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Development of a deviation package method for low-cost robust optimization in compressor blade design

Chinese Journal of Aeronautics 2024年第4期37卷 166-180页

作者： Mingzhi LI Xianjun YU dejun meng Guangfeng AN Baojie LIU Research Institute of Aero-Engine Beihang UniversityBeijing 100191China National Key Laboratory of Science&Technology on Aero-Engine Aero-Thermodynamics Beihang UniversityBeijing 100191China AECC Shenyang Engine Research Institute Shenyang 110015China

Manufacture variations can greatly increase the performance variability of compressor blades. Current robust design optimization methods have a critical role in reducing the adverse impact of the variations, but can be affected by errors if the assumptions of the deviation models and distribution parameters are inaccurate. A new approach for robust design optimization without the employment of the deviation models is proposed. The deviation package method and the interval estimation method are exploited in this new approach. Simultaneously, a stratified strategy is used to reduce the computational cost and assure the optimization accuracy. The test case employed for this study is a typical transonic compressor blade profile, which resembles most of the manufacture features of modern compressor blades. A set of 96 newly manufactured blades was measured using a coordinate measurement machine to obtain the manufacture variations and produce a deviation package. The optimization results show that the scatter of the aerodynamic performance for the optimal robust design is 20% less than the baseline value. By comparing the optimization results obtained from the deviation package method with those obtained from widely-used methods employing the deviation model, the efficiency and accuracy of the deviation package method are demonstrated. Finally, the physical mechanisms that control the robustness of different designs were further investigated, and some statistical laws of robust design were extracted.

关键词： Manufacture variations Robust design optimization Compressor leading edge Aerodynamics Physical mechanism

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Breaking the geometry-performance tradeoff in compressor deviation modeling: Nested principal component analysis

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CHINESE JOURNAL OF AERONAUTICS 2024年第9期37卷 131-149页

作者： Li, Mingzhi Yu, Xianjun meng, dejun An, Guangfeng Liu, Baojie Beihang Univ Res Inst Aeroengine Beijing 100191 Peoples R China Beihang Univ Natl Key Lab Sci & Technol Aeroengine Aerothermody Beijing 100191 Peoples R China AECC Shenyang Engine Res Inst Shenyang 110015 Peoples R China

Uncertainties in the aerodynamic performance of compressors, introduced by manufacturing variations, have received more and more attentions in recent years. The deviation model plays a crucial role in evaluating this uncertainty and facilitating robust design. However, current deviation models with a few variables cannot simultaneously achieve a precise geometric approximation of deviation and provide an accurate assessment of performance uncertainty. This paper introduces a novel deviation modeling method named Nested Principal Component Analysis (NPCA) to break this tradeoff. In this method, both geometry-based and performance-based modes are utilized to describe manufacturing variations. By considering aerodynamic sensitivity, surface deformations that significantly impact aerodynamic performance can be extracted for deviation modeling. To demonstrate the superiority of this newly proposed method, ninety-eight newly manufactured compressor rotor blades were measured using a coordinate measurement machine, and both NPCA and Principal Component Analysis (PCA) were employed to model the real manufacturing variations. The results indicate that, in comparison to the PCA method, the NPCA method achieves an equivalent level of accuracy in geometric reconstruction and evaluation of mean performance. Furthermore, the same level of accuracy can be obtained with eight NPCA modes and fifty PCA modes when assessing the scatter in aerodynamic performance. Finally, the working mechanism of the NPCA method for accurate uncertainty quantification was further investigated. (c) 2024 Production and hosting by Elsevier Ltd. on behalf of Chinese Society of Aeronautics and Astronautics. This is an open access article under the CC BY-NC-ND license (http://***/ licenses/by-nc-nd/4.0/).

关键词： Manufacturing variation Uncertainty quantification Dimension reduction Aerodynamics Flow mechanism SENSITIVITY-ANALYSIS DESIGN OPTIMIZATION IMPACT VARIABILITY UNCERTAINTY

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兼顾多模式的核心机驱动风扇级气动设计方法

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航空学报 2024年第2期45卷 77-84页

作者：杨晓飞孙太璐孟德君尹海宝王咏梅中国航发沈阳发动机研究所沈阳110015

为了满足多种工作模式性能需求,变循环发动机通常具有多条共同工作线,使得核心机驱动风扇级(CDFS)由常规压气机面向“线”的设计转变为面向“面”的设计。基于CDFS试验效率随进口可调导叶(VIGV)角度调节的变化规律,为兼顾不同工作模式性... 详细信息

