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Chinese Journal of Aeronautics 2024年第4期37卷 23-53页

作者： Wenqi WANG Wei LIU Yang ZHANG Yang LIU Peidong ZHANG zhenyuan jia State Key Laboratory of High-Performance Precision Manufacturing Dalian University of TechnologyDalian 116024China

As one of the most important terminals in machining, cutting tools have been widely used for components manufacturing in aerospace and other industries. The quality of these components and processing efficiency are closely linked to the performance of cutting tools. Therefore, it is essential and critical to inspect the cutting tools and monitor the condition during the stage of manufacturing and machining. This review aims to discuss and summarize the key problems, methods,and techniques from the perspective of the tool geometric and the physical quantities measurement,including machine vision, physical sensors and data processing. It is worth mentioning that we focus on the topic of precision measurement methods and discuss universal solutions by identifying the common characteristics of the measured quantities. Eventually, the challenges and future trends for the development of in-depth research and practical applications are concluded. The research and application of precise measurement techniques for geometric and physical quantities will better promote the development of intelligent manufacturing.

关键词： Cutting tools Mechanical measurement Machine vision Physical sensors Tool condition monitoring

Accuracy evaluation for in-situ machining reference points binocular measurement based on credibility probability

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Chinese Journal of Aeronautics 2024年第1期37卷 472-486页

作者： Binchao YU Wei LIU Yanze ZHANG Dazhi MA zhenyuan jia Yi YUE jiabo ZHANG Key Laboratory for Precision and Non-Traditional Machining Technology of the Ministry of Education Dalian University of TechnologyDalian 116024China Beijing Spacecrafts China Academy of Space TechnologyBeijing 100081China

Passive binocular measurement systems are being increasingly utilized in the in-situ industries of automobiles,aviation,and aerospace,etc.due to their excellent qualities of accuracy,efficiency,and cost performance.Whereas the barrier of evaluating the accuracy of measured objects resulted from the unequal equivalent focal length and quantization of pixels,has limited their further development and application of high requirements for in-situ machining,e.g.,the measurement of machining reference points for the positioning of robotic drilling in aerospace manufacturing.In this paper,an accuracy evaluation method is proposed to address the problem.Firstly,the unequal equivalent focal length is considered to improve the accuracy of 3D reconstruction.Next,the credibility probability model is developed to calculate the probability of the observed error in the public view of the binocular measurement system and indicates the direction of improvement.Finally,the in-situ experiment is carried out to validate the method within the effective public view range of 300 mm×300 mm.The experiment results show that the RMSs of observed errors are superior to 0.035 mm,and the credibility probabilities are all higher than 0.91;the maximum 3D reconstruction accuracy improvement is 60.3%,with the error reduced from 0.078 mm to 0.031 mm.

关键词： Aerospace manufacturing Binocular vision Credibility probability Pixel quantization Unequal equivalent focal length

3D Microdisplacement Monitoring of Large Aircraft Assembly with Automated In Situ Calibration

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Engineering 2022年第12期19卷 105-116页

作者： zhenyuan jia Bing Liang Wei Liu Kun Liu jianwei Ma School of Mechanical Engineering Dalian University of TechnologyDalian 116024China

Three-dimensional(3D)microdisplacement monitoring plays a crucial role in the assembly of large aircraft.This paper presents a broadly applicable high-precision online 3D microdisplacement monitoring method and system based on proximity sensors as well as a corresponding in situ calibration method,which can be applied under various extreme working conditions encountered in the aircraft assembly process,such as compact and obstructed spaces.A 3D monitoring model is first established to achieve 3D microdisplacement monitoring based only on the one-dimensional distances measured by proximity sensors,which concerns the extrinsic sensor parameters,such as the probe base point(PBP)and the unit displacement vector(UDV).Then,a calibration method is employed to obtain these extrinsic parameters with high precision by combining spatial transformation principles and weighted optimization.Finally,calibration and monitoring experiments performed for a tailplane assembly process are reported.The calibration precision for the PBP is better than±10 lm in the X and Y directions and±2 lm in the Z direction,and the calibration precision for the UDV is better than 0.07°.Moreover,the accuracy of the 3D microdisplacement monitoring system can reach±15 lm.In general,this paper provides new insights into the modeling and calibration of 3D microdisplacement monitoring based on proximity sensors and a precise,efficient,and low-cost technical means for performing related measurements in compact spaces during the aircraft assembly process.

