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19th International Conference of Fluid Power and Mechatronic Control Engineering 2018

作者： Yi, Yali Gao, Yunfei Wei, Rui Jin, Herong College of Mechanical Engineering Yanshan University Qinhuangdao China Key Laboratory of Advanced Forging and Stamping Technology and Science Ministry of Education of China Yanshan University Qinhuangdao China Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao China

A highly efficient integrated transmission unit - external generating wave movable teeth transmission − was proposed and two kinds of typical transmission types were researched. Fixed and moving coordinate systems were established based on movable teeth transmission theory. On the basis of the profile of a wave generator, the teeth profile equations of ring gear were deduced by using the transform matrix and profile enveloping principle. The effects of the teeth number of the ring gear, generating wave coefficient, and tooth profile coefficient on the profile of the ring gear were investigated. The formula for calculating curvature radius of the ring gear was given. The pressure angle formulas were deduced, and the change rule of the pressure angle extremum was researched to obtain a continuous transmission condition. The relationship between design parameters and performance effect was analysed based on the analysis of the curvature and pressure angle. The results show that the transmission precision reached 97.67%, and the proper design parameters could guarantee transmission performance. Those researches lay a theoretical foundation for the design and application of an external generating wave movable teeth title. © 2019 Institution of Engineering and technology. All rights reserved.

关键词： Gear teeth

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Evolution analysis of key mechanical properties during the forming process of JCOE and JCOC pipes and its influence on collapse failure

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Ocean Engineering 2025年 335卷

作者： Shaocong Qi Guoyi Shen Xihai Liu Wanlin Cheng Ruixue Zhai Qingdang Meng Jun Zhao Gaochao Yu Key Laboratory of Advanced Forging & Stamping Technology and Science (Yanshan University) Ministry of Education of China Qinhuangdao 066004 China School of Mechanical Engineering Yanshan University Qinhuangdao 066004 China Hebei Huayang Steel Pipe Co. Ltd Cangzhou 061403 China Hebei Yadu Pipeline Equipment Co. Ltd Cangzhou 061300 China Department of Mechanical Engineering Imperial College London London SW7 2AZ UK

The LSAW pipes are main trunk pipes for offshore oil and gas energy development. Enhancing the buckling resistance performance of submarine pipes and accurately evaluating its collapse pressure are research priorities. This study analyzes for the first time the evolution of residual stress and compressive strength during the full-process forming of JCOE and JCOC pipes, and reveals the influence mechanism of mechanical properties on collapse. The yield plateau phenomenon and variable elastic modulus behavior of X65 steel were described by modifying Chaboche model. A theoretical model for the evolution of mechanical properties during JCO forming, expansion, and compression processes were established. The full-process forming and collapse simulations were conducted. The experimental and theoretical yield stresses have good consistency. The calibration ratio and t / D ratio are key factors affecting the yield stress and residual stress. Compared with JCOE pipes, JCOC pipes have lower residual stress but higher compressive strength. Within calibration ratio range of ±0.4 % to ±1.0 %, residual stress is the main factor affecting collapse. As the calibration ratio increases, residual stress improves and compressive yield stress becomes a key factor. This study is of great significance for the forming and buckling analysis of pipelines.

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Profile Division and Programmatic Modeling of Tetrahedral Truss Deployable Antennas

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Zhongguo Jixie Gongcheng/China Mechanical Engineering 2019年第12期30卷 1400-1408页

作者： Han, Bo Xu, Yundou Guo, Luyao Zhang, Shuo Yao, Jiantao Zhao, Yongsheng Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University QinhuangdaoHebei066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University QinhuangdaoHebei066004 China

Tetrahedral truss deployable antennas were studied, and a simple profile division method was proposed. Based on MATLAB and SOLIDWORKS, a programmatic modeling method was proposed. Custom software development for SOLIDWORKS was completed by VBA programming language, and visual operation interfaces were designed. Two examples of deployable antenna mechanisms were used to verify the correctness of the profile division method and the programmatic modeling processes. The proposed profile division method proposed herein is simple and the quality of the profile mesh is good, the method of programmatic modeling is convenient and quick to model the antenna mechanisms, and the overall design efficiency is greatly improved. © 2019, China Mechanical Engineering Magazine Office. All right reserved.

关键词： MATLAB

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Game Scene Construction for Lower Limb Rehabilitation Robot Based on Virtual Reality

Game Scene Construction for Lower Limb Rehabilitation Robot ...

