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Analysis and control of micro-stepping characteristics of ultrasonic motor
Ning CHEN, Jieji ZHENG, Xianliang JIANG, Shixun FAN, Dapeng FAN
《机械工程前沿(英文)》 2020年 第15卷 第4期 页码 585-599 doi: 10.1007/s11465-019-0577-3
关键词: ultrasonic motor stepping characteristics pulse number control synchronous acquisition system precise positioning
Mujahid TABASSUM,Manas K. HALDAR,Duaa Fatima S. KHAN
《能源前沿(英文)》 2020年 第14卷 第1期 页码 192-211 doi: 10.1007/s11708-016-0438-2
关键词:
renewable energy
multiprotocol label switching (MPLS)
power grid
phasor measurement unit (PMU)
supervisory control and data acquisition systems (SCADA)
wide area monitoring system (WAMS)
worldwide interoperability for microwave access (WiMAX)
synchronous digital hierarchy
Ridha CHEIKH, Arezki MENACER, L. CHRIFI-ALAOUI, Said DRID
《能源前沿(英文)》 2020年 第14卷 第1期 页码 180-191 doi: 10.1007/s11708-018-0537-3
关键词: permanent magnet synchronous generator wind energy conversion system stochastic differential geometric feedback linearization maximum power point tracking Lyapunov robust control
Design and modeling of a free-piston engine generator
《能源前沿(英文)》 页码 811-821 doi: 10.1007/s11708-022-0848-2
关键词: free-piston engine generator linear permanent magnet synchronous machine system design numerical model finite element method
夏若飞,祝龙记,朱红,陆康
《中国工程科学》 2014年 第16卷 第8期 页码 79-82
为了使混合动力汽车的永磁同步电机获得快速的转速响应和稳定的静态特性,介绍了一种基于数字信号处理器(DSP)的矢量控制方案,将矢量控制方法引入电动汽车的电机控制中,改善了系统的动态性能和静态性能。系统仿真和实验结果表明,这种矢量控制系统动态和静态性能好,可以满足混合动力电动汽车对控制系统的要求,达到了预期的设计目标,使永磁同步电机获得了快速的转速响应和稳定的静态特性。
关键词: 电动汽车 矢量控制 数字信号处理器(DSP) 永磁同步电机
Louar FATEH,Ouari AHMED,Omeiri AMAR,Djellad ABDELHAK,Bouras LAKHDAR
《能源前沿(英文)》 2016年 第10卷 第2期 页码 155-163 doi: 10.1007/s11708-016-0410-1
关键词: wind turbine permanent magnet synchronous generator (PMSG) converter proportional-integral (PI) control direct control of the torque (DTC) regulation
李忠民,魏一鸣,汤淑春,陈健
《中国工程科学》 2006年 第8卷 第6期 页码 95-99
在对国外广泛采用的风险矩阵评估方法进行全面分析和系统总结的基础上,对风险矩阵方法在我国武器装备采办风险评估中的运用进行了探讨,并从风险影响和风险概率两个准则入手,以某武器型号采办为例示范性地进行了风险评估,从而为制定科学合理的武器装备采办风险管理提供决策依据。
多孔径光学成像系统及其光场采集数学模型 Review Article
祁启明,傅瑞罡,邵铮铮,王平,范红旗
《信息与电子工程前沿(英文)》 2022年 第23卷 第6期 页码 823-844 doi: 10.1631/FITEE.2100058
受昆虫复眼启发,为提高光学成像质量,如获得高分辨率图像或大视场图像,研究者提出了许多多孔径光学成像系统。光场采集数学模型是联系多孔径光学成像系统结构设计与应用的纽带,但光场采集数学模型较少被关注。本文系统梳理了典型多孔径光学成像系统(仿生复眼、光场相机、相机阵列),总结了不同结构下多孔径光学成像系统的一般性光场采集数学模型。列出的数学模型既可用于计算特定多孔径光学成像系统的关键指标,如视场大小和子图像重叠比等,也可作为数学工具,便于研究者完成对成像系统的定量设计与评估。
Development of real-time onion disease monitoring system using image acquisition
Du-Han KIM, Kyeong-Hwan LEE, Chang-Hyun CHOI, Tae-Hyun CHOI, Yong-Joo KIM
《农业科学与工程前沿(英文)》 2018年 第5卷 第4期 页码 469-474 doi: 10.15302/J-FASE-2018213
