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Overall Life Cycle Comprehensive Assessment of Pneumatic and Electric Actuator

Chinese Journal of Mechanical Engineering 2014年第3期27卷 584-594页

作者： zhang yeming CAI Maolin School of Mechanical and Power Engineering Henan Polytechnic University School of Automation Science and Electrical Engineering BeihangUniversity

Pneumatic actuators and electric actuators have almost been applied to all manufacturing industries. The two kinds of actuators can replace each other in most fields, such as the point to point transmission occasion and some rotating occasions. However, there are very few research results about the advantages and disadvantages of two kinds of actuators under the same working conditions so far. In this paper, a novel comprehensive assessment method, named as overall life cycle comprehensive assessment （OLCCA）, is proposed for comparison and assessment of pneumatic and electric actuators. OLCCA contains mechanical properties evaluation （MPE）, life cycle cost analysis based on users （LCCABOU） and life cycle environmental impact analysis （LCEIA） algorithm in order to solve three difficult problems： mechanical properties assessment, cost analysis and environmental impact assessment about actuators. The mechanical properties evaluation of actuators is a multi-objective optimization problem. The fuzzy data quantification and information entropy methods are combined to establish MPE algorithm of actuators. Two kinds of pneumatic actuators and electric actuators with similar bearing capacity and similar work stroke were taken for example to verify the correctness of MPE algorithm. The case study of MPE algorithm for actuators verified its correctness. LCCABOU for actuators is also set up. Considering cost complex structure of pneumatic actuators, public device cost even method （PDCEM） is firstly presented to solve cost division of public devices such as compressors, aftercooler, receivers, etc. LCCABOU method is also effective and verified by the three groups of pneumatic actuators and electric actuators. Finally, LCEIA model of actuators is established for the environmental impact assessment of actuators. LCEIA data collection method and model establishment procedure for actuators are also put forward. With Simapro 7, LCEIA comparison results of six actuators can be obtaine

关键词： actuator mechanical properties evaluation life cycle cost public device cost even method life cycle assessment

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Analysis of Power Matching on Energy Savings of a Pneumatic Rotary Actuator Servo-Control System

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Chinese Journal of Mechanical Engineering 2020年第2期33卷 87-99页

作者： yeming zhang Hongwei Yue Ke Li Maolin Cai School of Mechanical and Power Engineering Henan Polytechnic UniversityJiaozuo 454000China School of Mechanical and Electrical Engineering Harbin Institute of TechnologyHarbin 150001China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

When saving energy in a pneumatic system,the problem of energy losses is usually solved by reducing the air supply *** power-matching method is applied to optimize the air-supply pressure of the pneumatic system,and the energy-saving effect is verified by ***,the experimental platform of a pneumatic rotary actuator servo-control system is built,and the mechanism of the valve-controlled cylinder system is ***,the output power characteristics and load characteristics of the system are derived,and their characteristic curves are *** employed air compressor is considered as a constant-pressure source of a quantitative pump,and the power characteristic of the system is *** power source characteristic curve should envelope the output characteristic curve and load characteristic *** minimum gas supply pressure obtained by power matching represents the optimal gas supply *** comparative experiments under two different gas supply pressure conditions show that the system under the optimal gas supply pressure can greatly reduce energy losses.

关键词： Pneumatic rotary actuator Energy savings Gas supply pressure Characteristic curve Power matching

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Medical Grabbing Servo System with Friction Compensation Based on the Differential Evolution Algorithm

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Chinese Journal of Mechanical Engineering 2021年第6期34卷 316-330页

作者： yeming zhang Kaimin Li Meng Xu Junlei Liu Hongwei Yue School of Mechanical and Power Engineering Henan Polytechnic UniversityJiaozuo454000China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou310027China Orthopedics Department of People’s Liberation Army General Hospital Beijing100853China

This paper introduces a pneumatic finger cylinder servo control system for medical ***,according to the physical structure of the proportional directional valve and the pneumatic cylinder,the state equation of the gas in the servo system was *** Stribeck friction compensation model of a pneumatic finger cylinder controlled by a proportional valve was established and the experimental platform *** allow the system output to bet-ter track the change in the input signal,the flow-gain compensation method was *** this basis,a friction compensation control strategy based on a differential evolution algorithm was proposed and applied to the position control system of a pneumatic finger ***,the strategy was compared with the traditional proportional derivative(PD)strategy and that with friction *** experimental results showed that the position accuracy of the finger cylinder position control system can be improved by using the friction compensation strategy based on the differential evolution algorithm to optimize the PD parameters.

