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Design and analysis of a class of redundant collaborative manipulators with 2-dimension large rotationalangles

Xiaodong JIN, Yuefa FANG, Dan ZHANG, Xueling LUO

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 1,   Pages 66-80 doi: 10.1007/s11465-019-0570-x

Abstract: The parallel spindle heads with high rotational capability are demanded in the area of multi-axis machineparallel spindle heads and the corresponding collaborative 5-axis manipulators with 2-dimension (2D) largerotational angles.In order to provide constant rotational axis for the platform, a class of redundant limbs are designedThe results show that these manipulators have large 2D rotational angles than the traditional A3/Z3 heads

Keywords： parallel mechanism     redundant mechanism     large rotational angles     machine tools     2R1T spindle head     collaborative    

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Soft curvature sensors for measuring the rotational angles of mechanical fingers

Haixiao LIU, Li LI, Zhikang OUYANG, Wei SUN

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 4,   Pages 610-621 doi: 10.1007/s11465-020-0596-0

Abstract: The design, fabrication, and testing of soft sensors that measure elastomer curvature and mechanical finger bending are described in this study. The base of the soft sensors is polydimethylsiloxane (PDMS), which is a translucent elastomer. The main body of the soft sensors consists of three layers of silicone rubber plate, and the sensing element is a microchannel filled with gallium-indium-tin (Ga-In-Sn) alloy, which is embedded in the elastomer. First, the working principle of soft sensors is investigated, and their structure is designed. Second, the relationship between curvature and resistance is determined. Third, several sensors with different specifications are built in accordance with the structural design. Experiments show that the sensors exhibit high accuracy when the curvature changes within a certain range. Lastly, the soft sensors are applied to the measurement of mechanical finger bending. Experiments show that soft curvature sensors can effectively reflect mechanical finger bending and can be used to measure the bending of mechanical fingers with high sensitivity within a certain working range.

Keywords： soft sensor     Ga-In-Sn alloy     strain sensing     curvature sensing     mechanical finger bending    

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Scrutiny of non-linear differential equations Euler-Bernoulli beam with large rotational deviation by

M. R. AKBARI,M. NIMAFAR,D. D. GANJI,M. M. AKBARZADE

Frontiers of Mechanical Engineering 2014, Volume 9, Issue 4,   Pages 402-408 doi: 10.1007/s11465-014-0316-8

Abstract: In this study, solving the nonlinear differential equation governing the calculation of the large rotationPreviously to calculate the rotational deviation of the beam, the assumption is made that the angular

Keywords： AGM     critical load of columns     large deformations of beam     nonlinear differential equation    

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Bending and rotational behaviour of semi-continuous composite beams

WANG Jingfeng, LI Guoqiang

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 2,   Pages 116-122 doi: 10.1007/s11709-008-0015-9

Abstract: The bending and rotational capacities of the composite connections were measured in terms of beam curvatures

Keywords： rotational     effective     deflection calculation     semi-continuous composite     full-scale semi-rigid    

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Effect of placement angles on wireless electrocoagulation for bipolar aluminum electrodes

Zhenlian Qi, Jinna Zhang, Shijie You

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 3, doi: 10.1007/s11783-018-1034-y

Abstract: current and potential distribution were carried out along the surface of BPE at different placement angles, revealing the mechanism of different BPE placement angles on aluminum dissolution rates in WEC system

Keywords： Bipolar electrochemistry     Wireless electrocoagulation     Placement angle    

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properties of friction stir welded aluminum alloy joints based on axial force, traverse speed, and rotational

Biranchi PANDA,A. GARG,Zhang JIAN,Akbar HEIDARZADEH,Liang GAO

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 3,   Pages 289-298 doi: 10.1007/s11465-016-0393-y

Abstract: These advantages include the absence of heat formation in the affected zone and the absence of largeExisting literature indicates that tensile properties exhibit strong dependence on the rotational speedis employed to produce the functional relationships between tensile properties and the three inputs (rotationalA high UTS was achieved, including a rotational speed of 1050 r/min and traverse speed of 95 mm/min.

Keywords： tensile properties     ultimate tensile strength     tensile elongation     friction stir welding     tool rotational    

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Investigation into the influence of diffuser stagger angles on the flow field and performance of a centrifugal

XI Guang, DING Haiping, YUAN Minjian, ZHANG Chunmei, ZHOU Li

Frontiers in Energy 2007, Volume 1, Issue 3,   Pages 290-294 doi: 10.1007/s11708-007-0041-7

Abstract: The performance graphs of a centrifugal compressor under different diffuser stagger angles were measured, and the influence of different stagger angles of vanes on the stage performance as well as flow fieldperformance graph shifts when the diffuser stagger angle is altered; the influence of different stagger anglesLarge scale vortices appear on the diffuser vane under larger incidence.