为了满足多种工作模式性能需求,变循环发动机通常具有多条共同工作线,使得核心机驱动风扇级(CDFS)由常规压气机面向“线”的设计转变为面向“面”的设计。基于CDFS试验效率随进口可调导叶(VIGV)角度调节的变化规律,为兼顾不同工作模式性能,提出了CDFS降流量、压比设计方法。该方法降低了转子、静子的气动负荷,提升了反力度。数值仿真表明,CDFS降流量3.2%、压比5.0%设计使单外涵模式效率、喘振裕度依次降低0.5%和2.2%,双外涵模式效率、喘振裕度提升1.4%和4.7%,双外涵模式的性能收益高于单外涵模式的性能损失。级性能对比表明,降流量、压比设计的性能收益源自VIGV、静子总压恢复系数的提升。基于发动机在不同工作模式下的性能需求优先级,以及CDFS工作点可由前涵道引射器调整的优势,降流量、压比设计是可行的,具有很高的应用潜力。

关键词：变循环发动机核心机驱动风扇级降流量降压比气动设计

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固相萃取结合高效液相色谱-串联质谱法测定禽蛋中5种硝基咪唑类药物残留

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云南化工 2024年第7期51卷 90-93,108页

作者：欧阳小艳黄珊蒙德军韦卓才覃沛南宁市疾病预防控制中心广西南宁530001 广西化工研究院有限公司广西南宁530001

目的:建立一种固相萃取结合高效液相色谱-串联质谱快速测定禽蛋中甲硝唑、洛硝哒唑、替硝唑、奥硝唑和二甲硝唑残留的分析方法。方法:禽蛋样品经5%三氯乙酸溶液涡旋提取、MCX固相萃取小柱净化,采用ACQUITYUPLC^(TM)BEH C_(18)色谱柱作... 详细信息

目的:建立一种固相萃取结合高效液相色谱-串联质谱快速测定禽蛋中甲硝唑、洛硝哒唑、替硝唑、奥硝唑和二甲硝唑残留的分析方法。方法:禽蛋样品经5%三氯乙酸溶液涡旋提取、MCX固相萃取小柱净化,采用ACQUITYUPLC^(TM)BEH C_(18)色谱柱作为分析柱,采用0.1%甲酸水-甲醇作为流动相体系,采用正离子喷雾模式电离、多反应离子监测方式进行分析。结果:在0.5~50.0 ng/mL的线性范围内,5种硝基咪唑类药物的线性方程均呈良好线性关系,相关系数r^(2)>0.9984。5种硝基咪唑类药物的检出限低至0.25μg/kg,在低、中、高三组质量浓度水平下,平均加标回收率在70.8%~111.3%范围内,相对标准偏差在1.4%~6.2%范围内。结论:该方法有机试剂消耗少、低毒环保、前处理简单易操作、分析速度快、灵敏度和准确度较高,重现性好,适用于禽蛋中硝基咪唑类药物残留的检测分析。

关键词：硝基咪唑类药物固相萃取高效液相色谱-串联质谱法禽蛋

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QuEChERS-高效液相色谱串联质谱法检测鸡蛋中金刚烷胺、金刚乙胺、氟虫腈及其代谢物残留

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化工技术与开发 2024年第6期53卷 62-66页

作者：欧阳小艳黄珊蒙德军韦卓才覃沛南宁市疾病预防控制中心广西南宁530023 广西化工研究院有限公司广西南宁530001

建立了采用QuEChERS结合高效液相色谱-串联质谱法,快速测定鸡蛋中的金刚烷胺、金刚乙胺、氟虫腈及其代谢物残留量的方法。鸡蛋样品经水^(-1)%甲酸乙腈涡旋提取、盐析、QuEChERS净化后,以A Venusil MP C18色谱柱为分析柱,0.1%甲酸水-乙... 详细信息

