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2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS)最新文献

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Real-Time Forward Kinematics Algorithm for Redundant Parallel Mechanism 冗余并联机构的实时正运动学算法
2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS) Pub Date : 2021-10-01 DOI: 10.1109/icmeas54189.2021.00011
Fujun Kou, Yiping Chen, Weiya Liu, Zhixue Liu
{"title":"Real-Time Forward Kinematics Algorithm for Redundant Parallel Mechanism","authors":"Fujun Kou, Yiping Chen, Weiya Liu, Zhixue Liu","doi":"10.1109/icmeas54189.2021.00011","DOIUrl":"https://doi.org/10.1109/icmeas54189.2021.00011","url":null,"abstract":"A kinematics-based degree-of-freedom control method for a redundant parallel mechanism is presented in this paper. The control accuracy of the redundant parallel mechanism depends on the accuracy of kinematics to a great extend. Generally the poor real-time performance of the forward kinematics would make the performance of the redundant parallel mechanism less accurate. A brand new kind of algorithm based on closed-loop real-time feedback is proposed to improve the accuracy and the real-time performance of the forward kinematics. The simulation results show that the proposed forward kinematics is capable of be applied to engineering practice.","PeriodicalId":374943,"journal":{"name":"2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115815496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Development Technique of Large Composite Tank for Aerospace Vehicle 航天飞行器大型复合材料油箱研制技术
2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS) Pub Date : 2021-10-01 DOI: 10.1109/icmeas54189.2021.00051
Ji-peng Zhao, Bin Yu, T. Ma, S. Gu
{"title":"Development Technique of Large Composite Tank for Aerospace Vehicle","authors":"Ji-peng Zhao, Bin Yu, T. Ma, S. Gu","doi":"10.1109/icmeas54189.2021.00051","DOIUrl":"https://doi.org/10.1109/icmeas54189.2021.00051","url":null,"abstract":"The development techniques of large composite overwrapped pressure vessel(COPV) with metal liner for aerospace vehicle are summarized based on present design and flight heritage, including technique development, material selection, structure design, reliability design, manufacturing process, qualification test and tank standard. The development technique characteristic analysis is finished. The material development trend and characteristic of both liner and carbon fiber reinforced plastic (CFRP) material are introduced. Three typical structure design methods are introduced, including conventional grid theory (CGT), optimized grid theory (OGT) and finite element analysis (FEA). The reliability design method are studied, which included stress rupture life analysis, low fatigue life analysis and reliability design calculation theory. The main trend of large COPV is summarized. This paper integrates material selection and characterization, design methods analyses of composite layers and structural design and fabrication of composite tanks. COPVs require the CFRP layers to carry most static internal pressure, dynamic loads and environmental loads. The paper presents results of work of (Lanzhou Institute of Physics)LIP to develop high performance COPV. Preliminary design analysis of COPV have been accomplished. For the safe of reliability of COPV, it is important to study the failure mode of CFRP stress rupture. This paper addresses a method for analyzing COPV using the CFRP grid theory and FEA software.","PeriodicalId":374943,"journal":{"name":"2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115586813","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Decomposition of a Periodic Perturbed Signal with Unknown Perturbation Frequency by the Method of Variable Projection 扰动频率未知的周期扰动信号的变投影分解
2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS) Pub Date : 2021-10-01 DOI: 10.1109/icmeas54189.2021.00019
John W. Handler, D. Ninevski, P. O’Leary
{"title":"Decomposition of a Periodic Perturbed Signal with Unknown Perturbation Frequency by the Method of Variable Projection","authors":"John W. Handler, D. Ninevski, P. O’Leary","doi":"10.1109/icmeas54189.2021.00019","DOIUrl":"https://doi.org/10.1109/icmeas54189.2021.00019","url":null,"abstract":"This paper presents a new approach to separate a signal into its periodic and aperiodic components; whereby, the exact frequency of the periodic component is unknown. In other words, it is shown how to determine the underlying trend of a periodic perturbed signal and simultaneously identify the shape of the periodic perturbation. Therefore the signal is modeled by a nonlinear design matrix containing periodic basis functions, which depend on the unknown frequency, and aperiodic basis functions, more precisely discrete orthogonal polynomials (DOP). The nonlinear least squares problem of computing the model coefficients is solved by the method of variable projection. A well chosen partitioning of the design matrix enables an orthogonal residualization corresponding to a generalized Eckart-Young-Mirsky matrix approximation, which yields an efficient implementation of the variable projection method. This implementation is thoroughly tested using Monte Carlo simulations and the results are compared with those obtained by the classical implementation of the method of variable projection.","PeriodicalId":374943,"journal":{"name":"2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116952223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Kinetic Control on Hydraulic Actuators with MATLAB 液压作动器的MATLAB动力学控制
