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Modeling and analysis of steady-state vibration induced by backlash in servo rotary table

Xiao YANG,Dun LU,Sanli LIU,Jun ZHANG,Wanhua ZHAO

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 1, Pages 43-47 doi: 10.1007/s11465-015-0327-0

Abstract: This paper presents a mathematical model of a servo rotary table, considering the effect of backlash.

Keywords： backlash servo rotary table steady-state vibration

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Design and analysis of a new high frequency double-servo direct drive rotary valve

Muzhi ZHU,Shengdun ZHAO,Jingxiang LI

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4, Pages 344-350 doi: 10.1007/s11465-016-0406-x

Abstract: The structure of the rotary valve has received considerable research interest because of its favorableThis paper studied the high frequency double-servo direct drive rotary valve (DDRV), and proposed a novelServo motors are integrated into the valve by the innovative structure, which is designed to equilibrate

Keywords： direct drive rotary valve computational fluid dynamics (CFD) flow regulation

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Study on dynamics of rotary swaging machine driven by servo motor

Song Tao,Zhao Shengdun,Yan Guanhai,Liu Hongbao

Strategic Study of CAE 2013, Volume 15, Issue 1, Pages 63-67

Abstract:

In this paper, the servo motor driven swaging machine was designed; profile of striker was

Keywords： rotary swaging servo drive upper bound method

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Dynamic characteristics of an NC table with phase space reconstruction

Linhong WANG, Bo WU, Runsheng DU, Shuzi YANG

Frontiers of Mechanical Engineering 2009, Volume 4, Issue 2, Pages 179-183 doi: 10.1007/s11465-009-0018-9

Abstract: The dynamic properties of a numerical control (NC) table directly interfere with the accuracy and surfacethe correlation dimension, maximum Lyapunov exponent, and dynamic time series measured from the NC tableThe chaotic characteristic of the dynamic properties of the NC table is revealed via various approachesTherefore, an NC table is a nonlinear dynamic system.

Keywords： NC table chaotic characteristic phase-space reconstruction correlation dimension maximum Lyapunov exponent

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Model-based nonlinear control of hydraulic servo systems: Challenges, developments and perspectives

Jianyong YAO

Frontiers of Mechanical Engineering 2018, Volume 13, Issue 2, Pages 179-210 doi: 10.1007/s11465-018-0464-3

Abstract:

Hydraulic servo system plays a significant role in industries, and usually acts as a core point intheory-based control methods have been well established, advanced controller design methods for hydraulic servoand makes model-based nonlinear control more attractive, due to benefit from prior knowledge of the servochallenges in model-based nonlinear control, latest developments and brief perspectives of hydraulic servomeasurement noise, constraints, inner valve dynamics, input nonlinearity, etc.) in nonlinear hydraulic servo

Keywords： hydraulic servo system adaptive control robust control nonlinear friction disturbance compensation repetitive

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Soybean drying characteristics in microwave rotary dryer with forced convection

Ruifang WANG, Zhanyong LI, Yanhua LI, Jingsheng YE

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 3, Pages 289-292 doi: 10.1007/s11705-009-0022-y

Abstract: A new hybrid drying technique by combining microwave and forced convection drying within a rotary drum, i.e., microwave rotary drying, was developed with the purpose to improve the uniformity of microwaveIn a laboratory microwave rotary dryer, rewetted soybean was utilized as experimental material to study

Keywords： cracking microwave rotary drying soybean

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Dynamic characteristics of NC table with SVD

WANG Linhong, WU Bo, DU Runsheng, YANG Shuzi

Frontiers of Mechanical Engineering 2008, Volume 3, Issue 4, Pages 385-391 doi: 10.1007/s11465-008-0052-z

Abstract: (singular value decomposition) method to study dynamic characteristics of a numerical control (NC) tableAcceleration signals of the NC table at three directions are tested; the singular spectrum of the signalsSignal at the perpendicular direction of the table is significantly correlated with that at the horizontal

Keywords： Acceleration vibration source chaotic energy dynamic

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Gray-box modeling and QFT control for precision servo transmission systems

Xiulan BAO, Xuedong CHEN, Xin LUO, Haocheng ZUO

Frontiers of Mechanical Engineering 2011, Volume 6, Issue 4, Pages 442-448 doi: 10.1007/s11465-011-0242-y

Abstract:

Precision servo transmission systems have widely been applied in industrial equipment to achieve highHowever, due to the presence of friction and uncertainty, the characteristics of precision servo transmissionThis paper proposes two-degrees of freedom (2-DOF) robust position controller for a precision servo transmission

Keywords： precision servo transmission system modeling set membership identification quantitative feedback theory

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Control algorithm of a servo platform

Shouyong XIE, Xiwen LI, Shuzi YANG, Mingjin YANG,

Frontiers of Mechanical Engineering 2010, Volume 5, Issue 3, Pages 353-355 doi: 10.1007/s11465-010-0098-6

