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Proceedings of the 2019 International Conference on Precision Machining, Non-Traditional Machining and Intelligent Manufacturing (PNTIM 2019)最新文献

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Research on Optimization Method of Facilities Arrangement Based on Backtracking Search Algorithm 基于回溯搜索算法的设施布置优化方法研究
Wei Fengtao, Zhang Yangyang, Shi Yunpeng, Lin Junyu
Aiming at the shortcomings such as large amount of manual calculation and subjective factors of designer in the system layout design commonly used in facility layout design. A method of facility layout optimization based on backtracking search algorithm is proposed. The paper takes a library in university as the object of research, by establishing mathematical model of library facility arrangement, applying backtracking search algorithm to facility layout optimization in the library. After that we obtain the optimal solution of facility layout, and we use F-D graph to compare with the previous solution. The result shows that the solution proposed in the paper is feasible and effective to solve analogous facility planning problems. Keywords-Backtracking Search Optimization Algorithm; Facility Layout; Optimization Design
针对设施布置图设计中常用的系统布置图设计中存在人工计算量大、设计人员主观因素多等缺点。提出了一种基于回溯搜索算法的设施布局优化方法。本文以某高校图书馆为研究对象,通过建立图书馆设施布置的数学模型,将回溯搜索算法应用于图书馆设施布置的优化。得到了设施布局的最优解,并用F-D图与之前的解进行比较。结果表明,本文提出的方法对解决类似的设施规划问题是可行和有效的。关键词:回溯搜索;优化算法;设施布局;优化设计
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引用次数: 0
Maximum Power Extraction and Pitch Angle Control for Offshore Wind Turbine with Open-Loop Hydraulic Transmission 开环液压传动海上风力机最大功率提取及俯仰角控制
Fan Yajun, Mu Anle
This paper aims to extract optimal power from a hydraulic floating wind turbine using torque control and pitch control. When wind speed is below rated value, a nonlinear fuzzy controller is designed to capture maximum wind energy through regulating the displacement of hydraulic pump fixed in nacelle. When wind speed is above rated value, to achieve the pitch angle control and guarantee that the generation system safely works, an adaptive fuzzy controller is built and the stability of the control system has been analyzed through Lyapunov criterion. In order to validate the feasibility of the proposed controllers, the system has been simulated in Matlab/simulink under random wind speeds. The results show that as the wind speed is below the rated value the power coefficient has been kept to the optimal value. Furthermore, the maximum output power has been held near to rated value as the wind speed is above the rated value. Keywords-Offshore Wind Turbine; Hydraulic Transmission; Nonlinear Fuzzy Controller; Adaptive Fuzzy Controller; Optimal Power Extraction
本文的目的是利用转矩控制和俯仰控制对液压浮式风力机进行最优功率提取。当风速低于额定值时,设计了非线性模糊控制器,通过调节固定在机舱内的液压泵的位移来捕获最大的风能。在风速大于额定值时,为实现俯仰角控制,保证发电系统安全运行,构建了自适应模糊控制器,并通过李雅普诺夫准则分析了控制系统的稳定性。为了验证所提控制器的可行性,在Matlab/simulink中对系统进行了随机风速下的仿真。结果表明,当风速低于额定值时,功率系数保持在最优值。当风速大于额定值时,最大输出功率保持在额定值附近。关键词:海上风电;液压传动;非线性模糊控制器;自适应模糊控制器;最佳功率提取
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引用次数: 0
The Design of Climb Stairs to Barrelled Water Trolley 桶装水小车爬梯设计
Yang Zhuoyu, Peng Runling, Yao Mingru, Du Hang
