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Intention Estimation of Adversarial Spatial Target Based on Fuzzy Inference

Intelligent Automation & Soft Computing 2023年第3期35卷 3627-3639页

作者： Wenjia Xiang Xiaoyu Li Zirui He Chenjing Su Wangchi Cheng Chao Lu Shan Yang School of Information and Software Engineering University of Electronic Science and Technology of ChinaChengdu610054China Institute of Logistics Science and Technology Beijing100166China Science and Technology on Altitude Simulation Laboratory Sichuan Gas Turbine Establishment Aero Engine Corporation of ChinaMianyang621000China Department of Chemistry Physics and Atmospheric SciencesJackson State UniversityJacksonMS 39217USA

Estimating the intention of space objects plays an important role in air-craft design,aviation safety,military and otherﬁelds,and is an important refer-ence basis for air situation analysis and command *** paper studies an intention estimation method based on fuzzy theory,combining prob-ability to calculate the intention between two *** method takes a space object as the origin of coordinates,observes the target’s distance,speed,relative heading angle,altitude difference,steering trend and etc.,then introduces the spe-ciﬁc calculation methods of these *** calculation,values are input into the fuzzy inference model,andﬁnally the action intention of the target is obtained through the fuzzy rule table and historical weighted ***-iﬁed by simulation experiment,the target intention inferred by this method is roughly the same as the actual behavior of the target,which proves that the meth-od for identifying the target intention is effective.

关键词： Intension estimation motion parameters calculation fuzzy inference fuzzy rule table historical weighted probability

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CFD OPTIMUM DESIGN OF SUPERSONIC EJECTOR SYSTEM STRUCTURE OF TEST CELL 32

CFD OPTIMUM DESIGN OF SUPERSONIC EJECTOR SYSTEM STRUCTURE OF...

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32nd Congress of the International Council of the aeronautical sciences, ICAS 2021

作者： Su, Jinyou Tang, Zhili Tian, Jinhu Pan, Biao Luo, Shaojun Key Laboratory of Unsteady Aerodynamics and Flow Control Ministry of Industry and Information Technology Nanjing University of Aeronautics and Astronautics Nanjing210016 China Science and Technology on Altitude Simulation Laboratory Sichuan Gas Turbine Establishment Aero Engine Corporation of China Sichuan Mianyang621000 China

ISBN: (纸本)9783932182914

In order to study the test requirements of vectoring nozzle aeroengine in high altitude simulation test bed, and the matching between the vectoring nozzle and the exhaust ejector of the test bed in the supersonic working state. Numerical simulation method is used to determine the straight section inner diameter, length diameter ratio and injection ratio of the exhaust ejector of the test bench, and the relative position of the vectoring nozzle and the exhaust ejector, and the aerodynamic structure of the ejector of the test bench under the condition of vectoring nozzle test. Using the typical working points of vectoring nozzle to check the applicability of the ejector aerodynamic structure, The results show that the aerodynamic structure of the ejector meets the test requirements of the vectoring nozzle. © 2021 32nd Congress of the International Council of the aeronautical sciences, ICAS 2021. All rights reserved.

关键词： Computational fluid dynamics

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Neural Machine Translation by Fusing key Information of Text

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Computers, Materials & Continua 2023年第2期74卷 2803-2815页

作者： Shijie Hu Xiaoyu Li Jiayu Bai Hang Lei Weizhong Qian Sunqiang Hu Cong Zhang Akpatsa Samuel Kofi Qian Qiu Yong Zhou Shan Yang School of Information and Software Engineering University of Electronic Science and Technology of ChinaChengdu610054China Science and Technology on Altitude Simulation Laboratory Sichuan Gas Turbine Establishment Aero Engine Corporation of ChinaMianyang621000China School of Power and Energy Northwestern Polytechnical UniversityXi’an710072China School of Computer Science Southwest Petroleum UniversityChengdu610500China Department of Chemistry Physics and Atmospheric SciencesJackson State UniversityJacksonMS 39217USA