建立了采用QuEChERS结合高效液相色谱-串联质谱法,快速测定鸡蛋中的金刚烷胺、金刚乙胺、氟虫腈及其代谢物残留量的方法。鸡蛋样品经水^(-1)%甲酸乙腈涡旋提取、盐析、QuEChERS净化后,以A Venusil MP C18色谱柱为分析柱,0.1%甲酸水-乙腈为流动相,进行梯度洗脱,采用正负离子喷雾模式电离,多反应离子监测方式进行定性及定量分析。在0.1~20.0ng·mL^(-1)的线性范围内,6种化合物的回归方程均呈良好的线性关系,相关系数r>0.9995。金刚烷胺、金刚乙胺、氟虫腈、氟虫腈砜、氟虫腈亚砜、氟甲腈的检出限,分别为0.5、0.5、0.1、0.1、0.1、0.1μg·kg^(-1),在低、中、高3组浓度水平下,平均加标回收率在81.1%~113.0%之间,相对标准偏差(RSD)在0.2%~9.2%之间。该方法的前处理简单易操作,检测速度快,检测灵敏度和准确度高,重现性好,可以满足同时快速检测鸡蛋中金刚烷胺、金刚乙胺、氟虫腈及其代谢产物残留的需求。

关键词： QuEChERS 鸡蛋金刚烷胺金刚乙胺氟虫腈及其代谢物高效液相色谱-串联质谱法

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Design and Implementation of OTG communication system terminal Based on USB

Design and Implementation of OTG communication system termin...

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2011 International Conference on Control, Automation and Systems Engineering(CASE)

作者： LIN Zhigui meng dejun ZHONG Qingqing School of information and Communication Engineering Tianjin Polytechnic University School of Electrical Engineering and Automatic Tianjin Polytechnic University

To mobile communication requirement of portable device,a USB On-The-Go(OTG) communication system terminal,based on Freescale's 32-bit MCU – MCF52223,is designed in the *** system terminal can implement USB host function and USB peripheral *** system design includes software part and hardware *** hardware design includes power management circuit and interface circuit *** OTG software on the IDE of Code Warrior is designed by component ***,we build the OTG software architecture and analyze its structural ***,initialization mode judgement software,OTG drive software,host/ peripheral software packet and role switch protocol software packet also are designed on the basis of software ***,the debugging result is shown in the *** result shows that the system terminal can implement not only host function but also peripheral function and has stable ***,the design also provides a guide to application terminal design based on USB OTG.

关键词： MCF52223 USB OTG

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Evaluation of Nonbreaking Wave-Induced Mixing Parameterization Schemes Based on a One-Dimensional Ocean Model

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Journal of Ocean University of China 2024年第3期23卷 567-576页

作者： TANG Ran HUANG Chuanjiang DAI dejun WANG Gang The First Institute of Oceanography Ministry of Natural ResourcesQingdao 266061China Laboratory for Regional Oceanography and Numerical Modeling Laoshan LaboratoryQingdao 266237China Shandong Key Laboratory of Marine Science and Numerical Modeling Qingdao 266061China

Surface waves have a considerable effect on vertical mixing in the upper *** the past two decades,the vertical mixing induced through nonbreaking surface waves has been used in ocean and climate models to improve the simulation of the upper *** far,several nonbreaking wave-induced mixing parameterization schemes have been proposed;however,no quantitative comparison has been performed among *** this paper,a one-dimensional ocean model was used to compare the performances of five schemes,including those of Qiao et al.(Q),Hu and Wang(HW),Huang and Qiao(HQ),Pleskachevsky et al.(P),and Ghantous and Babanin(GB).Similar to previous studies,all of these schemes can decrease the simulated sea surface temperature(SST),increase the subsurface temperature,and deepen the mixed layer,thereby alleviating the common thermal deviation problem of the ocean model for upper ocean *** these schemes,the HQ scheme exhibited the weakest wave-induced mixing effect,and the HW scheme exhibited the strongest effect;the other three schemes exhibited roughly the same *** particular,the Q and P schemes exhibited nearly the same *** the simulation based on observations from the Ocean Weather Station Papa,the HQ scheme exhibited the best performance,followed by the Q *** the experiment with the HQ scheme,the root-mean-square deviation of the simulated SST from the observations was 0.43℃,and the mixed layer depth(MLD)was 2.0 *** a contrast,the deviations of the SST and MLD reached 1.25℃ and 8.4 m,respectively,in the experiment without wave-induced mixing.

