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PROFILE TOLERANCE EVALUATION OF PARAMETRIC CURVES AND SURFACES

Chinese Journal of mechanical engineering 2002年第2期15卷 121-125页

作者： huang xiaoping xiong youlunschool of mechanical science and engineering, huazhong university of science and technology,wuhan 430074, china School of mechanical science and engineering Huazhong University of Science and Technology Wuhan 430074

The profile error evaluation of complex curves and surfaces expressed inparametric form is considered. The linear error model is established on the base of two hypothesesfirstly. Then the profile error evaluation is converted into one of these optimal formulations:MINIMAX, MAXMIN and MINIDEX problems, which are easier to be solved than the initial form. To eachone of them, geometric condition and algebraic condition are presented to arbitrate whether theideal element reaches to the optimal position. Exchange algorithm is proven highly effective insearching for solutions to these optimization problems. At last some key problems in tolerance offreeform surfaces and curves in B spline method are discussed.

关键词： Parametric form Profile tolerance Linear error model Exchangealgorithm

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Multi-View Point Clouds Registration without Feature Extraction for Use in Reverse engineering of CAD Models

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Computer Aided Drafting,Design and Manufacturing 2001年第2期11卷 46-52页

作者： huang xiaoping,xiong Youlun School of mechanical science and engineering huazhong university of science and technology, wuhan 430074, china Reverse engineering School of mechanical science and engineering huazhong university of science and technology Wuhan 430074 China

For reverse engineering a CAD model, it is necessary to integrate measured points from several views of an object into a common reference frame. Given a rough initial alignment of point cloud in different views with point-normal method, further refinement is achieved by using an improved iterative closest point (ICP) algorithm. Compared with other methods used for mult-view registration, this approach is automatic because no geometric feature, such as line, plane or sphere needs to be extracted from the original point cloud manually. A good initial alignment can be acquired automatically and the registration accuracy and efficiency is proven better than the normal point-point ICP algorithm both experimentally and theoretically.

关键词： reverse engineering iterative closest point algorithm registration.

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Cloud Control System Architectures,Technologies and Applications on Intelligent and Connected Vehicles:a Review

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Chinese Journal of mechanical engineering 2021年第5期34卷 3-25页

作者： Wenbo Chu Qiqige Wuniri xiaoping Du Qiuchi xiong Tai huang Keqiang Li National Innovation Center of Intelligent and Connected Vehicles Beijing 100176China School of Software Beihang UniversityBeijing 100083China State Key Laboratory of Automotive Safety&Energy School of Vehicle and MobilityTsinghua UniversityBeijing 100084China

The electrification of vehicle helps to improve its operation efficiency and *** to fast development of network,sensors,as well as computing technology,it becomes realizable to have vehicles driving *** achieve autonomous driving,several steps,including environment perception,path-planning,and dynamic control,need to be ***,vehicles equipped with on-board sensors still have limitations in acquiring necessary environmental data for optimal driving *** and connected vehicles(ICV)cloud control system(CCS)has been introduced as a new concept as it is a potentially synthetic solution for high level automated driving to improve safety and optimize traffic flow in intelligent *** paper systematically investigated the concept of cloud control system from cloud related applications on ICVs,and cloud control system architecture design,as well as its core technologies *** on the analysis,the challenges and suggestions on cloud control system development have been addressed.

关键词： Intelligent and connected vehicles Cloud control system Cloud control base platform Cloud controlled and automated driving

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ANSYS疲劳分析在接骨板选型评估中的应用

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医用生物力学 2023年第3期38卷 556-560页

作者：李书荣李世芸熊鹰黄子毅杨小平昆明理工大学机电工程学院昆明650500 昆明医科大学附属延安医院骨科昆明650050 云南欧铂斯医疗科技有限公司昆明650032

目的通过对比股骨远端接骨板中A型、B型锁定加压接骨板(locking compression plate,LCP)的疲劳强度,为测试其弯曲强度及疲劳性能时对接骨板选型提供理论评估方法。方法通过对不同类型接骨板进行弯曲强度性能测试与疲劳性能测试,再结合AN... 详细信息

目的通过对比股骨远端接骨板中A型、B型锁定加压接骨板(locking compression plate,LCP)的疲劳强度,为测试其弯曲强度及疲劳性能时对接骨板选型提供理论评估方法。方法通过对不同类型接骨板进行弯曲强度性能测试与疲劳性能测试,再结合ANSYS Workbench对接骨板总变形、von Mises应力及疲劳使用寿命进行有限元分析。结果A型接骨板疲劳强度比B型接骨板高30.7%,A型接骨板应力比B型接骨板要低,A型接骨板最低疲劳使用寿命比B型接骨板要高17%。结论A型接骨板的疲劳性能比B型接骨板良好,故A型接骨板的失效可能性比B型接骨板的可能性要低。研究结果为测试新研发的两种接骨板各种性能时对不同接骨板选型辅助提供参考。

关键词：接骨板疲劳使用寿命弯曲强度疲劳分析

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