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Multi-disciplinary design optimization with variable complexity modeling for a stratosphere airship

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Chinese Journal of Aeronautics 2019年第5期32卷 1244-1255页

作者： Shi YIN Ming ZHU haoquan liang School of Aeronautic Science and Engineering Beihang University School of Automation Science and Electrical Engineering Beihang University

This paper proposes a hybrid architecture based on Multi-disciplinary Design Optimization(MDO) with the Variable Complexity Modeling(VCM) method, to solve the problem of general design optimization for a stratosphere airship. Firstly, MDO based on the Concurrent SubSpace Optimization(CSSO) strategy is improved for handling the subsystem coupling problem in stratosphere airship design which contains aerodynamics, structure, and energy. Secondly, the VCM method based on the surrogate model is presented for reducing the computational complexity in high-fidelity modeling without loss of accuracy. Moreover, the global-to-local optimization strategy is added to the architecture to enhance the process. Finally, the result gives a prominent stratosphere airship general solution that validates the feasibility and efficiency of the optimization architecture. Besides, a sensitivity analysis is conducted to outline the critical impact upon stratosphere airship design.

关键词： Multi-disciplinary design optimization Sensitivity analysis Stratosphere airship Surrogate model Variable complexity modeling

Near space airship conceptual design and optimization

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Journal of Communications and Information Networks 2016年第1期1卷 125-133页

作者： ZHU Ming YIN Shi liang haoquan ZHANG Xiayang School of Aeronautic Science and Engineering Beihang UniversityBeijing 100191China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

Near space airships have gained widespread attention owing to the unique characteristics of long endurance at high altitudes;because of this characteristic,such airships have great potential for use in the fields of communication relay,early warning,earth observation *** space airships can substitute near-earth geostationary satellites owing to the advantages of high load and long endurance at altitude exceeding 20 *** against gravity is generated by the airship hull,which is completely filled with helium,while the near space airship is equipped with an electrical propulsion system powered by solar *** conventional aircraft,nearspace airships are a new type of vehicles with less design experience;coupled multi-disciplinary problems related to aerodynamics,structure,energy,control,*** the aim of finding a solution for opti-mal near-space airship design,this study proposed a design using a multidisciplinary design optimization method.

关键词： near space airship conceptual design optimization aerodynamics structure energy

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基于可靠性的太阳能飞机多学科设计优化

南京航空航天大学学报 2012年第4期44卷 464-471页

作者：姜光泰祝明梁浩全武哲北京航空航天大学航空科学与工程学院北京100191

针对太阳能飞机典型任务要求,建立了以总重最小为目标的多学科设计优化模型,考虑飞行性能、能量、重量3个学科的设计变量和相应约束条件。同时考虑设计变量的不确定性影响,将序列优化及可靠性评估方法引入到并行子空间优化过程中,顺序... 详细信息

针对太阳能飞机典型任务要求,建立了以总重最小为目标的多学科设计优化模型,考虑飞行性能、能量、重量3个学科的设计变量和相应约束条件。同时考虑设计变量的不确定性影响,将序列优化及可靠性评估方法引入到并行子空间优化过程中,顺序执行可靠性分析和多学科设计优化以提高执行效率。在优化过程中应用响应面近似并不断提高模型精度,降低了计算成本。利用iSIGHT软件搭建求解平台,以欧洲太阳能飞机"HeliPlat"作为算例,验证了分析模型的合理性和优化方法的有效性。基于可靠性的多学科设计优化框架有望用于更贴合工程实际的太阳能飞机设计。

关键词：多学科设计优化太阳能飞机并行子空间优化序列优化及可靠性评估

基于改进CO-RS的平流层飞艇总体设计与优化

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北京航空航天大学学报 2013年第2期39卷 239-243页

作者：梁浩全祝明姜光泰武哲北京航空航天大学航空科学与工程学院北京100191

为改进响应面协同优化(CO-RS,Collaborative Optimization based on ResponseSurface)方法的工程实用性,提出改进的CO-RS方法.在响应面建立中应用广义乘子法和信赖域法,取消响应面更新对梯度的依赖性.针对平流层飞艇的总体设计与优化问... 详细信息

