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A novel intelligent adaptive control of laser-based ground thermal test

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Chinese Journal of Aeronautics 2016年第4期29卷 1018-1026页

作者： Gan Zhengtao Yu Gang li shaoxia He Xiuli Chen Ru Zheng Caiyun Ning Weijian Key Laboratory of Mechanics in Advanced Manufacturing Institute of Mechanics Chinese Academy of Sciences

Laser heating technology is a type of potential and attractive space heat flux simulation technology, which is characterized by high heating rate, controlled spatial intensity distribution and rapid response. However, the controlled plant is nonlinear, time-varying and uncertainty when implementing the laser-based heat flux simulation. In this paper, a novel intelligent adaptive controller based on proportion-integration-differentiation (PID) type fuzzy logic is proposed to improve the performance of laser-based ground thermal test. The temperature range of thermal cycles is more than 200 K in many instances. In order to improve the adaptability of controller, output scaling factors are real time adjusted while the thermal test is underway. The initial values of scaling factors are optimized using a stochastic hybrid particle swarm optimization (H-PSO) algorithm. A validating system has been established in the laboratory. The performance of the proposed controller is evaluated through extensive experiments under different operating conditions (reference and load disturbance). The results show that the proposed adaptive controller performs remarkably better compared to the conventional PID (PID) controller and the conventional PID type fuzzy (F-PID) controller considering performance indicators of overshoot, settling time and steady state error for laser-based ground thermal test. It is a reliable tool for effective temperature control of laser-based ground thermal test. (C) 2016 Chinese Society of Aeronautics and Astronautics. Production and hosting by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license.

关键词： Adaptive control Fuzzy logic Ground thermal test Laser heating Thermal control

Quasi-Dammann grating with proportional intensity of array spots for surface hardening of metal

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Science China(Physics,Mechanics & Astronomy) 2011年第1期54卷 79-83页

作者： li shaoxia TAN QiaoFeng YU Gang WANG HengHai JIN GuoFan Key Laboratory of Mechanics in Advanced Manufacturing Institute of Mechanics Chinese Academy of Sciences Beijing 100190 China State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University Beijing 100084 China The 14th Research Institute China Electronics Technology Group Corporation Nanjing 210039 China

For surface hardening of metal,a quasi-Dammann grating (QDG) is proposed and fabricated to generate array spots with proportional-intensity *** get uniformly hardened band distribution and improve the wear resistance of the sample surface,a three-order QDG is designed to produce array spots with enhanced intensity in the *** design and fabrication of the QDG are described in *** surface profile of the fabricated grating was measured,which shows that the fabrication error is less than 2%.The laser beam intensity distribution shaped by the QDG was tested by a laser beam analyzer to verify the validity of the *** application of the QDG in the laser surface hardening of metal was experimentally investigated,and the results show that the hardness distribution of the modified layer and the wear resistance of the sample surface are improved significantly by using the QDG.

关键词： quasi Dammann grating beam shaping laser surface hardening diffraction

Experimental and numerical study of thermal fatigue behavior under variable amplitude induced by pulsed laser

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Science China(Physics,Mechanics & Astronomy) 2018年第10期61卷 88-91页

作者： SiNing Pan Gang Yu Xiuli He shaoxia li Ru Chen Institute of Mechanics Chinese Academy of Sciences School of Engineering Science University of Chinese Academy of Sciences

Thermal fatigue is the typical failure mode of high-temperature combustion chamber components used in power plants and in the aerospace and transportation industries [1-3]. With growing demand for good performance and high reliability, thermal fatigue is becoming a serious problem. The thermal working conditions of combustion chamber components include start-stop cycles and routine working cycles simultaneously [4,5]. The former refer to large temperature changes, with the amplitude of 200℃-500℃ and time period of several hundred seconds that are responsible for low-cycle fatigue （LCF） damage. The latter correspond to low temperature amplitudes of 20℃-60℃, with time period of milliseconds, and are responsible for high-cycle fatigue （HCF） damages.