Abstract: According to the characteristics of the movement of a special-purpose three-axis servo platform, thisThe control algorithm meets all requirements of the control system of the special-purpose three-axis servo

Keywords： grey prediction proportional integral derivative (PID) control improved algorithm weight servo platform

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The application of DX rotary and squeezed pile on railway bridge engineering

Zhang Dehua,Wang Mengshu

Strategic Study of CAE 2009, Volume 11, Issue 7, Pages 92-96

Abstract:

Squeezed pile with plates (being DX pile) is a new type pile that has been developed in recent years. Based on common cast-in-place pile, it adequately avails itself of the bearing capacity of each soil hard layer. According to the difference of design bearing capacity and engineering geological condition, it consists of plates by the squeezing equipment of hydraulic pressure in the different parts of DX pile. DX pile is a sort of change-section pile and is priority to shaft resistance between friction pile and shaft pile. Making use of the tip resistance of breaches and plates and shaft resistance around the branches is in order to add the shaft resistance and tip resistance. In situ test has shown that it can sharply improve the bearing capacity of pile. DX squeezed pile cannot only be applied in clay, silt, sand, weathering rock mass and residual deposits of soil, but also can be used in interactive layers of gravel,clay,and sand. The diameter of DX squeezed pile can be 400~2 000 mm,and the length of it can be more than 60 m. It is a new type of pile which has a bright future for application. Now it has got the extensive application in high building, bridge,civil engineering and high structure. Due to it's good bearing capacity and low settlements,it can an be applied and promoted to different foundation engineering of railway bridge engineering,and would get a good prospect of application and extension.

Keywords： DX pile DX rotary and squeezed pile bearing capacity

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Effectiveness analysis and optimum design of the rotary regenerator for thermophotovoltaic (TPV) system

Xi WU, Hong YE, Jianxiang WANG, Jie HE, Jian YANG

Frontiers in Energy 2012, Volume 6, Issue 2, Pages 193-199 doi: 10.1007/s11708-012-0184-z

Abstract: The influence of the period of rotation on the effectiveness of the thermophotovoltaic (TPV) rotary regeneratorBased on the modified model, the influence of geometrical parameters of rotary regenerator on the effectivenessThe results demonstrate that the effectiveness increases with the increase of the rotary regenerator

Keywords： thermophotovoltaic (TPV) system rotary regenerator effectiveness carryover loss

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Performance of rolling piston type rotary compressor using fullerenes (C70) and NiFe

Ruixiang WANG,Yihao ZHANG,Yi LIAO

Frontiers in Energy 2020, Volume 14, Issue 3, Pages 644-648 doi: 10.1007/s11708-017-0453-y

Abstract: A novel way for a compressor to improve its coefficient of performance was proposed in this paper. Fullerenes (C70) and NiFe O nanocomposites were modified by span 80 and dispersed in refrigeration oil by solid grinding (SG). Besides, the tribological properties of the nanocomposites were investigated using a four ball friction tester. The results show that when the mass concentration of fullerenes nanocomposite is higher than 60 ppm and the concentration of nano-oil is 2 g/L, the friction coefficient decreases from 0.13 to 0.06 which means the wear is reduced. The coefficient of performance of the compressor under the air conditioning test condition can be raised by 1.23%.

Keywords： rotary compressor friction coefficient nanocomposite materials coefficient of performance fullerenes

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Co-pyrolysis of sludge and kaolin/zeolite in a rotary kiln: Analysis of stabilizing heavy metals

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 7, doi: 10.1007/s11783-021-1488-1

Abstract:

• Adding kaolin/zeolite promotes the formation of stable heavy metals.

Keywords： Co-pyrolysis Sewage sludge Heavy metals Rotary kiln Immobilization mechanism

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Air bearing center cross gap of neutron stress spectrometer sample table support system

Yang LI,Yunxin WU,Hai GONG,Xiaolei FENG

Frontiers of Mechanical Engineering 2016, Volume 11, Issue 4, Pages 403-411 doi: 10.1007/s11465-016-0405-y

Abstract:

A support system is the main load-bearing component of sample table for neutron stress spectrometerThe neutron stress spectrometer sample table was introduced, and the scheme for air bearing combination

Keywords： neutron stress spectrometer sample table support system air bearing center cross gap simulation experiment

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Novel precision piezoelectric step rotary actuator

LIU Jianfang, YANG Zhigang, ZHAO Hongwei, CHENG Guangming

Frontiers of Mechanical Engineering 2007, Volume 2, Issue 3, Pages 356-360 doi: 10.1007/s11465-007-0062-2

Abstract: A novel piezoelectric (PZT) precision step rotary actuator was developed on the basis of PZT technologydistributed thin flexible hinge to solve problems such as ineffective anchoring/loosening, low step rotaryIt greatly improves the ability to drive the existing PZT step rotary actuator.

Keywords： developed stability ineffective anchoring/loosening technology piezoelectric