When the Transformer proposed by Google in 2017,it was first used for machine translation tasks and achieved the state of the art at that *** the current neural machine translation model can generate high quality translation results,there are still mistranslations and omissions in the translation of key information of long *** the other hand,the most important part in traditional translation tasks is the translation of key *** the translation results,as long as the key information is translated accurately and completely,even if other parts of the results are translated incorrect,the final translation results’quality can still be *** order to solve the problem of mistranslation and missed translation effectively,and improve the accuracy and completeness of long sentence translation in machine translation,this paper proposes a key information fused neural machine translation model based on *** model proposed in this paper extracts the keywords of the source language text separately as the input of the *** the same encoding as the source language text,it is fused with the output of the source language text encoded by the encoder,then the key information is processed and input into the *** incorporating keyword information from the source language sentence,the model’s performance in the task of translating long sentences is very *** order to verify the effectiveness of the method of fusion of key information proposed in this paper,a series of experiments were carried out on the verification *** experimental results show that the Bilingual Evaluation Understudy(BLEU)score of the model proposed in this paper on theWorkshop on Machine Translation(WMT)2017 test dataset is higher than the BLEU score of Transformer proposed by Google on the WMT2017 test *** experimental results show the advantages of the model proposed in this paper.

关键词： key information transformer fusion neural machine translation

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A Model Average Algorithm for Housing Price Forecast with Evaluation Interpretation

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Journal of Quantum Computing 2022年第3期4卷 147-163页

作者： Jintao Fu Yong Zhou Qian Qiu Guangwei Xu Neng Wan School of Computer Science Southwest Petroleum UniversityChengdu610500China Key Laboratory on Aero-Engine Altitude Simulation Technology Sichuan Gas Turbine EstablishmentAECCMianyang621000China Aero Engine Academy of China Aero Engine Corporation of ChinaBeijing101300China

In the field of computer research,the increase of data in result of societal progress has been remarkable,and the management of this data and the analysis of linked businesses have grown in *** are numerous practical uses for the capability to extract key characteristics from secondary property data and utilize these characteristics to forecast home *** regression methods in machine learning to segment the data set,examine the major factors affecting it,and forecast home prices is the most popular method for examining pricing *** is challenging to generate precise forecasts since many of the regression models currently being utilized in research are unable to efficiently collect data on the distinctive elements that correlate y with a high degree of house price *** today’s forecasting studies,ensemble learning is a very prevalent and well-liked study *** regression integration computation of large housing datasets can use a lot of computer resources as well as computation time,and ensemble learning uses more resources and calls for more machine support in integrating diverse *** Average Model suggested in this paper uses the concept of fusion to produce integrated analysis findings from several models,combining the best benefits of separate *** Average Model has a strong applicability in the field of regression prediction and significantly increases computational *** technique is also easier to replicate and very effective in regression *** using regression processing techniques,this work creates an average of different regression models using the AM(Average Model)algorithm in a novel *** evaluating essential models with 90%accuracy,this technique significantly increases the accuracy of house price *** experimental results show that the AM algorithm proposed in this paper has lower prediction error than other comparison algorithms,and the prediction accurac

关键词： Machine learning AM algorithm price forecast regression algorithm Model evaluation

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Arrangement of signal measuring points of planetary gear transmission based on dynamics simulation 15

Arrangement of signal measuring points of planetary gear tra...

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15th IEEE Global Reliability and Prognostics and Health Management Conference, PHM-Beijing 2024

作者： Yang, Weixin Liu, Feichun Xin, Tang Zhu, Rupeng AECC Hunan Aviation Powerplant Research Institute Zhuzhou China Aero-engine vibration technology in Aeronautical Science Key Laboratory Zhuzhou China Nanjing University of Aeronautics and Astronautics Nanjing China

ISBN: (纸本)9798350354010

Planetary gear box has complex structure and high failure rate. How to effectively reveal the fault characteristics of the key components in the planetary gear box and find and solve the fault in time is the focus and difficulty of current research. This paper takes the planetary gear meshing system as the research object, combines multi-body dynamics and finite element analysis, considers the transmission path of vibration signals, establishes a rigid-flexible coupling model, analyzes the characteristics and causes of the vibration signals obtained by simulation, seeks the best measuring point position of the vibration acceleration sensor, and verifies the effectiveness of the simulation model through the measured signals. © 2024 IEEE.

