Precision Engineering Measurements and Instrumentation最新文献_第7页

Extension of light transmission distance of single core fiber with a micro axicon fixed at fiber end 通过在光纤端固定微轴，延长单芯光纤的光传输距离

Precision Engineering Measurements and Instrumentation Pub Date : 2015-03-06 DOI: 10.1117/12.2084986

Yuanzheng Chen, Tong Zhou, Jiwen Cui, Jiubin Tan

引用次数: 0

Modeling and active vibration control of six-DOF manipulator through μ-synthesis with parameter uncertainties 考虑参数不确定性的六自由度机械臂的μ综合建模与振动主动控制

Precision Engineering Measurements and Instrumentation Pub Date : 2015-03-06 DOI: 10.1117/12.2180664

Kaiping Yu, Ying Wu

引用次数: 5

Double-grating diffraction interferometric stylus probing system for surface proﬁling and roughness measurement 用于表面轮廓和粗糙度测量的双光栅衍射干涉式触头探测系统

Precision Engineering Measurements and Instrumentation Pub Date : 2015-03-06 DOI: 10.1117/12.2180826

Peipei Wei, Zhengang Lu, Lihua Liu

引用次数: 1

Surface profile measurement of microstructures with steep slopes by sample-titling strategy 用取样方法测量陡坡微结构表面轮廓

Precision Engineering Measurements and Instrumentation Pub Date : 2015-03-06 DOI: 10.1117/12.2180891

Bin Xu, Wei Chen, Yubo Huang, Kang‐Xiang Song, Shiping Zhao

引用次数: 0

Optimal design of a touch trigger probe 触控触发探头的优化设计

Precision Engineering Measurements and Instrumentation Pub Date : 2015-03-06 DOI: 10.1117/12.2180866

Ruijun Li, Meng Xiang, K. Fan, Hao Zhou, Jian Feng

引用次数: 1

Research on PID controller with input shaping algorithm for linear motor 带输入整形算法的直线电机PID控制器研究

Precision Engineering Measurements and Instrumentation Pub Date : 2015-03-06 DOI: 10.1117/12.2182387

Yang Liu, Yue Dong, W. Fan, Zhenxian Fu

引用次数: 1

Multi-functional hinge equipped with a magneto-rheological rotary damper for solar array deployment system 用于太阳能电池阵展开系统的带有磁流变旋转阻尼器的多功能铰链

Precision Engineering Measurements and Instrumentation Pub Date : 2015-03-06 DOI: 10.1117/12.2181839

Mingfu Wen, M. Yu, J. Fu, Zheng-Hong Wu

{"title":"Multi-functional hinge equipped with a magneto-rheological rotary damper for solar array deployment system","authors":"Mingfu Wen, M. Yu, J. Fu, Zheng-Hong Wu","doi":"10.1117/12.2181839","DOIUrl":"https://doi.org/10.1117/12.2181839","url":null,"abstract":"This article describes the design and simulation of a novel multi-functional hinge equipped with a rotary magnetorheological damper for solar array deployment system, which is comprised of a hinge, an angular sensor, a positioning and locking mechanism and a rotary damper. In order to achieve the compact design in structure, some components were reused in different function modules. It’s the first to use magnet-rheological fluid (MRF) to dissipate the energy in solar array deployment system. The main advantage in using MR rotary damper instead of a viscous fluid rotary damper is that the damping force of MR damper can be adjusted according to the external magnetic field environment excited. A mechanic model was built and the structure design was focused on the MR rotary damper, a damping force model of this damper is deduced based on hydromechanics with Bingham plastic constitutive model. A simulation of deployment motion was taken to validate the motion sequence of various components during the unfolding and locking process. It can be obtained that a constant damping coefficient can hardly balance the different performance of solar deployment system, then a simulation of the proposed deployment system equipped with rotary MR damper was carried out. According to the simulation, it can be obtained that the terminal velocity decreased by 75.81% and the deployment time decreased by 72.37% compared with a given constant damping coefficients. Therefore, the proposed new type of rotary damper can reach a compromise with different performance utilizing an on-off control strategy.","PeriodicalId":380636,"journal":{"name":"Precision Engineering Measurements and Instrumentation","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131918932","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: 4

Abnormal events detection in crowded scenes by trajectory cluster 基于轨迹聚类的拥挤场景异常事件检测

Precision Engineering Measurements and Instrumentation Pub Date : 2015-03-06 DOI: 10.1117/12.2180725

Shifu Zhou, Zhijiang Zhang, Dan Zeng, Wei Shen

引用次数: 6

The propagation of manufacture uncertainty to dynamic measurement 制造不确定度对动态测量的传播

Precision Engineering Measurements and Instrumentation Pub Date : 2015-03-06 DOI: 10.1117/12.2181409

Jun Wang, Huaxia Deng, Jin Zhang, Liandong Yu

{"title":"The propagation of manufacture uncertainty to dynamic measurement","authors":"Jun Wang, Huaxia Deng, Jin Zhang, Liandong Yu","doi":"10.1117/12.2181409","DOIUrl":"https://doi.org/10.1117/12.2181409","url":null,"abstract":"Uncertainty is the degree of suspicious for correctness or accuracy of measurement results. Parts of the manufacturing error directly affect the structural dynamic characteristics. The propagation of uncertainty in the static measurement from characteristics to the measurement results has been investigated for decades. However, the propagation of manufacture uncertainty to the results of dynamic measurement has been rarely investigated, which is an important issue for the design and tests of structures and equipment. In this paper, the propagation of manufacturing uncertainty to the dynamic measurement is investigated on the basis of modal analysis method. The manufacturing uncertainty here is represented by the tolerance of form and position, which is the difference between actual shape or position and the digital 3D model of geometry shape and position. Tolerance of form and position is an< important indicator to evaluate object geometry size and the relative position in the mechanical design. The uncertainty of the tolerance of form and position is assumed to satisfy Gaussian distribution. The relationship between modal parameters and tolerance is predicted by analyzing transition rules of modal parameters. A series of beams with tolerance of form and position analyzed experiment to verify transitive relation between varied modal parameters in modal analysis and tolerance. The investigation found that the distribution of the uncertainty of the parameters of dynamic measurement, such as the natural frequencies and modal shapes, are not inherently satisfied with Gaussian distribution, although the uncertainty of characteristics are Gaussian distributed, which confirms the difference of uncertainty propagation in the static measurement and dynamic measurement.","PeriodicalId":380636,"journal":{"name":"Precision Engineering Measurements and Instrumentation","volume":"21 7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-03-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125736573","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

Measurement of centering error for probe of swing arm profilometer using a spectral confocal sensor 用光谱共聚焦传感器测量摆臂轮廓仪探头定心误差

Precision Engineering Measurements and Instrumentation Pub Date : 2015-03-06 DOI: 10.1117/12.2180887

Lin Chen, Hongwei Jing, Zhong-wei Wei, X. Cao

引用次数: 1