This design is aimed at the difficulty of carrying barreled drinking water. The climbing car takes deformation wheel as the main form and planet wheel as the auxiliary form to climb up. When the deformation wheel turns forward, the inner wheel hub retracted under the control of the motor to realize stair climbing. In reverse rotation, the inner hub stretches, and the two hubs merge into the whole wheel to achieve flat driving. Its grasping mechanism is divided into three parts, which can control the lifting, movement and opening and closing of claws to meet the automatic loading and unloading of bottled drinking water. Keywords-Climbing Car; Wireless Control; Hydraulic Pressure; Automatic Loading And Unloading
本设计是针对桶装饮用水携带困难的问题设计的。爬坡车以变形轮为主要形式,行星轮为辅助形式进行爬坡。当变形轮向前转动时,内轮毂在电机的控制下缩回,实现爬楼梯。在反向旋转时,内轮毂伸展,两个轮毂合并成整个车轮,实现平行驶。其抓取机构分为三部分,可控制抓取爪的升降、移动和启闭,以满足瓶装饮用水的自动装卸。Keywords-Climbing汽车;无线控制;液压;自动装卸
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引用次数: 0
Electric Larceny Detection Based on Support Vector Machine 基于支持向量机的电盗窃检测
Li Songnong, Zeng Yan, Ye Jun, S. Hongliang
The design and application of power system line loss calculation and lean management system have important guiding significance in guiding loss reduction and energy saving and promoting line loss management. In recent years, the electric energy data acquire system, as a tool that can effectively meet the power enterprise's demand for power consumption information, has also accumulated a large amount of user power consumption data while meeting the power supply marketing automation needs. These power consumption data contain huge user power usage information. Therefore, the user data collected by the power electric energy data acquire system can be analyzed and processed to identify users with high suspicion of power severance, so as to reduce the management line loss. To this end, this paper studies a small-volume user anomaly power detection scheme based on Support Vector Machine (SVM), which can effectively identify the abnormal power consumption mode by tracking and screening the load data of the user for a period of time. An unbalanced sample synthesis processing model based on SMOTE+Bagging is constructed. The differential evolution algorithm is used to optimize the SVM parameters, which solves the problem that SVM classification performance is more affected by parameters. At the same time, the operational efficiency of the SVM-based Bagging integrated classification model is guaranteed. Keywords-Component; Lean Management, Management Line Loss, Support Vector Machine, SMOTE+Bagging, Unbalanced Sample
电力系统线损计算与精益管理系统的设计与应用,对指导减损节能、推进线损管理具有重要的指导意义。近年来,电能数据采集系统作为一种能够有效满足电力企业用电信息需求的工具,在满足供电营销自动化需求的同时,也积累了大量的用户用电数据。这些功耗数据包含了大量的用户电量使用信息。因此,可以对电力电能数据采集系统采集到的用户数据进行分析处理,识别出断电高嫌疑用户,从而降低管理线路损耗。为此,本文研究了一种基于支持向量机(SVM)的小容量用户异常用电量检测方案,该方案通过对用户一段时间内的负荷数据进行跟踪筛选,可以有效识别异常用电量模式。建立了基于SMOTE+Bagging的不平衡样品综合处理模型。采用差分进化算法对支持向量机参数进行优化,解决了支持向量机分类性能受参数影响较大的问题。同时,保证了基于支持向量机的Bagging综合分类模型的运行效率。Keywords-Component;精益管理,线损管理,支持向量机,SMOTE+装袋,不平衡样品
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引用次数: 0
Theoretical Study on Drilling Wood to Make Fire and Design of Auxiliary Device 钻木取火的理论研究及辅助装置设计
Liu Wenhui, Cao Wei, H. Javed, Han Zhao