关键词： Aircraft manufacture Assembly Calibration Condition monitoring Displacement measurement

A Portable Noncontact Profile Scanning System for Aircraft Assembly

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Engineering 2022年第8期8卷 206-213页

作者： Bing Liang Wei Liu Kun Liu Mengde Zhou Yang Zhang zhenyuan jia School of Mechanical Engineering Dalian University of TechnologyDalian 116024China

Three-dimensional(3D)profile scanning plays a crucial role in the inspection of assembled large aircraft.In this paper,to achieve noncontact automatic measurements of the high-reflective profiles of large-scale curved parts and components,an automated noncontact system and method with high accuracy and high efficiency are presented.First,a hybrid 3D coordinate measurement system based on proximity sensors and cameras is proposed to obtain noncontact measurements while avoiding the influence of high reflection on the measurement accuracy.A hybrid measurement model that combines the one-dimensional distances measured by the proximity sensors and the 3D information obtained by cameras is proposed to determine high-accuracy 3D coordinates of the measured points.Then,a profile-driven 3D automated scanning method and strategy are designed to rapidly scan and reconstruct the profile within the effective range without scratching the profile or exceeding the measurement range of the proposed system.Finally,experiments and accuracy analyses are performed in situ on an assembled tailplane panel(approximately 1760 mm×460 mm).The automated scanning process is completed in a timeframe of 208s with an average error of less than 0.121 mm for profile reconstruction.Therefore,the proposed method is promising considering both the high accuracy and high efficiency requirements of profile inspections for large aircraft.

关键词： Aircraft testing Three-dimensional measurement Profile reconstruction Automated scanning Scanning strategy

Flow Field and Temperature Field of Water-Cooling-Type Magnetic Coupling

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Chinese Journal of Mechanical Engineering 2019年第4期32卷 61-72页

作者： Lei Wang zhenyuan jia Yuqin Zhu Li Zhang School of Mechanical Engineering Dalian University of Technology Dalian 116023China State Key Laboratory of Coal Mine Safety Technology CCTEG Shenyang Research Institute Fushun 113122 China

At present, the water-cooling simulation of the water-cooled magnetic coupler is based on the water-cooled motor and the hydraulic coupler, which cannot accurately characterize the temperature distribution of the rotating watercooled coupling of the coupler. Focusing on rotating water cooling radiating, the present paper proposes simulating the water cooling temperature field as well as the flow field through the method of combining fluid-solid coupled heat transfer and MRF(Multiphase Reference Frame). In addition, taking an 800 kW magnetic coupling as an example, the paper optimizes the shape, number, cooling water inlet speed? and so on? of the cooling channel. Considering factors such as the complete machine’s temperature, and drag torque, it is proved that the cooling e ect is best when there are 36 involute curved channels and when the inlet speed is 3 m/s. Further, through experiments, the actual temperature values at six di erent positions when 50 kW and 70 kW thermal losses di er are measured. The measured values agree with the simulation results, proving the correctness of the proposed method. Further, data have been collected during the entire experimental procedure? and the variation in the coupling’s temperature is analyzed in depth, with the objective of laying a foundation for the estimation of the inner temperature rise as well as for the optimization of the structural design.