为改进响应面协同优化(CO-RS,Collaborative Optimization based on ResponseSurface)方法的工程实用性,提出改进的CO-RS方法.在响应面建立中应用广义乘子法和信赖域法,取消响应面更新对梯度的依赖性.针对平流层飞艇的总体设计与优化问题,基于改进的CO-RS框架,进行了系统任务分析和学科耦合分析.对气动与推进子系统、结构子系统和能源子系统进行了学科分析,以最小化平流层飞艇的质量为目标,建立基于改进CO-RS框架的多学科设计优化(MDO,Multidisciplinary Design Optimization)模型和相应的学科分析模型.利用iSIGHT软件搭建求解平台,采用改进的CO-RS算法进行仿真计算,并得到合理结果,验证了所建立的MDO模型的合理性和改进的CO-RS算法在平流层飞艇总体设计优化中的有效性.

关键词：飞艇多学科设计优化协同优化总体设计响应面

基于改进RPG方法的MUAVs协同目标跟踪

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航空学报 2016年第5期37卷 1644-1656页

作者：赵长春梁浩全祝明武哲娄文杰北京航空航天大学航空科学与工程学院北京100083

多无人机(MUAVs)协同Standoff目标跟踪制导律由保持距离的横侧向制导律和保持相对相位角的纵向制导律组成。无人机(UAV)进行Standoff目标跟踪的横侧向制导律采用参考点制导(RPG)方法。针对UAV在基于RPG方法的制导律下存在参考视线与相... 详细信息

多无人机(MUAVs)协同Standoff目标跟踪制导律由保持距离的横侧向制导律和保持相对相位角的纵向制导律组成。无人机(UAV)进行Standoff目标跟踪的横侧向制导律采用参考点制导(RPG)方法。针对UAV在基于RPG方法的制导律下存在参考视线与相对速度方向夹角需要保持为锐角、转弯速率在UAV运动方向远离目标情况下太小的不足,提出了改进RPG方法。设计了基于改进RPG方法的MUAVs协同Standoff目标跟踪横侧向制导律和纵向制导律,分析了制导律的稳定性和收敛性,并验证了改进方法的可行性。采用原始RPG方法和改进RPG方法对UAV分别跟踪静止目标和跟踪运动目标进行仿真的结果表明,UAV处于任意初始位置及飞行方向都能快速进入到期望飞行轨迹,应用改进RPG方法可使UAV围绕目标顺时针飞行或者逆时针飞行,验证了改进RPG方法比原始RPG方法的效率更高。

关键词：多无人机 Standoff跟踪制导协同目标跟踪

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基于核心网分析和决策的5G网络智能调度

电信科学 2021年第9期37卷 129-138页

作者：王庆扬杨智斌龙彪梁灏泉中国电信股份有限公司研究院移动通信技术研究所广东广州510630 中国电信股份有限公司研究院广东广州510630

5G系统更大的频宽和复杂的空口技术不可避免地带来总体能耗的显著增长,因此移动网络的绿色节能引发了广泛的关注。5G与4G的长期共存以及5G的低频广覆盖和高频大带宽特性,使得不同类型的业务可以由5G的不同载波或者4G分别承载。基于以上... 详细信息

5G系统更大的频宽和复杂的空口技术不可避免地带来总体能耗的显著增长,因此移动网络的绿色节能引发了广泛的关注。5G与4G的长期共存以及5G的低频广覆盖和高频大带宽特性,使得不同类型的业务可以由5G的不同载波或者4G分别承载。基于以上考虑,提出了基于核心网分析和决策的5G网络智能调度方案,可以将不同类型的业务调度到不同的接入方式和工作频段上进行承载,从而实现业务保障和绿色节能。仿真结果表明,与现有的无线调度方案相比,5G网络智能调度在保障服务质量的同时,节能效果更具优势。最后,介绍了5G网络智能调度国际标准化工作进展。

关键词： 5G 多接入多频段智能调度服务质量节能

基础课教学中培养本科生科研素养的探索——以《无机化学》碱金属/碱土金属配合物为例

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大学化学 2024年第7期39卷 247-263页

作者：梁作中魏灵灵曹译文魏韵涵史海媚郑浩铨高胜利陕西师范大学化学化工学院西安710119

新时代教育背景下,在基础课程中培养本科生的知识应用能力、科研能力和创新思维已经成为《无机化学》的主要教学目标之一。《无机化学》下册“碱金属/碱土金属”章节中大部分教学内容学生已在高中学习,针对教学内容重复和课堂讲授单调... 详细信息