关键词： Position control Friction compensation Differential evolution Parameter optimization

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Study on roasting process of zircon-silica sol ceramic mould

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China Foundry 2011年第2期8卷 187-189页

作者： zhang yeming Zeng Ming Hu Li Liu Xingang zhang Congzheng School of Materials Science and Engineering Xihua University Chengdu 610039 China

Dry stock of silica sol ceramic mould was prepared by using of colloidal moulding technique with an optimized vacuum drying process. Effect of roasting process on the shrinkage rate and compressive strength of zircon-silica sol ceramic mould, and the relationship between the roasting temperature and microstructure of zirconsilica sol ceramic mould were studied. The optimum roasting temperature of zircon-silica sol ceramic mould gained by the experiments is 900~C and the holding time is 2 h. The scanning electron microscope （SEM） observation showed the growth of refractory particles during the roasting process. The occurrence of sintering was observed in the zircon-silica sol ceramic mould when roasting temperature was above 1,000℃.

关键词： zircon-silica sol ceramic mould roasting process shrinkage rate compressive strength SEM

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Interfacial microstructure and properties of diamond/Cu-xCr composites for electronic packaging applications

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Rare Metals 2011年第1期30卷 94-98页

作者： zhang Ximin GUO Hong YIN Fazhang FAN yeming zhang Yongzhong National Engineering Research Center for Nonferrous Metals Composites General Research Institute for Non-ferrous MetalsBeijing 100088China

Diamond/Cu-xCr composites were fabricated by pressure infiltration *** thermal conductivities of diamond/Cu-xCr（x = 0.1,0.5,0.8） composites were above 650 W/mK,higher than that of diamond/Cu *** tensile strengths ranged from 186 to 225 MPa,and the bonding strengths ranged from 400 to 525 *** of Cr element on the thermo-physical properties and interface structures were *** intermediate layer was confirmed as Cr3C2 and the amount of Cr3C2 increased with the increase of Cr concentration in Cu-xCr *** the Cr concentration was up to 0.5 wt.%,the content of the Cr3C2 layer was *** the thickness of the Cr3C2 layer became larger,the composites showed a lower thermal conductivity but higher mechanical *** coefficients of thermal expansion（CTE） of diamond/Cu-xCr（x = 0.1,0.5,0.8） composites were in good agreement with the predictions of the Kerner＇ model.

关键词： composite materials copper interfaces bonding electronic packaging infiltration

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Nonlinear Control of Magnetically Coupled Rodless Cylinder Position Servo System

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Chinese Journal of Mechanical Engineering 2023年第6期36卷 212-229页

作者： yeming zhang Demin Kong Gonghua Jin Yan Shi Maolin Cai Shuping Li Baozhan Lv School of Mechanical and Power Engineering Henan Polytechnic UniversityJiaozuo 454000China State Key Laboratory of Fluid Power and Mechatronic Systems Zhejiang UniversityHangzhou 310027China School of Automation Science and Electrical Engineering Beihang UniversityBeijing 100191China

Magnetically coupled rodless cylinders are widely used in the coordinate positioning of mechanical arms,electro-static paintings,and other industrial ***,they exhibit strong nonlinear characteristics,which lead to low servo control *** this study,a mass-flow equation through the valve port was derived to improve the control performance,considering the characteristics of the dynamics and throttle-hole ***,a fric-tion model combining static,viscous,and Coulomb friction with a zero-velocity interval was *** addition,energy and dynamic models were set for the experimental investigation of the magnetically coupled rodless cylin-der.A nonlinear mathematical model for the position of the magnetically coupled rodless cylinder was *** incremental PID controller was designed for the magnetically coupled rodless cylinder to control this system,and the PID parameters were adjusted online using RBF neural *** response results of the PID parameters based on the RBF neural network were compared with those of the traditional incremental PID control,which proved the superiority of the optimization control algorithm of the incremental PID parameters based on the RBF neural network servo control *** experimental results of this model were compared with the simulation *** average error between the established model and the actual system was 0.005175054(m),which was approximately 2.588%of the total travel length,demonstrating the accuracy of the theoretical model.

关键词： Magnetically coupled rodless cylinder Nonlinear model Position control Radial basis function neural network(RBF-NN) Neural network(NN)

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Sm-Nd,Pb-Pb and Rb-Sr Isotopic Dating and Its Dynamic Implications for the Proterozoic Augen Granite in the Yunkai Area,Western Guangdong Province

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Acta Geologica Sinica(English Edition) 2000年第2期74卷 289-296页

作者： PENG Songbai zhang yeming ZHAN Mingguo CHEN Fuwen QIU Ruizhao Yichang Institute of Geology and Mineral Resources CAGSYichang 443003Hubei

The samples of ductile-rheologic deformational augen granite from the Yunkai uplift area, western Guangdong province, were determined by the whole-rock Sm-Nd, Pb-Pb and Rb-Sr isotopic dating to have an Sm-Nd isochron age of 1414±68 Ma, a Pb-Pb isochron age of 1388±90 Ma and a Rb-Sr isochron age of 490±36 Ma. The first two ages are interpreted as the formation age of this suite of granite and the last age represents the timing of the tectono-thermal event of Caledonian ductile-rheologic shear partial melting. It is indicated that in the study area not only an orogeny took place in the Caledonian, but also a more important tectono-magmatic activity occurred in the Meso-proterozoic there, which may be related to the subduction-collision between the Yangtze block and Cathaysia block.