关键词：疲劳行为振幅试验性工作周期可变光导学习交通工业

Numerical simulation of powder transport behavior in laser cladding with coaxial powder feeding

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Science China(Physics,Mechanics & Astronomy) 2015年第10期58卷 28-37页

作者： liU Hao HE Xiuli YU Gang WANG Zhong Bin li shaoxia ZHENG CaiYun NING WeiJian School of Mechanical and Electrical Engineering China University of Mining and Technology Jiangsu Key Laboratory of Mine Mechanical and Electrical Equipment China University of Mining and Technology Key Laboratory of Mechanics in Advanced Manufacturing Institute of Mechanics Chinese Academy of Sciences

Laser cladding with coaxial powder feeding is one of the new ponent to improve performance of its surface. In the process, processes applied to produce well bonding coating on the com- the clad material is transported by the carrying gas through the coaxial nozzle, generating gas-powder flow. The powder feeding process in the coaxial laser cladding has important influence on the clad qualities. A 3D numerical model was developed to study the powder stream structure of a coaxial feeding nozzle. The predicted powder stream structure was well agreed with the experimental one. The validated model was used to explore the collision behavior of particles in the coaxial nozzle, as well as powder concentration distribution. It was found that the par- ticle diameter and restitution coefficient greatly affect the velocity vector at outlet of nozzle due to the collisions, as well as the powder stream convergence characteristics below the nozzle. The results indicated a practical approach to optimize the powder stream for the coaxial laser cladding.

关键词： laser cladding solid-gas flow numerical simulation collision behavior

Single-row laser beam with energy strengthened ends for continuous scanning laser surface hardening of large metal components

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Science China(Physics,Mechanics & Astronomy) 2013年第6期56卷 1074-1078页

作者： li shaoxia YU Gang ZHANG JingChuan TAN QiaoFeng XU NingHan SUN PeiPei ZHENG CaiYun State Key Laboratory of Precision Measurement Technology and Instruments Tsinghua University Key Laboratory of Mechanics in Advanced Manufacturing Institute of MechanicsChinese Academy of Sciences Beijing Institute of Spacecraft Environment Engineering

For laser surface hardening of metal components with large superficies,a binary grating is proposed to generate single-row laser beam with proportional-intensity diffractive *** obtain a uniform hardened band distribution and improve the wear resistance of the sample surface,the binary grating is designed to produce single-row laser beam with energy strengthened at the two *** profile of the laser beam spot was designed to be strip with high length-width ratio to improve the machining efficiency of the hardening of large surfaces.A new advantage is suggested to obtain proportional intensity spots with *** design results show that the diffractive efficiency of the binary grating is more than 70%,and the uniformity is less than 3%.The surface profile of the grating fabricated was measured,which shows that the fabrication error is less than 2%.The application of the binary grating in the laser surface hardening of metal components with large superficies is experimentally investigated,and the results show that the hardness distribution of the modified layer is more uniform than that hardened by Gaussian laser beam or array spots with equal intensity distribution.

关键词： binary grating beam shaping laser surface hardening diffraction

“润治互洽”逻辑的建构:文化润疆助力新疆社会治理的理论与实践之维

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广西民族研究 2021年第5期 32-39页

作者：魏莉李少霞新疆大学马克思主义学院新疆乌鲁木齐830046

"润治互洽"逻辑是对文化润疆完整意涵的深刻勾勒,它强调情感供给、情感认同和共识共治,在遵循制度、规则等刚性力量的基础上,凸显文化柔性力量的情感关照,致力于满足新疆各族人民的现实需要、搭建各族人民交往交流交融的情感纽带、提高... 详细信息

"润治互洽"逻辑是对文化润疆完整意涵的深刻勾勒,它强调情感供给、情感认同和共识共治,在遵循制度、规则等刚性力量的基础上,凸显文化柔性力量的情感关照,致力于满足新疆各族人民的现实需要、搭建各族人民交往交流交融的情感纽带、提高新疆社会治理的效能。新时代党的治疆方略为"润治互洽"逻辑的建构奠定了坚实的基础,新疆特殊的区情决定了"润治互洽"逻辑建构的必要性。"润治互洽"逻辑不是以抽象的理论演绎为基础,而是以人民立场和治理现代化的政策实践为内在支撑,其最终的落脚点在于维护新疆社会稳定和长治久安,实现情感相向、人心相齐、能量相聚。