关键词： Water-cooling magnetic coupling Fluid-solid coupling Channel,Three-dimensional temperature field

Remote-controlled flexible pose measurement system and method for a moving target in wind tunnel

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Chinese Journal of Aeronautics 2018年第1期31卷 89-98页

作者： Wei LIU Xin MA Ling CHEN zhenyuan jia Weixiao LIU Xiao LI jiakun ZHANG Jiwen LU Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education Dalian University of Technology Dalian 116024 China

The measurement of position and attitude parameters for the isolated target from a highspeed aircraft is a great challenge in the field of wind tunnel simulation technology. This paper proposes a remote-controlled flexible pose measurement system in wind tunnel conditions for the separation of a target from an aircraft. The position and attitude parameters of a moving object are obtained by utilizing a single camera with a focal length and camera orientation that can be changed based on different measurement conditions. Using this proposed system and method, both the flexibility and efficiency of the pose measurement system can be enhanced in wind tunnel conditions to meet the measurement requirements of different objects and experiments, which is also useful for the development of an intelligent position and attitude measurement system. The position and the focal length of the camera also can be controlled remotely during measurements to enlarge both the vertical and horizontal measurement range of this system. Experiments are conducted in the laboratory to measure the position and attitude of moving objects with high flexibility and efficiency, and the measurement precision of the measurement system is also verified through experiments.

关键词： High-speed motion Machine vision Pose measurement Remote-controlled flexible Wind tunnel

An active damping vibration control system for wind tunnel models

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Chinese Journal of Aeronautics 2019年第9期32卷 2109-2120页

作者： Wei LIU Mengde ZHOU Zhengquan WEN Zhuang YAO Yu LIU Shihong WANG Xiaochun CUI Xiao LI Bing LIANG zhenyuan jia Key Laboratory for Precision and Non-traditional Machining Technology of the Ministry of Education Dalian University of TechnologyDalian 116024China AVIC Aerodynamics Research Institute Shenyang 110034China

In wind tunnels, long cantilever sting support systems with low structural damping encounter flow separation and turbulence during wind tunnel tests, which results in destructive low-frequency and big-amplitude resonance, leading to data quality degradation and test envelope limitation. To ensure planed test envelope and obtain high-quality data, an active damping vibration control system independent of balance signal based on stackable piezoelectric actuators and velocity feedback using accelerometer, is proposed to improve the support stability and wind tunnel testing safety in transonic wind tunnel. Meanwhile, a design of powerful sting-root embedded active damping device is given and an active vibration control method is presented based on the mechanism analysis of aircraft model vibration. Furthermore, a self-adaptive fuzzy Proportion Differentiation(PD) control model is proposed to realize control parameters adjustment automatically for various testing conditions. Besides, verification tests are performed in laboratory and a continuous transonic wind tunnel. Experimental results indicate that the aircraft model does not vibrate obviously from -4° to 11° at Ma = 0.6, the number of useable angle-of-attack has increased by 7° at Ma = 0.6 and 5° at Ma = 0.7 respectively, satisfying the requirements of practical wind tunnel tests.

关键词： Accelerometer Active damping Sting vibration Transonic wind tunnel Vibration active control

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感知系统触发条件穿透率评估方法研究

汽车工程 2024年第4期46卷 577-587,604页

作者：陈君毅刘镇源杨雪珠王天辰李海霞贾通邢星宇吴新政同济大学汽车学院上海201804 中国第一汽车股份有限公司长春130011

预期功能安全问题制约着自动驾驶汽车的落地。自动驾驶感知系统面临的各种极端行驶环境等极易引起预期功能安全问题。因此,须按照现有预期功能安全标准,在安全分析阶段识别并评估种类多且数量大的触发条件,筛选高价值触发条件为后续测... 详细信息

预期功能安全问题制约着自动驾驶汽车的落地。自动驾驶感知系统面临的各种极端行驶环境等极易引起预期功能安全问题。因此,须按照现有预期功能安全标准,在安全分析阶段识别并评估种类多且数量大的触发条件,筛选高价值触发条件为后续测试验证提供测试场景输入。本文中首先基于对触发条件在自动驾驶系统中的风险演化过程的分析,提出一套包括暴露率、穿透率和危害率的三维感知系统触发条件评估体系。随后,基于层次分析法构建了触发条件穿透率量化评估方法。最后,针对某量产车型的融合感知系统分析并选取15个触发条件,构建测试用例并开展封闭场地测试,评估上述触发条件的穿透率。最终经计算筛选得到3个高风险触发条件,验证了触发条件穿透率量化评估方法的可行性。

