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浏览/检索结果: 共6条，第1-6条 帮助 已选(0)清除 条数/页：5101520253035404550556065707580859095100   排序方式：请选择作者升序作者降序题名升序题名降序发表日期升序发表日期降序提交时间升序提交时间降序 Slow axis collimation lens with variable curvature radius for semiconductor laser bars 期刊论文 optics and laser technology, 2016, 卷号: 77, 页码: 1-5 作者:  Xiong, Ling-Ling;  Cai, Lei;  Zheng, Yan-Fang;  Liu, Hui;  Zhang, Pu 收藏  |  浏览/下载：30/0  |  提交时间：2016/01/11 Semiconductor laser  Variable curvature radius  Slow axis collimation lens  Constant phase front  Transmission angle   Research on the algorithm of concave fillet auto decreasing in panel die 期刊论文 International Journal of Simulation: Systems, Science and Technology, 2016, 卷号: 17, 期号: 5, 页码: 11.1-11.7 作者:  Zhang, Shan-Hui;  Xu, Wei;  Wei, Wei 收藏  |  浏览/下载：2/0  |  提交时间：2019/12/16 Fillet decreasing  Panel die  Surface-surface fillet creation  Variable radius   A new algorithm for solving the best-fit sphere of optical aspherical surface (EI CONFERENCE) 会议论文 2nd International Conference on Advances in Materials and Manufacturing, ICAMMP 2011, December 16, 2011 - December 18, 2011, Guilin, China Lin J.; Yang J.; Lu M. 收藏  |  浏览/下载：30/0  |  提交时间：2013/03/25 To solve the best-fit sphere (BFS) accurately is one of the technological keys for the generating and testing of optical aspherical surfaces. This paper presents a new algorithm for solving the BFS of aspherical surfaces to suppress some deficiencies in the existing BFS algorithms. In the proposed approach  it is not only suitable for the conic surface  a BFS is constructed  but also for higher order aspheres. The obtained asphericity and material removal function is more suitable for the machining and test. (2012) Trans Tech Publications  which passes through both sides of endpoints in the section o -?xy of the aspherical surfaces  Switzerland.  the center of the BFS is shifted along the x-axis  and its radius of curvature is automatically computed. The variable step size method is proposed to speed up the convergence of the iteration. Through numerically solving the BFS of conic and cubic surface  the advantages of the proposed approach are verified. The results show that the proposed approach is of rapid convergence  and high accuracy   Effect of improved stator curve on characteristic of high-pressure intra-vane type pump 期刊论文 Nongye Jixie Xuebao/Transactions of the Chinese Society of Agricultural Machinery, 2012, 卷号: 43, 期号: 1, 页码: 219-223 作者:  Li, Shaonian;  Wei, Liejiang;  Ji, Hong;  Wang, Zhengrong;  Na, Yanqing 收藏  |  浏览/下载：15/0  |  提交时间：2020/11/14 High pressure effects  Vane pumps  Contract force  Dynamics characteristic  Flow  Flow charac-teristics  Stator curves  Transition curves  Variable radius  Velocity curves   Influence of equivalent prewhirl radius of guide vane passage on performance of centrifugal compressor 期刊论文 Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University, 2011, 卷号: 45, 期号: [db:dc_citation_issue] 作者:  Liu, Tianyi;  Qi, Datong;  Tan, Jiajian;  Wang, Rui;  Han, Fenghui 收藏  |  浏览/下载：3/0  |  提交时间：2019/12/10 Centrifugal compressor  Equivalent prewhirl radius  Guide vane passage  Variable inlet guide vanes   Study on navigation control method for CyberCar based on machine vision (EI CONFERENCE) 会议论文 2007 IEEE International Conference on Robotics and Biomimetics, ROBIO, December 15, 2007 - December 18, 2007, Yalong Bay, Sanya, China Zhang R.-H.; Wang R.-B.; You F.; Jia H.-G.; Chen T. 收藏  |  浏览/下载：18/0  |  提交时间：2013/03/25 The guiding principle and composition of CyberCar based on machine vision was introduced. Applying IM sequence signals as input response signals and least squares method to establish the dynamic equation for CyberCar steering system by system identification experiments firstly  and then combined with the preview kinematics model and two-degree steering dynamic model of vehicle. Therefore  it can trace the path steadily and reliably. 2008 IEEE.  the steering control mathematics model based on preview kinematics for CyberCar was established. And then the switching hyper plane is designed by applying the optimal control theory  during the change of the curve curvature radius is little  the curve tracking of the intelligent vehicle is carried out by adopting sliding variable structure controller. Aim at the parameter uncertainty of tire  a vehicle steering system uncertain model was founded and analyzed. A H optimal controller is designed with the method of H control theory to solve the problem about model uncertainty. The simulation and experiment results show that the controller designed by the proposed method has good robustness and adaptability