Keywords： diffuser stagger     incidence     different stagger     flow     centrifugal compressor    

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Effects of inclination angles of disc cutter on machining quality of Nomex honeycomb core in ultrasonic

Yidan WANG, Renke KANG, Yan QIN, Qian MENG, Zhigang DONG

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 2,   Pages 285-297 doi: 10.1007/s11465-021-0631-9

Abstract: cutting process with a disc cutter was analyzed, and cutting experiments with different inclination anglesThe theoretical residual height models of the honeycomb core, as a result of the lead and tilt anglesThe determination of inclination angles should consider the actual processing requirements for the residualThis study investigates the influence of the inclination angles of a disc cutter on the machining quality

Keywords： Nomex honeycomb core     disc cutter     inclined ultrasonic cutting     machining quality    

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Micro-angle tilt detection for the rotor of a novel rotational gyroscopewith a 0.47’’ resolution Article

Hai LI, Xiao-wei LIU, Rui WENG, Hai-feng ZHANG

Frontiers of Information Technology & Electronic Engineering 2017, Volume 18, Issue 5,   Pages 591-598 doi: 10.1631/FITEE.1500454

Abstract: the proof mass of vibratory gyroscopes, but it did not achieve high resolutions in angle detection of rotationaldifferential capacitive detection structure is presented to measure the tilt angle of the rotor of a novel rotationalA mathematical model is built to study how the structure’s capacitance changes with the rotor tilt angles

Keywords： Micro-angle detection     Differential capacitive structure     Rotational gyroscope     Structure optimization    

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Fused-like angles: replacement for roll-pitch-yaw angles for a six-degree-of-freedom grating interferometer Research Article

Di Chang, Pengcheng Hu, Jiubin Tan,di.chang@hit.edu.cn,hupc@hit.edu.cn,jbtan@hit.edu.cn

Frontiers of Information Technology & Electronic Engineering 2021, Volume 22, Issue 12,   Pages 1551-1684 doi: 10.1631/FITEE.2000432

Abstract: Roll-pitch-yaw angles, widely used in aviation, navigation, and robotics, are now being brought to theHowever, the roll-pitch-yaw angles are not the exact definitions the metrologists expected in interferometryThe errors increase as the tip and tilt angles of the grating increase.Therefore, a replacement based on fused angles in robotics is proposed and named “.”

Keywords： 无偏溯源角；光栅干涉仪；六自由度测量；角度表达方法    

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Development of an analytical model to estimate the churning losses in high-speed axial piston pumps

Frontiers of Mechanical Engineering 2022, Volume 17, Issue 2, doi: 10.1007/s11465-021-0671-1

Abstract: during operation, leading to considerable churning losses (more than 10% of total power losses) at high rotationalThe calculated drag torque agrees well with the experimental data over a wide range of rotational speeds

Keywords： axial piston pump     rotating parts     high rotational speed     churning losses     drag torque    

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Vibratory behaviors of Jeffcott system on cylindrical roller bearings

Hao WU, Jianwen WANG, Qi AN

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 3,   Pages 305-309 doi: 10.1007/s11465-009-0036-7

Abstract: This means that an oil film will decrease the critical rotational speed of the rotor system.

Keywords： roller bearing     bearing-rotor system     design value     critical rotational speed    

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Features of seismic hazard in large dam projects and strong motion monitoring of large dams

Martin WIELAND,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1,   Pages 56-64 doi: 10.1007/s11709-010-0005-6

Abstract: Earthquakes can affect large dam projects in many different ways.Finally, the need for strong motion instrumentation of large dams is discussed.It is proposed that major dams with large damage potential, dams located in areas of high seismicity,

Keywords： seismic hazard     arch dam     concrete face rockfill dam     strong motion instrumentation     reservoir-triggered seismicity     Wenchuan earthquake    

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Investigation of vortical flows over oscillating body using fast Lagrangian vortex method

Baoshan ZHU ,

Frontiers in Energy 2009, Volume 3, Issue 3,   Pages 297-306 doi: 10.1007/s11708-009-0010-4

Abstract: numerical results of unsteady separated flows which pass a cylinder and a thin cambered blade undergoing rotational