2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS) Pub Date : 2021-10-01 DOI: 10.1109/icmeas54189.2021.00012
Yuxin Tian, Changjiang Zhao, Jiang Yang, Lihua Liu
{"title":"Kinetic Control on Hydraulic Actuators with MATLAB","authors":"Yuxin Tian, Changjiang Zhao, Jiang Yang, Lihua Liu","doi":"10.1109/icmeas54189.2021.00012","DOIUrl":"https://doi.org/10.1109/icmeas54189.2021.00012","url":null,"abstract":"Design on leg hydraulic system of hexapod robot, is of vital importance to robotic kinetic motion control and robotic tractive force. In this paper, ANSYS Workbench simulation is established on loading-conditioned hydraulic cylinder, one component of hexapod robot hydraulic system, in order to find distinct stressed and deformed area. Mathematics models are built on hydraulic actuators and transfer functions on hydraulic actuators are analyzed with MATLAB. In addition, the controllability and observability of the system are studied with Simulink simulation.","PeriodicalId":374943,"journal":{"name":"2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116280690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reentry trajectory analysis of single-skinned parawing used in the hypersonic rarefied flow 高超声速稀薄流中单蒙皮刨削再入弹道分析
2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS) Pub Date : 2021-10-01 DOI: 10.1109/ICMEAS54189.2021.00049
Jian Guo, S. Fang, Shuai Zhang, Qiu Jian Rao
{"title":"Reentry trajectory analysis of single-skinned parawing used in the hypersonic rarefied flow","authors":"Jian Guo, S. Fang, Shuai Zhang, Qiu Jian Rao","doi":"10.1109/ICMEAS54189.2021.00049","DOIUrl":"https://doi.org/10.1109/ICMEAS54189.2021.00049","url":null,"abstract":"The single-skinned parawing with different wing loads and lift-to-drag(L/D), as a low wing loading decelerator during the stage of reentry, has been studied in reentry trajectory. The results show that the dynamic pressure and peak heat flux increase with the increase of the wing load, but the overload decreases with the increase of the wing load. When the lift coefficient is increased or the drag coefficient is reduced, the dynamic pressure and the dynamic peak load of the parawing are decreased during the reentry. The heat flux decreases with the increase of the lift coefficient and increases with the decrease of the drag coefficient. It can be obtained that while increasing the lift coefficient, maintaining a large drag coefficient is conducive to alleviating the aerodynamic heating problem during the reentry process.","PeriodicalId":374943,"journal":{"name":"2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117123363","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Magnetic Circuit Simulation and Analysis of Shear-Valve Mode MRF Damper 剪切阀型磁流变阻尼器的磁路仿真与分析
2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS) Pub Date : 2021-10-01 DOI: 10.1109/icmeas54189.2021.00020
W. Ma, Lv Hongzhan, Rui Chen, Zhihong Sun
{"title":"Magnetic Circuit Simulation and Analysis of Shear-Valve Mode MRF Damper","authors":"W. Ma, Lv Hongzhan, Rui Chen, Zhihong Sun","doi":"10.1109/icmeas54189.2021.00020","DOIUrl":"https://doi.org/10.1109/icmeas54189.2021.00020","url":null,"abstract":"The magnetic circuit structure in the damper is important for the design of the magnetorheological damper (MRD). This paper aims to explore the influence of various structural parameters in the magnetic circuit structure on shear-valve magnetorheological dampers. In order to establish the magnetic circuit structure model with different structural parameters and simulate the model with the finite element method, PAO-6, a polyolefin synthetic oil, was selected as the carrier liquid and the Carbonyl Iron Power whose average particle size is about 2 $mu$m was selected as the magnetic particles. Besides, some parameters of the magnetic circuit structure are set, including damping channel gap, cylinder wall thickness, coil slot length and depth as well as core thickness. Simulation results of different structural parameters are analyzed for comparing the variation of magnetic induction strength. The effects of different structural parameters on the performance of the MRD will be considered during the design, and the influence of the various structural parameters on the energy distribution of the magnetic field will be balanced to maximize the mechanical performance of the dampers.","PeriodicalId":374943,"journal":{"name":"2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126328866","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Theoretical Design and Numerical Study of Multistage Ejector Pump 多级喷射泵的理论设计与数值研究
2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS) Pub Date : 2021-10-01 DOI: 10.1109/icmeas54189.2021.00048
Bing Bai, Yifei Pei, Xuezhang Wang, Xiao Han, J. Gong
{"title":"Theoretical Design and Numerical Study of Multistage Ejector Pump","authors":"Bing Bai, Yifei Pei, Xuezhang Wang, Xiao Han, J. Gong","doi":"10.1109/icmeas54189.2021.00048","DOIUrl":"https://doi.org/10.1109/icmeas54189.2021.00048","url":null,"abstract":"A five-stage ejector pump was designed for high altitude test bed. The pneumatic function method was used to carry out the design. The first two stages have tow ejectors working in parallel and the other three stages have one ejector. Condensers were used between stages to remove water vapor which is chosen as the driving gas. CFD method was used to predict the properties of each stage of ejector. The overall performance of the five-stage ejector pump was obtained by analyzing the properties of each stage of the pump. The results show that with the increase of inlet pressure the mass pumping speed of each stage ejector increases and the ejection coefficient increases, too. The volume pumping speed increases as the inlet pressure increases, and decreases after reaching a certain pressure. The obtained ejector pump met the service requirements, which means that the pneumatic function method is effective in ejector design.","PeriodicalId":374943,"journal":{"name":"2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133313697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of multi-degree of freedom mechanism in vacuum and low-temperature environment 真空低温环境下多自由度机构的设计
