address the problem that the traditional continuous control method has high computational complexity and is easy to fall into local optimal *** solve the globally optimal control law sequence,we use the dynamic programming algorithm to discretize the separation control decision-making process into a series of sub-stages based on the time characteristics of the separation allocation model,and recursion from the end stage to the initial *** sequential quadratic programming algorithm is then used to solve the optimal return function and the optimal control law for each *** simulations of the combined algorithm and the traditional algorithm are designed to validate the superiority of the combined ***-following and cross-conflict simulation examples are created to demonstrate the combined algorithm’s adaptability to various conflict *** simulation results demonstrate the separation deploy strategy’s effectiveness,efficiency,and adaptability.

关键词： optimal separation allocation sequential quadratic programming dynamic programming globally optimal control optimal control law

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Research method of circuit fault diagnosis based on FCM

Research method of circuit fault diagnosis based on FCM

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2009年中国智能自动化会议

作者：周德新李伟 college of aeronautical automationcivil aviation university of china

Using fuzzy C cluster mean(FCM),fuzzy theory and neural network,a fault diagnosis method was proposed,which was based on fuzzy C-means clustering algorithm of neural network that was applied in non-linear analog circuits and in diagnoses the ARNIC 429 reception circuit of aviation aircraft *** C cluster algorithm can make the amount of the fuzzy rule automatically and can create an initial fuzzy rule database of fault diagnosis.A type of fuzzy neural network and a fault tree were *** algorithm avoids the disadvantage that gets into the part of optimum circumstance.A validate application was implemented,which proves that the method is ***,the method is superior to the traditional methods in fault diagnosis,and the efficiency is heavily improved.

关键词： C cluster algorithm neural network analog circuit fault diagnosis

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Research on the Interval Estimation of Aircraft Fuel Consumption based on the Data Distribution Characteristics

Research on the Interval Estimation of Aircraft Fuel Consump...

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第32届中国控制与决策会议

作者： Xi Wang Jingjie Chen college of Computer Science and Technology Civil Aviation University of China Research Centre for Environment and Sustainable Development of civil aviation Administration of china Civil Aviation University of China college of Electronic Information & automation Civil Aviation University of China National Engineering Laboratory for Integrated Traffic Data Application Technology Civil Aviation University of China

The interval estimation of aircraft fuel consumption is an important basis for airline system planning and operation *** order to solve the problem that the dispersion characteristics of actual payloads,itinerary difference in traditional fuel consumption estimation,and the uncertainty of operating environment and pilot accustomization and other factors are not fully considered,which affects the overall interval estimation results,this paper proposed an aircraft fuel consumption interval estimation method based on data deviation and density distribution under-sampling(US-D-DD).For all itineraries of the same type of aircraft,considering the deviation and density distribution of the data,the relevance vector machine(RVM) is used to establish the aircraft fuel consumption interval estimation model,and the aircraft fuel consumption interval estimation results with a certain level of confidence are ***,the comprehensive evaluation index is given,and the results before and after considering the data distribution characteristics are *** experimental results show that the method achieves better interval estimation effect and verifies its effectiveness.

关键词： Aircraft Fuel Consumption Interval Estimation Deviation Density Distribution

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Freshness constraints of an age of information based event-triggered Kalman consensus filter algorithm over a wireless sensor network

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Frontiers of Information Technology & Electronic Engineering 2021年第1期22卷 51-67页

作者： Rui WANG Yahui LI Hui SUN Youmin ZHANG college of Information Engineering and automation Civil Aviation University of ChinaTianjin 300300China Department of Mechanical Industrial and Aerospace EngineeringConcordia UniversityMontrealQuebec H3G 1M8Canada

This paper presents the design of a new event-triggered Kalman consensus filter(ET-KCF)algorithm for use over a wireless sensor network(WSN).This algorithm is based on information freshness,which is calculated as the age of information(Aol)of the sampled *** proposed algorithm integrates the traditional event-triggered mechanism,information freshness calculation method,and Kalman consensus filter(KCF)algorithm to estimate the concentrations of pollutants in the aircraft more *** proposed method also considers the influence of data packet loss and the aircraft's loss of communication path over the WSN,and presents an Aol-freshness-based threshold selection method for the ET-KCF algorithm,which compares the packet Aol to the minimum average Aol of the *** method can obviously reduce the energy consumption because the transmission of expired information is ***,the convergence of the algorithm is proved using the Lyapunov stability theory and matrix *** results show that this algorithm has better fault tolerance compared to the existing KCF and lower power consumption than other ET-KCFs.

关键词： Distributed Kalman consensus filter(KCF) Event-triggered mechanism Age of information(Aol) Stability analysis Energy optimization

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Modeling and Algorithm Application of Weapon Assignment System

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Transactions of Nanjing university of Aeronautics and Astronautics 2014年第6期31卷 693-700页

作者：王玉惠陈哨东韩占朋王文敬张洪波 college of automation Engineering Nanjing University of Aeronautics and Astronautics Science and Technology on Electro-Optic Control Laboratory No.650 Institute AVIC Jiangxi Hongdu Aviation Group Co.Ltd.

