应用力学与材料卷。900

纸张标题

Authors: Yao Tien Huang, Kun Nan Chen, Ying Chieh Liu
文摘:介绍了柔性飞轮总成用于the powertrain of an automatic-shifting automobile connects the engine crankshaft and the torque converter and provides a protection to potentially damaging axial movement between the crankshaft and the torque converter. In this research, a fully parameterized model of a flexible flywheel assembly is created, and then optimum design procedures with a zero-order optimization scheme are applied to investigate two cases: the first is to maximize a summation of modal frequencies of the structure; the second is to minimize the maximum equivalent stress in the model. Both optimum design cases have shown improvement in their objective functions, with one of the modes in the first case achieving the greatest improvement of +45.7%.
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Authors: Yunn Lin Hwang, Thi Na Ta
摘要:机械系统性能的不确定度受到质量,刚度阻尼系数和摩擦系数的系统成分的性能的强烈影响。基于计算模拟,可以估计在不确定条件下的系统性能。然而,在数值模拟中难以模拟摩擦的非线性动态行为,因此采用平滑的粘滑摩擦力模型而不是库仑摩擦力模型。建议蒙特卡罗模拟(MCS)与多体动态(MBD)模拟相结合,以评估两个接触体之间的系统部件和粘滑摩擦力的不确定性特性。应用了数值模拟所提出的方法,以考虑摩擦系数不确定度对三轴CNC(计算机数控)机床的加工精度的影响。
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作者:van thuan truong,云恩林明明,金匡成,汗杜龙镇
摘要:本研究通过数值模拟提出了大型液压缸致动器的动态分析。采用动态参数构建的执行器的模型是在流体力学和振动理论上实现的。其中,考虑了通过压缩性和液压油的可压缩性产生的粘性阻尼和刚度的系数。因此,可以通过相同的质量模型来研究大规模的液压缸致动器。为了获得系统响应,使用一些现实的执行器参数集来完成数值模拟。结果与现实一致,可用作大型液压缸执行器设计的有价值的基础。
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Authors: Jun Zhang, Wen Jun Meng, Shi Tao, Zhi Fu Guo, Peng Fei Ji, Kai Ping Zhou, Xiao Hui Gao
Abstract: In this paper, two kinds of spatial position and attitude controllers based on fractional order algorithm and algorithm are designed. Based on the basic assumptions, the model is established and the control of the spatial positioning of the manipulator is studied. The control effects of traditional controller and fractional order controller are analyzed and compared by numerical simulation method. At the same time, the effects of parameters and of fractional order controller and controller on system performance are simulated and analyzed. The results show that the fractional order controller has faster and better robustness than the traditional controller. The research of fractional order controller has become a new method to predict the space trajectory tracking and positioning of the manipulator and to ensure the positioning accuracy of the manipulator.
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作者:Long Chang Hsieh,Tzu Hsia Chen,Po Cheng Lai
摘要:模具夹紧机构是注塑机的重要机制,具有良好运动特性的模具夹紧机构是设计喷射机时的目标。传统上,模具夹紧机构必须在夹紧位置具有至少一个折动效果;当模具处于打开位置时,模具夹紧机构不需要具有切换效果。在本文中,使用了现有专利的2个机制来说明模具夹紧机构的尺寸合成和运动学分析,具有夹紧位置的双重折叠效应。运动的运动特征n机制优于1stmechanism.
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Authors: Yunn Lin Hwang, Jung Kuang Cheng, Thanh Dat Pham
摘要:近几十年来,工业机器人的仿真和应用很快。随着计算机科学的发展,已经创建了大量的软件来执行动态模拟。仿真结果可用于布局评估,运动,动态研究,离线编程,以避免机器人的障碍和设计机械结构。通过Recurdyn和Matlab进行了2R工业机器人的共模。输入参数在MATLAB下执行,然后导出到Recurdyn环境。KineMatic参数将由Recurdyn执行,然后将其导出到Matlab。本文的主要任务是在两个姿势中执行2R机器人操纵器运动仿真,同时轨迹和同时。因此,可以将模拟结果与理论进行比较。最后,使用真实的2R机器人模型来验证CAE仿真的轨迹。
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