关键词： wave-induced mixing surface waves sea surface temperature mixed layer depth General Ocean Turbulence Model

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Microstructured Cantilever Probe on Optical Fiber Tip for Microforce Sensor

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Photonic Sensors 2024年第2期14卷 89-99页

作者： Famei WANG Changrui LIAO mengqiang ZOU dejun LIU Haoqiang HUANG Chao LIU Yiping WANG Shenzhen Key Laboratory of Ultrafast Laser Micro/Nano Manufacturing Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education/Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things Guangdong and Hong Kong Joint Research Centre for Optical Fibre SensorsState Key Laboratory of Radio Frequency Heterogeneous IntegrationShenzhen UniversityShenzhen 518060China School of Electronics Science Northeast Petroleum UniversityDaqing 163318China

Benefiting from the great advances of the femtosecond laser two-photon polymerization(TPP)technology,customized microcantilever probes can be accurately 3-dimensional(3D)manufactured at the nanoscale size and thus have exhibited considerable potentials in the fields of microforce,micro-vibration,and microforce *** this work,a controllable microstructured cantilever probe on an optical fiber tip for microforce detection is demonstrated both theoretically and *** static performances of the probe are firstly investigated based on the finite element method(FEM),which provides the basis for the structural *** proposed cantilever probe is then 3D printed by means of the TPP *** experimental results show that the elastic constant k of the proposed cantilever probe can be actively tuned from 2.46N/m to 62.35N/*** force sensitivity is 2.5nm/μN,the Q-factor is 368.93,and the detection limit is ***,the mechanical properties of the cantilever probe can be flexibly adjusted by the geometric configuration of the ***,it has an enormous potential for matching the mechanical properties of biological samples in the direct contact mode.

关键词： Optical fiber sensor microforce sensing microstructured cantilever two-photon polymerization

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轴承早期故障特征提取方法研究

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工矿自动化 2020年第4期46卷 85-90,116页

作者：张猛苗长云孟德军天津工业大学电子与信息工程学院天津300380

针对滚动轴承早期故障信号被背景噪声淹没、故障特征不明显的问题,提出一种基于小波包分解和互补集合经验模态分解(CEEMD)的轴承早期故障信号特征提取方法.利用Matlab软件对采集到的轴承振动信号进行快速谱峭度分析,根据峭度最大化原则... 详细信息

针对滚动轴承早期故障信号被背景噪声淹没、故障特征不明显的问题,提出一种基于小波包分解和互补集合经验模态分解(CEEMD)的轴承早期故障信号特征提取方法.利用Matlab软件对采集到的轴承振动信号进行快速谱峭度分析,根据峭度最大化原则确定带通滤波器的中心频率和带宽,设计带通滤波器;对经过带通滤波器滤波后的信号进行小波包分解和CEEMD分解,根据峭度、相关系数筛选出有效本征模态函数(IMF)分量;利用IMF分量重构小波包信号,对重构小波包信号进行包络谱分析,提取轴承早期故障信号特征频率.该方法通过谱峭度分析降低背景噪声干扰,通过小波包分解增强故障冲击信号,并将CEEMD与小波包分解相结合,解决经典EMD分解存在的模态混叠、无效分量问题.仿真结果表明,相较于传统包络解调算法,重构后信号的背景噪声得到抑制,故障特征分量突出,验证了所提方法的可行性和有效性.

关键词：滚动轴承轴承故障诊断特征提取小波包分解互补集合经验模态分解峭度相关系数

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河床粗化过程中推移质输移特征试验研究

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水科学进展 2018年第3期29卷 339-347页

作者：徐元朱德军孟震李丹勋清华大学水沙科学与水利水电工程国家重点实验室北京100084

为了研究河床粗化破坏与形成过程中推移质的输移特征,基于一套新型的接沙系统,在上游无来沙条件下,进行了3组不同床沙级配的水槽试验,研究了递增梯级流量作用下河床粗化破坏与形成的过程,采集到一套高精度(0.1 g)、高频率(1 Hz)的实时... 详细信息

为了研究河床粗化破坏与形成过程中推移质的输移特征,基于一套新型的接沙系统,在上游无来沙条件下,进行了3组不同床沙级配的水槽试验,研究了递增梯级流量作用下河床粗化破坏与形成的过程,采集到一套高精度(0.1 g)、高频率(1 Hz)的实时推移质输沙率及分时段输沙级配数据,分析了累积输沙量、输沙率及输沙级配的变化特征。结果表明,粗化过程中累积输沙量随时间基本呈幂函数规律增长,且"粗化破坏再形成"的累积输沙量曲线出现明显转折点;推移质输沙率表现出明显的非恒定性,其粗化形成阶段的耗时要远大于粗化破坏阶段的时间,两者之比范围为3.5~20.5;推移质输沙级配中粗颗粒比例随时间变化趋势与输沙率相似,在输沙率达到峰值附近时,输沙级配与原始床沙级配相同。

关键词：推移质输沙率级配河床粗化输移特征

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