关键词： Yunkai area Proterozoic augen granite isotopic dating ductile-rheologic shear

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超大型多水源原水输水工程调度系统的设计及探讨

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给水排水 2014年第8期40卷 120-125页

作者：张晔明上海市政工程设计研究总院(集团)有限公司上海200092

介绍了上海市中心城区原水供应系统调度系统总体设计思路及相关系统设计概况。结合智慧水网的发展趋势,以系统的安全、节能运行为出发点,以青草沙原水供应系统中的严桥支线为研究对象,探讨了如何进一步实现科学化智能调度的关键技术要点... 详细信息

介绍了上海市中心城区原水供应系统调度系统总体设计思路及相关系统设计概况。结合智慧水网的发展趋势,以系统的安全、节能运行为出发点,以青草沙原水供应系统中的严桥支线为研究对象,探讨了如何进一步实现科学化智能调度的关键技术要点,用以实现调度目标的智能预测,调度方案智能优化,事故预案自动生成,系统健康自动评估,节能运行方案的自动生成及效果跟踪,最终实现原水调度综合管理平台的智能化。

关键词：超大型原水输水系统调度系统智能调度智能预测节能 SOA构架微观水力模型上海市中心城区

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基于最小二乘法的执行器系统机械属性评价

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北京航空航天大学学报 2014年第7期40卷 881-886页

作者：张业明蔡茂林河南理工大学机械与动力工程学院焦作454000 北京航空航天大学自动化科学与电气工程学院北京100191

分析了机械属性评价方法的优缺点,给出了气动执行器和电动执行器系统机械属性的主要评价因素,并列出了执行器系统评价因素数据获取的3个途径,提出了一种基于最小二乘法的执行器系统组合权重机械属性评价方法.首先运用信息熵理论和层次... 详细信息

分析了机械属性评价方法的优缺点,给出了气动执行器和电动执行器系统机械属性的主要评价因素,并列出了执行器系统评价因素数据获取的3个途径,提出了一种基于最小二乘法的执行器系统组合权重机械属性评价方法.首先运用信息熵理论和层次分析法(AHP,Analytic Hierarchy Process)理论,分别得到两种执行器系统的机械属性权重,然后运用最小二乘法求得执行器系统的组合权重,计算出执行器系统综合评价值,选出最优方案,最后运用具体实例进行了评价方法验证.结果表明,以特定工况下的气动和电动执行器系统为例,运用组合权重机械属性评价方法,得出气动执行器系统比电动执行器系统机械属性更好,符合现场工况;执行器系统的组合权重机械属性评价结果的标准偏差比信息熵和层次分析-模糊综合评价(AHP-FCE,AHP-Fuzzy Comprehensive Evaluation)的都小.

关键词：执行器机械属性最小二乘法信息熵组合权重

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基于Simapro的气动与电动执行器生命周期评价

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北京航空航天大学学报 2014年第12期40卷 1685-1690页

作者：张业明蔡茂林河南理工大学机械与动力工程学院焦作454000 北京航空航天大学自动化科学与电气工程学院北京100191

在机械性能和工况相近的情况下,对3组气动执行器和电动执行器进行生命周期评价(LCA,Life Cycle Assessment),分析了气动和电动执行器的环境影响评价主要因素,确定了两种执行器的LCA研究范围、系统边界和时间边界,归纳了两种执行器制造... 详细信息

在机械性能和工况相近的情况下,对3组气动执行器和电动执行器进行生命周期评价(LCA,Life Cycle Assessment),分析了气动和电动执行器的环境影响评价主要因素,确定了两种执行器的LCA研究范围、系统边界和时间边界,归纳了两种执行器制造过程的主要工艺和零部件的工艺特征,最后在Simapro 7.1中进行了两种执行器的评价框架建立和数据录入,根据Eco-indicator 99进行了两种执行器LCA对比分析.结果表明,执行器对资源的环境影响约占环境影响综合值的50%;机械性能和工况相近的气动和电动执行器,电动执行器的环境影响比气动执行器大.

关键词：气动执行器电动执行器制造工艺环境影响评价生命周期评价

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