关键词：文化润疆 “润治互洽”逻辑治理现代化情感认同

“共同体”语义下我国各民族交往交流交融的路径探赜

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广西民族研究 2023年第5期 18-28页

作者：李少霞魏莉新疆大学马克思主义学院新疆乌鲁木齐830046

“共同体”是一种以共同关系为纽带联结形成的关系性存在,体现为相关人群和睦相处、平等互助、凝聚彼此的内生情感关系,其核心构成要素是关系理性、价值共识和情感归属。交往交流交融的本质是推动各民族开展社会交往、文化交流和情感交... 详细信息

“共同体”是一种以共同关系为纽带联结形成的关系性存在,体现为相关人群和睦相处、平等互助、凝聚彼此的内生情感关系,其核心构成要素是关系理性、价值共识和情感归属。交往交流交融的本质是推动各民族开展社会交往、文化交流和情感交融,构建中华民族共同体。各民族交往交流交融的本质与“共同体”的核心构成要素具有内在的逻辑自洽关系,体现在:社会交往培植关系理性、文化交流增进价值共识、情感交融厚植情感归属。坚持从关系维度、价值维度和情感维度三个层面协调推进、有机统一,对于增进共同性、推进各民族的交往交流交融、增强中华民族的凝聚力和向心力具有重要意义。

关键词： “共同体” 中华民族共同体各民族交往交流交融关系理性价值共识情感归属

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全球空间正义对资本逻辑的否定与超越

理论探索 2022年第4期 14-22页

作者：李少霞魏莉新疆大学马克思主义学院乌鲁木齐830046

全球空间正义以人的自由全面发展为指导,以全球空间的断裂和失衡为基本着眼点,以深切的现实关怀积极回应全球性问题,从政治、经济、文化、社会和生态五个维度否定和超越资本逻辑。具体表现在:政治空间正义遏制资本逻辑的空间扩张,营造... 详细信息

全球空间正义以人的自由全面发展为指导,以全球空间的断裂和失衡为基本着眼点,以深切的现实关怀积极回应全球性问题,从政治、经济、文化、社会和生态五个维度否定和超越资本逻辑。具体表现在:政治空间正义遏制资本逻辑的空间扩张,营造公平正义的国际环境;经济空间正义有助于解决资本逻辑的内在困境,有效规制资本逻辑的衍生;文化空间正义廓清资本逻辑的文化宰制,破除普世价值的掣肘;社会空间正义根除资本逻辑的异化弊病,推进人的自由全面发展;生态空间正义揭示资本逻辑的反生态性,构建和谐的生命共同体。全球空间正义蕴含马克思正义理论的价值原则及以自由人的联合空间为基础的革命路径,旨在否定和超越资本宰制的全球性空间样态,摆脱“虚幻的空间共同体”,最终走向“自由人联合体”的共产主义空间。

关键词：全球空间正义资本逻辑资本宰制空间扩张共同体

铸牢中华民族共同体意识的基础与路径研究——以新疆为例

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西北民族大学学报（哲学社会科学版） 2021年第1期 21-31页

作者：李少霞魏莉新疆大学马克思主义学院新疆乌鲁木齐830046

中华民族共同体意识是国家统一强盛的根基、民族团结和睦的本源、民族精神凝聚的动力源。它体现了我国民族政策的价值取向,即知晓国情、维护统一、政治法治、团结奋斗、携手发展、共建共享。在新疆,各民族在长期的交往交流交融中和谐共... 详细信息

中华民族共同体意识是国家统一强盛的根基、民族团结和睦的本源、民族精神凝聚的动力源。它体现了我国民族政策的价值取向,即知晓国情、维护统一、政治法治、团结奋斗、携手发展、共建共享。在新疆,各民族在长期的交往交流交融中和谐共生、共御外辱、家国同构、共建新疆,淬炼了强烈的政治认同、国家认同和文化认同。这种相互认同、相互吸引、相互亲和的强大民族凝聚力和黏合力对于中华民族共同体意识的维系、结合、构建、提升、延续具有重要的功能性意义。因此,在实现中华民族伟大复兴新征程的关键时期,必须从"大局"和"大势"着眼,坚持团结稳疆、富民兴疆、长期建疆、依法治疆、文化润疆,在新疆铸牢坚不可摧的中华民族共同体意识。

关键词：中华民族共同体共同体意识新疆认同感归属感