关键词： Gear transmissions

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Investigation of tip-leakage-vortex breakdown and its role in rotating stall in a 1.5-stage low-speed axial-compressor 16

Investigation of tip-leakage-vortex breakdown and its role i...

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16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016

作者： He, Xiang Ma, Hongwei Wei, Wei National Key Laboratory of Science and Technology Aero-Engines Collaborative Innovation Center of Advanced Aero-Engine School of Energy and Power Engineering Beihang University Beijing100191 China China Aviation Powerplant Research Institute Zhuzhou412002 China

A whole-annulus unsteady numerical simulation is carried out to investigate the mechanism of the rotating stall in a 1.5-stage low-speed axial-compressor. By comparing the experimental and numerical results, the numerical results are validated. The numerical simulation captures the most features of the rotating stall of the 1.5-stage compressor observed from the experimental results. The unsteady bubble-like breakdown appears in the tip leakage vortex at the near stall condition. With the compressor throttling, the modal wave appears, increases in intensity and induces the part of the breakdown-vortex flow spilled over the adjacent blade leading-edge unsteadily, which form a spike. Consequently, the spikes emerge around the compressor annulus at the same time and the intensity and size of the spikes is increased rapidly during the inception period. At last, the spikes are merged into a large stall cell, which propagates around the annulus with 30% rotor speed. © Open Archives of the 16th International Symposium on Transport Phenomena and Dynamics of Rotating Machinery, ISROMAC 2016. All rights reserved.

关键词： Vortex flow

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aerodynamic design of three-stage vaneless counter-rotating turbine

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航空动力学报 2014年第7期29卷 1667-1679页

作者： ZHOU Kun LIU Huo-xing ZOU Zheng-ping WANG Lei National Key Laboratory of Science and Technology on Aero-Engine Aero-thermodynamics School of Energy and Power Engineering Beijing University of Aeronautics and Astronautics Beijing 100191 China Turbine Division Shenyang Engine Design and Research Institute Aviation Industry Corporation of China Shenyang 110015 China

An aerodynamic design criterion was discussed for the 1+3/2 counter-rotating turbine by analyzing the velocity *** are 8 key aerodynamic parameters in the criterion,based on the consideration of aerodynamic efficiency and some strength ***,an aerodynamic design for the 1+3/2 counter-rotating turbine was made according to the criterion,and a three-dimensional simulation was conducted for ***,the conclusions were *** criterion containing 8 key aerodynamic parameters is verified rationally and the efficiency of the turbine reaches 91%.The aerodynamic characteristics of 1+3/2 counter-rotating turbine are mainly decided by the load coefficient,and due to an optimal power distribution coefficient of the low pressure turbine,the efficiency of the low pressure turbine can be best.

关键词： 1+3 2counter-rotating turbine velocity triangle aerodynamic design criterion three-dimensional simulation

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Quantitative study of high-frequency fatigue hole-edge stresses in nickel-based single-crystal superalloy 2

Quantitative study of high-frequency fatigue hole-edge stres...

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2nd International Conference on Frontier Materials, ICFM 2023

作者： Li, Leyu Li, Zheng Liu, Jiabin Zhang, Jingang Deng, Zhiwei Li, Quanwei Liu, Xinling AECC Beijing Institute of Aeronautical Materials China AVIC Failure Analysis Center China Beijing Key Laboratory of Aeronautical Materials Testing and Evaluation China Key Laboratory of Aeronautical Materials Testing and Evaluation Aero Engine Corporation of China China Aviation Key Laboratory of Science and Technology on Materials Testing and Evaluation China