Keywords： unsteady vortical flows     fast vortex method     vortex shedding     rotational oscillation     thin cambered blade    

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Synthesis of hydrophobic carbon nanotubes/reduced graphene oxide composite films by flash light irradiation

Kai Wang, Jinbo Pang, Liwei Li, Shengzhe Zhou, Yuhao Li, Tiezhu Zhang

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 3,   Pages 376-382 doi: 10.1007/s11705-018-1705-z

Abstract:

Carbon nanotubes/graphene composites have superior mechanical, electrical and electrochemistry properties with carbon nanotubes as a hydrophobicity boosting agent. Their extraordinary hydrophobic performance is highly suitable for electrode applications in lithium ion batteries and supercapacitors which often employ organic electrolytes. Also the hydrophobic features enable the oil enrichment for the crude oil separation from seawater. The ever reported synthesis routes towards such a composite either involve complicated multi-step reactions, e.g., chemical vapor depositions, or lead to insufficient extrusion of carbon nanotubes in the chemical reductions of graphene oxide, e.g., fully embedding between the compact graphene oxide sheets. As a consequence, the formation of standalone carbon nanotubes over graphene sheets remains of high interests. Herein we use the facile flash light irradiation method to induce the reduction of graphene oxides in the presence of carbon nanotubes. Photographs, micrographs, X-ray diffraction, infrared spectroscopy and thermogravimetric analysis all indicate that graphene oxides has been reduced. And the contact angle tests confirm the excellent hydrophobic performances of the synthesized carbon nanotube/reduced graphene oxide composite films. This one-step treatment represents a straightforward and high efficiency way for the reduction of carbon nanotubes/graphene oxides composites.

Keywords： carbon nanotubes     graphene composite     flash irradiation method     reduced graphene oxide     contact angles    

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Title Author Date Type Operation

Design and analysis of a class of redundant collaborative manipulators with 2-dimension large rotationalangles

Xiaodong JIN, Yuefa FANG, Dan ZHANG, Xueling LUO

Journal Article

Soft curvature sensors for measuring the rotational angles of mechanical fingers

Haixiao LIU, Li LI, Zhikang OUYANG, Wei SUN

Journal Article

Scrutiny of non-linear differential equations Euler-Bernoulli beam with large rotational deviation by

M. R. AKBARI,M. NIMAFAR,D. D. GANJI,M. M. AKBARZADE

Journal Article

Bending and rotational behaviour of semi-continuous composite beams

WANG Jingfeng, LI Guoqiang

Journal Article

Effect of placement angles on wireless electrocoagulation for bipolar aluminum electrodes

Zhenlian Qi, Jinna Zhang, Shijie You

Journal Article

properties of friction stir welded aluminum alloy joints based on axial force, traverse speed, and rotational

Biranchi PANDA,A. GARG,Zhang JIAN,Akbar HEIDARZADEH,Liang GAO

Journal Article

Investigation into the influence of diffuser stagger angles on the flow field and performance of a centrifugal

XI Guang, DING Haiping, YUAN Minjian, ZHANG Chunmei, ZHOU Li

Journal Article

Effects of inclination angles of disc cutter on machining quality of Nomex honeycomb core in ultrasonic

Yidan WANG, Renke KANG, Yan QIN, Qian MENG, Zhigang DONG

Journal Article

Micro-angle tilt detection for the rotor of a novel rotational gyroscopewith a 0.47’’ resolution

Hai LI, Xiao-wei LIU, Rui WENG, Hai-feng ZHANG

Journal Article

Fused-like angles: replacement for roll-pitch-yaw angles for a six-degree-of-freedom grating interferometer

Di Chang, Pengcheng Hu, Jiubin Tan,di.chang@hit.edu.cn,hupc@hit.edu.cn,jbtan@hit.edu.cn

Journal Article

Development of an analytical model to estimate the churning losses in high-speed axial piston pumps

Journal Article

Vibratory behaviors of Jeffcott system on cylindrical roller bearings

Hao WU, Jianwen WANG, Qi AN

Journal Article

Features of seismic hazard in large dam projects and strong motion monitoring of large dams

Martin WIELAND,

Journal Article

Investigation of vortical flows over oscillating body using fast Lagrangian vortex method

Baoshan ZHU ,

Journal Article

Synthesis of hydrophobic carbon nanotubes/reduced graphene oxide composite films by flash light irradiation

Kai Wang, Jinbo Pang, Liwei Li, Shengzhe Zhou, Yuhao Li, Tiezhu Zhang

Journal Article