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International Conference on Electromechanical Control technology and Transportation (ICECTT)

作者： Yongfei Feng Di Jin Qianjun Shao Jianye Niu Luige Vladareanu Hongbo Wang Faculty of Mechanical Engineering & Mechanics Ningbo University Ningbo China Hebei Key Laboratory of Robot Sensing and Human-Robot Interaction Hebei University of Technology Tianjin China Robotics and Mechatronic Department Institute of Solid Mechanics of the Romanian Academy Bucharest Romania Parallel Robot and Mechatronic System Laboratory of Hebei Province and Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao China

ISBN: (数字)9781728199283

ISBN: (纸本)9781728199290

At present, the number of patients with lower extremity dysfunction is increasing year by year. However, traditional rehabilitation training cannot meet the needs of patients for rehabilitation training. Rehabilitation robot is a good solution to train patients instead of the rehabilitation physician. Based on clinical practice experience, a lower limb rehabilitation training system based on virtual reality (VR) is designed, which combined the VR technology and rehabilitation evaluation program to improve the rehabilitation efficiency of patients. According to the functional requirements of the lower limb rehabilitation robot (LLR-RO), the construction of rehabilitation robot control system and sensor system is completed. Based on the Unity3D development environment, a VR scenes of space shooting is planned and created for rehabilitation training VR technology which enables patients to complete the training process while maintaining a pleasant mood. Through the software and hardware debugging, the feasibility, data transmission capability of VR-based remote rehabilitation training system and the synchronization performance of VR scenes and rehabilitation robots are verified. In the future, more virtual reality scenes will be studied to adapt to patients of different genders and ages.

关键词： Games Training Rehabilitation robotics Space vehicles Legged locomotion Aircraft Aerospace electronics

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A through process modeling using multi-assistant software applied to radial fatigue life predication of a 356-T6 wheels

Research Square

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Research Square 2020年

作者： Duan, Yong-Chuan Zhang, Fang-Fang Tian, Le Guan, Ying-Ping Hu, Jin-Hua Key Laboratory of Advanced Forming & Stamping Technology and Science Ministry of Education of China Yanshan University Hebei Qinhuangdao066004 China College of Mechanical Engineering Yanshan University Hebei Qinhuangdao066004 China Technical Center CITIC Dicastal Limited company Hebei Qinhuangdao066004 China

In order to solve the problem of isolated design in multi-process using multi-assistant software, a through-software radial fatigue life prediction model was established, the effects of shrinkage cavity, SDAS and mean stress on fatigue life were considered. The casting process of the aluminum alloy wheel was simulated based on ProCast, and the data of SDAS and porosity of different parts were predicted based on the solidification process;The data mapping algorithm between tetrahedral mesh elements was developed to realize the unidirectional transformation of microcosmic data from a cast model to a static mechanical model, the radial loading mechanical analysis model of a wheel containing microcosmic information was established;The fatigue life prediction model was established by Fesafe based on the specific mechanical and fatigue parameters of each node. Based on the self-developed TCD software, the integrated coupling method of the three software prediction models was realized. The application of this method on the virtual fatigue prediction experiment of unidirectional tensile specimen reduce the result dispersion between virtual and physical experiment, and the predicted life result error is reduced from 51% to 16%. The proposed method lays a solid foundation of the optimization design and lightweight design of aluminum alloy wheels. © 2020, CC BY.

关键词： Wheels

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Design and experimental study of the remote control for a novel patient transfer apparatus

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Journal of Physics: Conference Series 2021年第6期1748卷

作者： Yu Tian Hongbo Wang Yongshun Zhang Junjie Tian Jiazheng Du Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao Hebei China Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao Hebei China

This paper introduces the design of the remote control for a novel patient transfer apparatus. First, the overall design of the control system is put forward based on the working principle, and design requirements of the apparatus. Second, voltage regulator circuit of the remote control based on the MC34063 is designed to fit for the OLED displayer, parameters such as the filter capacitor have been determined. Next, wireless communication unit adopted CC1110 and the communication instruction code is introduced. Then, the interaction interface of the remote control is finished to facilitate the implementation of the adjustment functions. finally, a simulation and a real experiment has been completed, it indicates the correctness of the voltage regulator circuit and the effectiveness of the remote control respectively.

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Configuration Design and Mobility Analysis of the Scissors Overconstrained Double-Ring Truss Deployable Antenna Mechanism

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Jiqiren/Robot 2019年第3期41卷 362-371and383页

作者： Han, Bo Han, Yuanyuan Xu, Yundou Yao, Jiantao Zhao, Yongsheng Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao066004 China Department of Mathematics and Computer Science Hengshui University Hengshui053000 China

Based on the overconstrained scissors mechanism unit, a scissors overconstrained double-ring truss deployable antenna mechanism is constructed as a support mechanism for the satellite antenna. Firstly, the configuration mechanism and overconstraint characteristics of the scissors overconstrained double-ring truss mechanism are analyzed, and the units of the whole truss mechanism are decomposed. Then, the geometric conditions for the ring structure of the scissors overconstrained double-ring truss mechanism are derived in consideration of the effects of joint size. Furthermore, the screw constraint topology of the decomposed mechanism units is drawn based on the graph theory and screw theory, and the mobilities of the closed-loop deployable mechanism unit and the double-ring truss mechanism are analyzed. The result shows that the mobility of the whole double-ring truss mechanism is the same as that of the closed-loop deployable mechanism, with only one mobility. Finally, a simulation model of the double-ring truss deployable antenna mechanism is built, the deploying process of the whole double-ring truss is simulated, and the deployable feature is verified. The proposed scissors overconstrained double-ring truss deployable antenna mechanism has only one mobility, its kinematic joints are all revolute joints, and the movement form is simple. © 2019, science Press. All right reserved.