In order to improve weapon assignment(WA)accuracy in real scenario,an artificial neural network(ANN)model is built to calculate real-time weapon kill *** the WA characteristic,each input representing one assessment index should be normalized ***,the modified WA model is oriented from constant value to dynamic *** an improved invasive weed optimization algorithm is applied to solve the WA *** search process,local search is used to improve the initial population,and seed reproduction is redefined to guarantee the mutation from multipoint to single *** addition,the idea of vaccination and immune selection in biology is added into optimization ***,simulation results verify the model′s rationality and effectiveness of the proposed algorithm.

关键词： intelligent control weapon assignment(WA) modeling artificial neural network(ANN) invasive weed optimization(IWO)

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Fault Diagnosis Strategy of Electro-Mechanical Flight Actuator Using Fuzzy Disturbance Observer

Fault Diagnosis Strategy of Electro-Mechanical Flight Actuat...

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第40届中国控制会议

作者： Zhenshu Yang Qi Mao Likai Zhu Zhenjiang Key Laboratory of UAV Application Technology Aeronautical Engineering InstituteJiangsu Aviation Technical College Key Laboratory of civil aviation Aircraft Airworthiness Certification Technology Civil Aviation University of China

In this paper,we study the fault diagnosis problem of electro-mechanical flight actuator(EMFA) in the presence of nonlinear terms and unknown disturbances,which leads to a new fault diagnosis method based on fuzzy disturbance ***,the model combined with nonlinear terms and synthesized disturbances is established for ***,the fuzzy logic system is employed to develop a disturbance observer thereby generating the disturbance estimations for the *** that,the stability analysis illustrates that the disturbance observer error can converge to a small range around *** estimation errors can be used in the fault diagnosis process and then applied to detect whether the fault has ***,the numerical simulations and discussions are carried out to demonstrate that the effectiveness of the proposed method,which shows that the designed detect strategy can reduce the false alarm rate of fault diagnosis.

关键词： electro-mechanical flight actuator(EMFA) fault diagnosis fuzzy disturbance observer.(FDO) false alarm rate

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A Modulation Method with Unfixed Switching Frequency Based on Output Power for Wind Power Converter

A Modulation Method with Unfixed Switching Frequency Based o...

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作者： Jing-yang HUANG Gang ZHANG Wei-jun PAN Air Traffic Management college Civil Aviation Flight University of China School of automation Engineering the University of Electric and Science Technology of China

The wind turbine power system is being widely used and heavily connected to the utility grid, and the total harmonic distortion（THD） is one of the major evaluation indicators of electric power quality. The characteristics of the grid-connected wind converter harmonic with variable power loading are analyzed in this paper, and a software method of the variable switching frequency based on the output power of wind power converter is investigated to improve the grid-connecting harmonic considering the widely power loading. The method is verified on a three-level Neutral-Point-Clamped converter with Sinusoidal Pulse Width Modulation through simulations at last. And the results show that the THD is improved clearly and meanwhile the power loss and junction temperature are improved.

关键词： Harmonic THD Wind power converter Switching frequency Power loss

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Adaptive robust control for Stochastic Nonlinear Systems with matched conditions

Adaptive robust control for Stochastic Nonlinear Systems wit...

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第36届中国控制会议

作者： Guifang Li Ye-hwa Chen college of civil aviation Nanjing University of Aeronautics and Astronautics The George W.Woodruff School of Mechanical Engineering Georgia Institute of Technology

ISBN: (纸本)9781538629185

We consider a class of stochastic nonlinear uncertain system containing uncertainty which satisfies matched conditions. Its zero state is asymptotically stable. Based on the bound information of these uncertainties, the adaptive robust controller is proposed in order to guarantee that the responses of the closed-loop systems are globally bounded in probability. A numerical example is given to illustrate the effectiveness of the proposed method.

关键词： Stochastic nonlinear systems uncertainty adaptive control globally bounded in probability

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A Numerical Research on Diverse Cratered Film Cooling Hole Geometries

A Numerical Research on Diverse Cratered Film Cooling Hole G...

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高等学校工程热物理第二十届全国学术会议

作者： Weijia QIAN 张宗卫 college of aeronautical Engineering Civil Aviation University of China 中国民航大学航空工程学院

The goal of this research is to investigate cratered hole geometries on film cooling *** kinds of cratered holes,namely,the concentric crater,the circular crater,the downstream offset crater,the upstream offset crater,and the direct crater are being studied along with the conventional flush *** craters has the same depth of 0.5 hole *** numerical simulation with CFX at a single blowing ratio of 0.5 and Reynold number of 11000,we analyze and compare the performance and behavior of five kinds of cratered holes with the conventional cylindrical *** simulation employs k-εturbulent model and wall *** cooling effectiveness is achieved for all *** all cases,concentric cratered hole perform the best which increasesηaver by 64%at X/D=*** cratered holes appear some performance improvement compared to the baseline *** cratered holes,film lateral convergence and streamwise attaching performance was both enhanced owing to the expansional configuration of the crater and the consequent backflow region.

关键词： cratered hole film cooling cooling effectiveness

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