新时代教育背景下,在基础课程中培养本科生的知识应用能力、科研能力和创新思维已经成为《无机化学》的主要教学目标之一。《无机化学》下册“碱金属/碱土金属”章节中大部分教学内容学生已在高中学习,针对教学内容重复和课堂讲授单调、单纯注重知识的课堂教学现状,结合学科发展和科学前沿对教学内容进行重构和拓展,重点引入碱金属/碱土金属配合物相关内容,该部分既是对上一章配位化学基础的巩固和深化,也是对当前无机化学科学前沿重要方向的扩展和补充。采取探究式教学方法,综合运用线上线下混合、课程思政、科研进展、软件操作、实验实践等将碱金属/碱土金属的课堂教学变得生动且有深度,师生合作互动,提升学生的学习积极性,引导学生思考和探究,强化和培养学生的自主学习、知识应用、创新思维和科研能力。

关键词：碱金属/碱土金属配合物教学改革科研实践

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Anion engineering of hierarchical Co-A(A=O,Se,P) hexagrams for efficient electrocatalytic oxygen evolution reaction

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Chinese Chemical Letters 2021年第10期32卷 3241-3244页

作者： Zuozhong liang Chenxi Yang Wei Zhang haoquan Zheng Rui Cao Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119China Sinopec Beijing Research Institute of Chemical Industry Beijing 100013China

Water electrolysis is considered to be an effective and promising technology to make high-purity H_(2),however,the relationship between anion species and catalytic performance of electrocatalysts is still not completely ***,we report an anion engineering strategy to tune electrocatalytic water oxidation activity for Co-based *** hierarchical Co-based oxide/selenide/phosphide(Co-A,A = O,Se,P)hexagrams have been chosen as model *** results and theoretical calculations reveal that the electron configuration,the electrical conductivity,and the oxidation potential of Co element in Co-A hexagrams could be moderated by the substitution of P atoms,which leads to the superior OER ***,Co-P hexagram displays a low overpotential(η = 269 mV) at j = 10 mA/cm^(2) for the oxygen evolution reaction(OER) compared to Co-O hexagram(η = 399 m V) and Co-Se hexagram(η = 347 mV).This work is of great importance in understanding coordination atoms(O,Se and P)induced electrocatalytic properties of hierarchical Co-based materials.

关键词： OER Anion engineering CoP CoSe_(2) Co_(3)O_(4)

Substituent position effect of Co porphyrin on oxygen electrocatalysis

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Chinese Chemical Letters 2021年第9期32卷 2841-2845页

作者： Haoyuan Lv Hongbo Guo Kai Guo Haitao Lei Wei Zhang haoquan Zheng Zuozhong liang Rui Cao Key Laboratory of Applied Surface and Colloid Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShaanxi Normal UniversityXi’an 710119China

Substituent effect of metal porphyrin molecular catalysts plays a crucial role in determining the catalytic activity of oxygen ***,substituent position effect of Co porphyrins on oxygen electrocatalysis,including the oxygen reduction reaction(ORR)and the oxygen evolution reaction(OER),was *** Co porphyrins,namely 2,4,6-OMe-CoP and 3,4,5-OMe-CoP,were selected as the research *** ORR and OER performance was evaluated by drop-coating molecular catalysts on carbon nanotubes(CNTs).The resulted 3,4,5-OMe-CoP/CNT exhibited high bifunctional electrocatalytic activities and better long-term stability for both ORR and OER than 2,4,6-OMe-CoP/***,when applied in the Zn-air battery,3,4,5-OMe-CoP/CNT exhibited comparable performance to that with precious metal-based *** enhanced catalytic activity may be attributed to the improved charge transfer rate,mass transfer and *** work provides an effective strategy to further enhance catalytic activity by introducing substituent position effect,which is of great importance for developing more efficient energy-related electrocatalysts.

关键词： Oxygen electrocatalysis Oxygen reduction reaction Oxygen evolution reaction Co porphyrin Substituent effect