关键词：感知系统预期功能安全触发条件量化评估封闭场地测试

Corrosion Behavior of GH3535 Alloy Induced by Selenium

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Acta Metallurgica Sinica(English Letters) 2023年第6期36卷 1047-1056页

作者： zhenyuan Zhu Fenfen Han Yanyan jia Changying Wang Cuilan Ren Hanxun Qiu Xingtai Zhou University of Shanghai for Science and Technology Shanghai 200093China Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China Changzhou Institute of Technology Changzhou 213032China

Corrosion behavior of a Ni-16Mo-7Cr base superalloy was systematically investigated under a selenium(Se)atmosphere at 700°C.It shows that Se can react with the alloy elements such as Ni,Mo,Cr et al.to form a reaction layer at the surface of alloy,which is mainly composed of Ni_(2)Se_(3),MoSe_(2),and Cr_(3)Se_(4).The tensile properties of the alloy are not greatly affected by changes of Se content.The slight decrease in the tensile strength is attributed to the formation of the reaction layer,which leads to the decrease in the effective undertaking area of the alloy.No intergranular diffusion characteristic of Se elements was observed,and the Se effect of embrittlement on grain boundaries is weaker than that of tellurium(Te).

关键词： GH3535 alloy Selenium Fission product Intergranular embrittlement Molten salt reactor

主动脉腔内全程重塑装置(AERD)治疗Stanford A型主动脉夹层的临床疗效分析

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中华胸心血管外科杂志 2024年第6期40卷 324-330页

作者：徐振圆王海越卢晨刘宇杨鹏张洪伟肖正华蒙炜胡佳四川大学华西医院心脏大血管外科成都四川大学华西广安医院心脏大血管外科广安

目的探讨主动脉腔内全程重塑装置(aortic endovascular remodeling device, AERD)在Stanford A型主动脉夹层Ⅱ型杂交手术中的早中期结果, 评价其临床疗效。方法 2021年2月至2023年10月, 共纳入46例Stanford A型主动脉夹层患者, 男32例, ... 详细信息

目的探讨主动脉腔内全程重塑装置(aortic endovascular remodeling device, AERD)在Stanford A型主动脉夹层Ⅱ型杂交手术中的早中期结果, 评价其临床疗效。方法 2021年2月至2023年10月, 共纳入46例Stanford A型主动脉夹层患者, 男32例, 女14例, 参与四川大学华西医院单中心临床试验, 接受Ⅱ型杂交手术(Bentall/升主动脉置换术+AERD主动脉腔内修复)。通过对术后死亡比例、心脑血管意外、截瘫、脏器缺血等临床指标, 以及真假腔体积变化、弓上分支血流量等血流情况进行分析, 探讨AERD在Stanford A型主动脉夹层Ⅱ型杂交手术中的安全性及有效性。研究方案已在中国临床试验注册中心注册(ChiCTR2000036883)。结果随访期间死亡3例(6.52%), 其中手术相关死亡2例(4.35%)。余43例随访(25.53±9.60)个月, 术后发生卒中事件2例(4.35%), 未发现截瘫、急性肾功能不全等其他严重并发症。随访过程中, 主动脉弓上分支血流通畅, 术前及各随访时间点分支血流量均无明显差异;术后真腔血流量较术前显著增加, 假腔随时间逐渐血栓化, 腔内血流量减少。术后2年时, 支架部分真腔体积相较术前扩大59.0%, 假腔体积缩小82.4%。结论 AERD在治疗急性Stanford A型主动脉夹层的Ⅱ型杂交手术中安全有效, 有助于提高该类患者围术期及近远期生存率, 降低并发症发生率, 改善临床结局。

关键词：急性A型主动脉夹层杂交手术主动脉腔内重塑装置主动脉腔内修复术