共查询到20条相似文献,搜索用时 78 毫秒
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主从式手术机器人映射关系的设计与优化是提高术者操作效率,减少手术疲劳的关键步骤之一,过去通常依靠机器人搭建完成后基于实体手术平台进行评价,延长了研发周期。以微创手术机器人映射关系为研究对象,选择胆囊切除术作为采样标本,运用微型传感通过临床手术实际测量获得典型器械运动轨迹,综合分析得出手术安全域内运动范围,并运用人机工程分析平台DELMIA,采用我国国家标准人体测量数据为人体建模参数,建立国人典型人体运动模型,通过设定不同映射比例,基于反向运动学计算获得手术机器人环境下典型手术过程中术者姿势与上肢运动轨迹,应用RULA分析对不同映射比例下术者的双侧上肢的疲劳程度进行评估,从而获取特定映射关系下人机界面最佳的映射比例,为微创手术机器人针对人机界面优化的设计制造提出了新的评价方法,为缩短器械设计修改流程、加快器械开发速度提出了新的途径。 相似文献
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飞机装配仿真中数字人模型及工人姿态的模拟 总被引:1,自引:0,他引:1
由于飞机的结构及其制造工艺复杂,制造过程中的工艺性问题和人机问题时有发生。采用数字人和计算机仿真技术,模拟飞机制造中工人的作业姿势,为在生产准备阶段提前发现这些问题提供直观的分析和判断依据,也为进一步定量评估飞机制造中工人的劳动生产率提供基础。在详细分析人体自然解剖结构的基础上,提出和建立适用姿态模拟和分析的人体参数化模型,定义姿态元新概念,并用这一概念建立人体姿态的表示模型;然后,利用面向对象的软件设计思想和开发工具,实现所建立的数字人模型,并应用开发的结果模拟飞机装配制造中常见的工人作业姿势。 相似文献
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参考GB/T12985-1991取男性90%与女性10%人体尺寸作为尺寸上、下限值,建立中国人体数字模型.针对MCNC-1存在的人机问题,运用CATIA V5对其作业空间进行分析.从上肢空间伸展范围、操作姿势、显示区域等方面进行评价,发现设计中存在的问题,提出改进设计的依据,为数控机床的人机界面设计奠定了基础. 相似文献
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机舱是船舶能够在海上航行的动力来源,其能否高效且安全的运转是发挥船舶航行性能的关键。然而,由于为了机舱中布置更多的机械设备,导致留给人的空间非常狭小,且工作环境异常恶劣,通常处于高温、高压、高湿度、高噪音的状态。这多变的复杂环境给船员开展工作带来了更大的压力,加剧了人体疲劳的产生,从而影响工作状态降低工作效率。本文以疲劳概念为抓手,对其定义、分类、表现形式和反应机理进行分析,探讨疲劳对船员作业产生的影响,提出相应的改善措施。 相似文献
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基于虚拟仪器的虚拟实验及其进展 总被引:1,自引:1,他引:1
虚拟仪器是在仪器仪表领域中应用计算机技术所形成的一种新型的仪器种类;基于虚拟仪器可以构建种类繁多、功能齐全的虚拟实验系统。简要介绍了虚拟仪器的发展概况和基于虚拟仪器的虚拟实验及其展望。 相似文献
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Theoretical and experimental analysis on super precision grinding of monocrystal silicon 总被引:1,自引:0,他引:1
Guo Xiaoguang Guo Dongming Kang Renke Jin Zhuji 《Frontiers of Mechanical Engineering in China》2007,2(2):137-143
Through investigating the diamond-silicon grinding system, the grinding mechanism, including chip removal and subsurface damage,
is discussed with the aid of the molecular dynamics (MD) approach and grinding experiments. Based on MD simulation, nanometric-grinding
mechanism is analyzed from the viewpoint of instantaneous distribution of atoms, grinding force, and the potential energy
between atoms and the profile of the groove. The simulation results show that some silicon atoms are deformed and piled up
in front and on two sides of the abrasive surface because of the extrusion and cutting. When the energy in silicon lattice
reaches its maximum value, the bonds of silicon atoms are broken and the material is removed. With the advancement of the
abrasive, the silicon lattice under the abrasive surface is fractured, and then the amorphous layers are formed and propagated,
which causes the subsurface damage. At the same time, some amorphous atoms are reconstructed and the degenerating layer of
the machined surface is formed. Besides, the recovery of elatstic deformation occurs in the machined surface of the workpiece.
In addition, the grinding experiment and profile detection with the aid of the measurement for 3D profiling are performed
to verify the simulation results. The good agreement in the profile of the groove between the experimental value and the simulating
value shows that MD simulation is very effective and reliable, and successful to fulfill the investigation on nanometric machining
mechanism. 相似文献
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Neville K.S. Lee Yingfei An Fugee Tsung 《The International Journal of Advanced Manufacturing Technology》2005,25(5-6):493-499
The screw-fastening assembly process is one of the most widely used fastening methods in industrial assembly. However, little research has been conducted in this area in terms of the effect of the screw-fastening process on the assembly accuracy. In this paper, statistical experimental design and data analysis have been performed to study the effect of the screw-fastening process on the assembly accuracy using a multi-dimensional high-resolution optical position monitoring system in a controlled environment. In our study, we observe that an order of magnitude difference (ranging from about 1 μm to over 10 μm) in the assembly accuracy may result using different screw-fastening conditions, and our analysis shows that, number of screws, datum pins, washer and holding force are the important factors affecting assembly accuracy during the screw-fastening process. 相似文献
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介绍多个实验室间对电梯平衡系数比对试验及其检测结果的两种评价方法:不确定度评价法和Robust评价法。通过两种评价方法的数据对比,得出其应用范围。 相似文献
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油膜厚度是油气润滑中一个非常重要的评价指标。利用油气润滑实验台,结合ECT电容电析成像技术,在正交实验法的基础上研究了不同供气压力、单次供油量和单次供油间歇时间三个润滑系统参数对水平油管中油气两相流油膜厚度的影响。实验结果表明:在实验研究的影响参数中,供气压力对于油膜厚度影响作用最大,单次供油间歇时间次之,单次供油量对油膜厚度的影响作用最小;同时在实验研究参数选取的范围内,得出最薄油膜厚度的实验条件为:供气压力0.4 MPa、单次供油量2 mL、单次供油时间间隔15 s。 相似文献