Human beings have known the phenomenon of friction for a long time, among which "drilling wood to make fire" is one of the earliest methods to make use of friction. From the point of view of human history, human understanding, use and mastery of fire is the first practice for human beings to understand nature and make use of nature to improve production and life. Drilling wood to make fire is an important symbol of human beings from barbarians to civilization. In this paper, the selection, treatment and fire conditions of "drilling wood for fire" wood material are studied by using tribological theory, and a simple auxiliary device is built to verify the actual friction fire process. In this paper, drilling wood to make fire is raised to the height of scientific research, and drilling wood to make fire is closely related to tribology. After the experiment, the designed simple device can meet the requirements, and the open fire can be produced in the expected time. Keywords-Drill Wood to Make Fire; Friction to Make Fire; Fire Device
人类很早就知道摩擦现象,其中“钻木取火”是最早利用摩擦的方法之一。从人类历史的角度来看,人类对火的认识、利用和掌握是人类认识自然、利用自然改善生产生活的第一次实践。钻木生火是人类从野蛮走向文明的重要标志。本文运用摩擦学理论,对“钻木取火”木材材料的选择、处理及着火条件进行了研究,并搭建了简单的辅助装置,对实际的摩擦着火过程进行了验证。本文将钻木取火上升到科学研究的高度,而钻木取火与摩擦学有着密切的关系。经过实验,所设计的简易装置能够满足要求,并能在预期时间内产生明火。关键词:钻木生火;摩擦产生火;消防设备
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引用次数: 0
Compare PID and PDF Control in 2 Degree of Freedom Robotic Manipulator 二自由度机械臂PID控制与PDF控制的比较
Ming-hui Qiang, Bai Yu, Jia Feng, Edwards Gerard
This paper compare the differences between Proportional Integral Derivative (PID) and Pseudo Derivative Feedback (PDF) control algorithms in a two degree of freedom (DOF) planar robot manipulator. The PID and PDF control algorithms are compared in MATLAB which is a simple and practical tool for testing algorithms. An ODE45 function of MATLAB was used in order to solve differential equations. The solution of the differential equation contains the force acting on the actuator. Moreover, since the gain is unknown, a mathematical approach was introduced to carry out the gain. Simulation results showed that PDF control algorithm is shown to be superior to PID control algorithm by comparing the responses in MATLAB. Overshooting appeared in the PID algorithm disappears in the PDF algorithm. Keywords-PID; PDF; Control; Algorithms; MATLAB; Ode45
比较了比例积分微分(PID)和伪微分反馈(PDF)控制算法在二自由度平面机器人操纵臂中的区别。在MATLAB中对PID和PDF控制算法进行了比较,MATLAB是一种简单实用的算法测试工具。利用MATLAB中的ODE45函数求解微分方程。微分方程的解包含作用在执行器上的力。此外,由于增益是未知的,引入了一种数学方法来实现增益。仿真结果表明,通过对比MATLAB中的响应,PDF控制算法优于PID控制算法。PID算法中出现的过冲在PDF算法中消失。Keywords-PID;PDF格式;控制;算法;MATLAB;数值
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引用次数: 0
Aanalysis of Coupler for Wireless Power Transmission 无线电力传输耦合器分析
Sun Kaidong, Lai Yueshen, Lai Hao, Liu Changke
{"title":"Aanalysis of Coupler for Wireless Power Transmission","authors":"Sun Kaidong, Lai Yueshen, Lai Hao, Liu Changke","doi":"10.2991/pntim-19.2019.47","DOIUrl":"https://doi.org/10.2991/pntim-19.2019.47","url":null,"abstract":"","PeriodicalId":344913,"journal":{"name":"Proceedings of the 2019 International Conference on Precision Machining, Non-Traditional Machining and Intelligent Manufacturing (PNTIM 2019)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117057204","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
Research on Load Sharing Characteristics of Planetary Transmission System 行星传动系统负荷分担特性研究
Liu Zhiyu, Dong Hao, L. Bo
In order to study the average load sharing characteristics of planetary transmission, based on the lumped parameter theory, the dynamic model is established by considering the factors such as error, support clearance and support stiffness. The Runge-Kutta numerical method is used to solve the model, and the relationship between parameters and load sharing characteristics is obtained. The results show that with the increase of the support gap, the load factor tends to be flat after the rapid decline; with the change of manufacturing error, the load factor and the error approximate a linear relationship; with the increase of the support stiffness, the system load factor After a rapid increase, it tends to be gentle. Keywords-Planetary Transmission; Load Sharing; Clearance; Error