In this paper, the influence of air film holes on the stress distribution of nickel-based single-crystal superalloy blades is investigated, a simulated test piece is designed for the analysis and test of the stress distribution of air film holes, and a method of quantitative inverse inference of the stress at the edge of the air film holes is proposed. Finite element simulation of high circumferential vibration fatigue of the simulated test piece was carried out by ANSYS to obtain the gradient of stress distribution at the hole edge. The EBSD technique was used to measure the dimensions of the plastic zone in the region near the fracture, and the quantitative fatigue stresses were extrapolated using a crack tip plastic zone model with Tresca yield criterion. The compressive stress exerted by the femtosecond laser perforation method on the air film aperture wall was detected by the nanoindentation technique, and the residual stress was analysed using the S. Suresh computational model. The results of this study show that based solely on finite element simulation, it is not possible to completely simulate the effect of residual stresses caused by machining on fatigue fracture, which in turn leads to a lack of conformity between the results of finite element simulation and the results of the inverse plastic zone size extrapolation;however, the stress magnitude at the edge of the hole can be well computed by combining the stress concentration coefficients from finite element simulation with the stresses from the inverse plastic zone size extrapolation after taking into account the residual stresses from machining. The quantitative analysis results of this method have an error within 1.3 times the dispersion band compared to the test data. © 2023 Published under licence by IOP Publishing Ltd.

关键词： Nickel

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A Multi-Feature Fusion Method for Fault Diagnosis with Applications in Tail Paddle Lever Bearing 15

A Multi-Feature Fusion Method for Fault Diagnosis with Appli...

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15th IEEE Global Reliability and Prognostics and Health Management Conference, PHM-Beijing 2024

作者： Long, Zhou Gan, Hao Yang, Weixin Li, Kai Li, Xiuwen AECC Hunan Aviation Power Plant Research Institute Aero-engine Vibration Technology in Aeronautical Science Key Laboratory Zhuzhou China TangZhi Science & Technology Hunan Development Co.Ltd. Changsha China BeiJing TangZhi Technology Development Co. Ltd. Beijing China

ISBN: (纸本)9798350354010

Aiming at the problems such as difficult monitoring and inaccurate state evaluation of helicopter tail rotor rod bearing. In this paper, temperature and vibration sensors are used to collect the temperature and vibration signals of bearings. Then the collected signal is constructed by means of noise reduction, feature extraction and feature fusion. And the characteristic data set is used as the input of fault diagnosis model after state index evaluation, health index generation and dimensionality reduction. Last, the improved gravity search algorithm (GGSA) is used to optimize the parameters of support vector machine (SVM) diagnosis model to form GGSA-SVM model for bearing fault diagnosis. In the simulation test, compared with the previous method, the number of iterations of the model is reduced by 21 times, the fitness is reduced to 0.4%, and the accuracy of bearing fault diagnosis is increased by 4.4% to 97.9%. The experimental results show that the model can be used for bearing fault diagnosis better. © 2024 IEEE.

关键词： Fault detection

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aerodynamic modeling and transient performance improvement of a free jet altitude test facility 6th

Aerodynamic modeling and transient performance improvement o...

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6th International Conference on Artificial Intelligence and Security,ICAIS 2020

作者： Wu, Feng Gao, Limin Wu, Xinyun Feng, Xudong Leng, Lintao Li, Yaoyu School of Power and Energy Northwestern Polytechnical University Xi’an710072 China The National Key Laboratory of Aerodynamic Design and Research Xi’an710129 China School of Information and Software Engineering University of Electronic Science and Technology of China Chengdu610054 China Key Laboratory of Science and Technology on Aero-Eigine Altitude Simulation AECC Sichuan Gas Turbine Establishment Chengdu610000 China

ISBN: (纸本)9789811581007

An inlet-engine altitude test facility for flight condition simulation is modeled for the system dynamic performance improvement. The system model equations are solved with an improved Euler integral method. To simulate the interaction between the tested engine and the test bench accurately, a turbojet engine module is introduced in the system model. By modeling and simulation, a linear temperature compensation control algorithm based on the control error is validated for feasibility;controller parameters optimization for cabin static pressure stabilizing is also carried out. In this paper, some issues like temperature transient performance and engine operate impact restraint on cabin static pressure are discussed efficiently and economically. With the characteristics of high efficiency and economy, the modeling and simulation tools are suitable for the optimization of such systems. © Springer Nature Singapore Pte Ltd 2020.

关键词： engines

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