2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS) Pub Date : 2021-10-01 DOI: 10.1109/icmeas54189.2021.00046
Menglong Xu, Shizeng Lv
{"title":"Design of multi-degree of freedom mechanism in vacuum and low-temperature environment","authors":"Menglong Xu, Shizeng Lv","doi":"10.1109/icmeas54189.2021.00046","DOIUrl":"https://doi.org/10.1109/icmeas54189.2021.00046","url":null,"abstract":"In order to simulate the on-orbit state of the spacecraft more truly, the motion mechanism is usually used to adjust the position and posture of the specimen during the space environment test. This requires that the motion mechanism can operate reliably in vacuum and cryogenic environment. In this paper, the structure design of a five-degree of freedom motion mechanism in vacuum and low-temperature environment is presented. Through special selection, vacuum lubrication and local thermal control, the problem of adaptability design of the motion mechanism in vacuum and low-temperature environment is solved. Experiments show that the design method can ensure the normal operation of the motion mechanism in vacuum and low-temperature environment with of $5 times 10^{-4} mathrm{Pa}$ and $-196^{circ} mathrm{C}$. The results can provide reference for the design of motion mechanism under similar vacuum and low-temperature environment.","PeriodicalId":374943,"journal":{"name":"2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS)","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124550471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Investigation of machining flaw of transverse micro-grooves on the control effect of boundary layer instability 横向微槽加工缺陷对边界层失稳控制效果的研究
2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS) Pub Date : 2021-10-01 DOI: 10.1109/icmeas54189.2021.00035
Yong Liu, Qi Long-Guo, Guo Hua-Tu, Qiang Yang, Xian Xu-Yuan, Bing Bing-Wan
{"title":"Investigation of machining flaw of transverse micro-grooves on the control effect of boundary layer instability","authors":"Yong Liu, Qi Long-Guo, Guo Hua-Tu, Qiang Yang, Xian Xu-Yuan, Bing Bing-Wan","doi":"10.1109/icmeas54189.2021.00035","DOIUrl":"https://doi.org/10.1109/icmeas54189.2021.00035","url":null,"abstract":"Local machining flaw of transverse rectangular micro-grooves is investigated from the viewpoint of suppressing the second mode disturbances of a hypersonic boundary layer. The effect of local deformed micro-grooves on boundary layer stability was studied by the direct numerical simulation (DNS) where the second mode disturbances are imposed to the base flow of the boundary layer. The results showed that compression waves and expansion waves were generated on the surface of the deformed micro-groove. Micro-scale separation bubbles may appear at the rear edge of the deformed micro-grooves. The results show that the local deformation of micro-grooves is more effective in suppressing the second mode waves than the corresponding regular one. With the increase of the deformation height, the suppressing effect becomes great. Compared with the regular rectangular micro-grooves, the amplitude inhibition rate of the local deformation micro-grooves to the second mode disturbance can reach 19.6%.","PeriodicalId":374943,"journal":{"name":"2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131815052","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Comprehensive Solution to Improve the Efficiency of the LNG Energy Complex Through the Use Cold Energy of Cryoproducts 通过使用冷冻产品的冷能提高LNG能源综合体效率的综合解决方案
2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS) Pub Date : 2021-10-01 DOI: 10.1109/icmeas54189.2021.00039
O. Tremkina, O. A. Manakova, R. Panshin
{"title":"Comprehensive Solution to Improve the Efficiency of the LNG Energy Complex Through the Use Cold Energy of Cryoproducts","authors":"O. Tremkina, O. A. Manakova, R. Panshin","doi":"10.1109/icmeas54189.2021.00039","DOIUrl":"https://doi.org/10.1109/icmeas54189.2021.00039","url":null,"abstract":"In this paper, the object of the study is a power complex, which includes a set of several circuits, to provide electricity to settlements or human facilities. The scheme of this complex consists of the main circuit (gas piston power unit [1]), auxiliary power unit (air separation unit (ASU) [2]), multistage expansion and steam power units using argon and oxygen as working substances. Liquid methane is used as the main fuel. The energy performance of auxiliary steam-power plants operating with cryogenic working bodies has been calculated, and an index of influence of heat exchange apparatus parameters on working body temperatures has also been found.","PeriodicalId":374943,"journal":{"name":"2021 7th International Conference on Mechanical Engineering and Automation Science (ICMEAS)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133206602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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