为了研究行星传动的平均载荷共享特性,基于集总参数理论,考虑误差、支承间隙和支承刚度等因素,建立了行星传动的动力学模型。采用龙格-库塔数值方法对模型进行求解,得到了参数与荷载分担特性之间的关系。结果表明:随着支撑间隙的增大,荷载系数在快速下降后趋于平缓;随着制造误差的变化,载荷系数与误差近似成线性关系;随着支承刚度的增大,系统载荷系数在快速增大后趋于平缓。Keywords-Planetary传输;负载共享;间隙;错误
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引用次数: 0
Study on Numerical Simulation of Electrochemical Machining Ring Narrow Groove 电解加工环形窄槽的数值模拟研究
Mu Ruiyuan, Cao Yan, Jia Feng, Lei Yan
For annular narrow slot structure of electrochemical machining process test cycle is long, type face the problem of difficult to predict, establish mask electrochemical machining process of the electric field, flow field and temperature field coupling mathematical model, using COMSOL Multiphysics to numerical simulation of multiple physical fields, get the machining gap in electrolyte, current density, velocity and pressure distribution. The results show that the multi-physical field coupling simulation technology can correctly budget the electrochemical machining process, provide a theoretical basis for the actual machining process parameters, and is of great significance to improve the quality and efficiency of electrochemical machining with narrow groove structure. Keywords-Annular Narrow Slot; Mask Electrolytic Machining; Multi-physical Field Coupling; Numerical Simulation
针对环形窄槽结构的电化学加工过程试验周期长、型面难以预测的问题,建立掩模式电化学加工过程中的电场、流场和温度场耦合数学模型,利用COMSOL Multiphysics对多个物理场进行数值模拟,得到加工间隙中电解液、电流密度、速度和压力的分布。结果表明,多物理场耦合仿真技术能够正确预算电解加工过程,为实际加工工艺参数提供理论依据,对提高窄槽结构电解加工的质量和效率具有重要意义。关键词:环形窄槽;掩模电解加工;多物理场耦合;数值模拟
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引用次数: 0
Development of On-Machine Measuring System for Pitch Deviation of Large Gears 大型齿轮节距偏差机上测量系统的研制
Guo Hongbin, He Dongfeng, Huang Feiyao, Yang Canhui
According to the processing principle of large-scale CNC gear hobbing machine, a high-precision on-machine measurement method for large gear pitch deviation using relative method and absolute method simultaneously is proposed. The mechanical body of high-precision on-machine measuring instrument with two-stage positioning system are designed to improve the positional accuracy of on-machine measurement. The system structure with upper and lower computers is proposed, which uses the high speed IO port of NC and Ethernet network for communication, so as to make full use of the function of NC system of gear hobbing machine. A large number of repeated experiments show that the range of 10 measurements of the pitch deviation and the cumulative deviation of the pitch in the developed machine are within 1/10 of the tolerance of the 3-grade precision worm specified in the national standard GB10089-88. Keywords-Component; on Machine Measurement; Pitch Deviation; Measuring Method; Side-by-side Construction
根据大型数控滚齿机的加工原理,提出了一种采用相对法和绝对法同时测量大齿轮节距偏差的高精度机上测量方法。为提高机内测量的定位精度,设计了高精度两级定位的机内测量仪的机械本体。提出了上、下位机的系统结构,利用数控高速IO口和以太网进行通信,充分发挥了滚齿机数控系统的功能。大量重复实验表明,所研制的机床螺距偏差的10次测量范围和累积偏差均在国家标准GB10089-88规定的3级精密蜗杆公差的1/10以内。Keywords-Component;对机测量;节距偏差;测量方法;一起建设
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引用次数: 0
期刊
Proceedings of the 2019 International Conference on Precision Machining, Non-Traditional Machining and Intelligent Manufacturing (PNTIM 2019)
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