关键词： Screws

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Effects ofphysical parameters ofmultiphase flow on fire water monitor based on FLUENT

Effects ofphysical parameters ofmultiphase flow on fire wate...

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CSAA/IET International Conference on Aircraft Utility Systems, AUS 2018

作者： Yuan, Xiaoming Zhao, Shiyi Wang, Chu Zhang, Lijie Hebei Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Key Laboratory of Advanced Forging and Stamping Technology and Science Yanshan University Qinhuangdao China

ISBN: (纸本)9781785617911

To improve the jet performance of a fire water monitor, the monitor head with three different inner contour lines were designed. Based on FLUENT, the calculation domain was defined geometrically and then the cloud pictures of the flow velocity, pressure, turbulence kinetic energy and multiphase flow of the fluid field in the nozzle and jet were obtained, based on which the optimal structure of each model can be selected. The simulation result can provide the theoretical reference for the design of a monitor head. © 2018 IET Conference Publications. All rights reserved.

关键词： Flow velocity

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Type Synthesis of Ring Truss Deployable Antenna Mechanism Based on Screw Theory

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Yuhang Xuebao/Journal of Astronautics 2019年第7期40卷 831-841页

作者： Han, Bo Xu, Yun-Dou Han, Yuan-Yuan Yao, Jian-Tao Zhao, Yong-Sheng Parallel Robot and Mechatronic System Laboratory of Hebei Province Yanshan University Qinhuangdao066004 China Key Laboratory of Advanced Forging & Stamping Technology and Science of Ministry of Education Yanshan University Qinhuangdao066004 China Department of Mathematics and Computer Science Hengshui University Hengshui053000 China

Based on the screw theory, the type synthesis of the ring truss deployable antenna mechanism is studied. Firstly, the constrained synthesis method based on the screw theory is briefly introduced, and the deployment principle of the ring truss deployable antenna mechanism is analyzed. Then, the ring truss mechanism is divided into two parts, the upper ring edge and the lower ring edge, the ring truss mechanism can be obtained by constructing the ring edge mechanisms and connecting the upper and lower ring edges. Furthermore, the prismatic joint (P) ARE used to describe the movement characteristics of each node, the analysis and synthesis of the ring edge mechanisms are carried out by the constraint synthesis method based on the screw theory, 16 kinds of constraint branch mechanisms are obtained, and two kinds of constraint branch mechanisms are selected through analysis and optimization. The ring edge link mechanisms are obtained by combining the constraint branch mechanisms, and four ring truss deployable mechanisms are obtained through different connection combinations. Finally, three-dimensional models are built in Solidworks software for the four kinds of ring truss deployable mechanisms, and the deployable features of the four mechanisms are verified by the movement simulation. The research provides a new idea for the synthesis of the deployable antenna mechanisms, and the ring truss mechanisms obtained have a good application prospect in the field of space deployable antenna. © 2019, Editorial Dept. of JA. All right reserved.

关键词： Computer software

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The study and engineering application on adaptive leveling of vehicle platform 7

The study and engineering application on adaptive leveling o...

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7th International Conference on Advances in Construction Machinery and Vehicle Engineering, ICACMVE 2019

作者： Wang, Jianjun Zhao, Jingyi Li, Wenlei Cai, Wei Wang, Yongchang Hebei Provincial Key Laboratory of Heavy Machinery Fluid Power Transmission and Control Yanshan University Qmhuangdao Hebei066004 China Department of Mechanical Engineering Anhm Technical College of Mechanical and Electrical Engineering Wuhu Anhui241002 China Key Laboratory of Advanced Forging & Stamping Technology and Science Qmhuangdao Hebei066004 China College of Mechanical Engineering Yanshan University Qmhuangdao Hebei066004 China Hebei Key Laboratory of Special Delivery Equipment Qmhuangdao Hebei066004 China

ISBN: (纸本)9781728139050

Leveling control of bearing platform of large engineering transport vehicle is very important for the safety and reliability of transportation. The leveling method of the load-bearing platform of the transporter is studied. According to the actual working conditions, through the force analysis of the load-bearing platform and the calculation method of the load center of gravity, the allowable loading area for the anti-overturning of the engineering transporter under the condition of four-point support is put forward. An adaptive electro-hydraulic leveling system based on four-point support is designed, and four groups of suspension hydraulic system are simplified as a single-support system model. The hydraulic system is built by AMESim software, and the control system is built by MATLAB software, Then the feasibility of the leveling control system is verified through the simulation. The results show that the control strategy has better precision and shorter reaction time, and is more suitable for vehicle leveling control system. On this basis, And the electro-hydraulic leveling control system was designed for the 100 tons of hydraulic truck of an enterprise, double-axis tilt sensor is used to monitor the level of the platform in real time, and the controller can make the suspension hydraulic cylinders act accordingly to keep the platform level. Finally, the actual vehicle leveling experiment is carried out, and the experiments of load sharing and unbalanced load lifting are carried out respectively. It is found that the leveling accuracy can be controlled within 0.25 degrees, which fully meets the engineering application and can provide reference for the development of similar systems. © 2019 IEEE.

关键词： MATLAB

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