In this study, real-time disease monitoring was conducted on onion which is the most representative crop in Republic of Korea, using an image acquisition system newly developed for the mobile measurement of phenotype. The purpose of this study was to improve the accuracy of prediction of disease and state variables by processing images acquired from monitoring. The image acquisition system was consisted of two parts, a motorized driving system and a PTZ (pan, tilt and zoom) camera to take images of the plants. The acquired images were processed as follows. Noise was removed through an image filter and RGB (red, green and blue) colors were converted to HSV (hue, saturation and value), which enabled thresholding of areas with different colors and properties for image binarization by comparing the color of onion leaf with ambient areas. Four objects with the most significant browning in the onion leaf to the naked eye were selected as the samples for data acquired. The thresholding method with image processing was found to be superior to the naked eye in identifying accurate disease areas. In addition, it was found that the incidence of disease was different in each disease area ratio. As a result, the use of image acquisition system in image processing analysis will enable more prompt detection of any changes in the onion and monitoring of disease outbreaks during the crop lifecycle.
费德成,朱熀秋
《中国工程科学》 2005年 第7卷 第11期 页码 48-54
应用多变量非线性控制逆系统理论,对无轴承永磁同步电机的多变量、非线性、强耦合的控制对象进行了动态解耦控制研究;介绍了逆系统理论,阐述了无轴承永磁同步电机径向力的产生机理,建立了转矩力和径向悬浮力状态方程,分析了基于逆系统理论解耦控制的可行性,推导出基于逆系统理论的无轴承永磁同步电机转矩力与径向力之间的动态解耦控制算法。仿真结果表明,这种控制策略能够实现转矩力与径向力之间的动态解耦,并且系统具有良好的动、静态性能。
丁荣军,刘侃
《中国工程科学》 2019年 第21卷 第3期 页码 56-60 doi: 10.15302/J-SSCAE-2019.03.018
本文探讨了新能源汽车电机驱动系统的关键技术及发展趋势,包括驱动控制器中的功率半导体器件及封装、智能门极驱动、基于器件的系统集成设计,以及驱动电机中的扁铜线、多相永磁电机、永磁同步磁阻电机等关键技术。其中,着重介绍了当前车用电机驱动技术的发展趋势,并指出永磁同步电机在未来10 年内将依然是新能源汽车市场的主流驱动电机。同时,通过横向比较指出当前我国在驱动电机发展道路上所面临的关键问题,可以为我国未来新能源汽车技术发展提供一定参考。
Hao WANG, Fengge ZHANG, Tao GUAN, Siyang YU
《机械工程前沿(英文)》 2017年 第12卷 第3期 页码 420-426 doi: 10.1007/s11465-017-0439-9
A brushless electrically excited synchronous generator (BEESG) with a hybrid rotor is a novel electrically excited synchronous generator. The BEESG proposed in this paper is composed of a conventional stator with two different sets of windings with different pole numbers, and a hybrid rotor with powerful coupling capacity. The pole number of the rotor is different from those of the stator windings. Thus, an analysis method different from that applied to conventional generators should be applied to the BEESG. In view of this problem, the equivalent circuit and electromagnetic torque expression of the BEESG are derived on the basis of electromagnetic relation of the proposed generator. The generator is simulated and tested experimentally using the established equivalent circuit model. The experimental and simulation data are then analyzed and compared. Results show the validity of the equivalent circuit model.
关键词: wind power brushless electrically excited synchronous generator hybrid rotor equivalent circuit
朱熀秋,巫亮,周阳,张腾超,邓建明
《中国工程科学》 2006年 第8卷 第6期 页码 35-40
无轴承永磁同步电机是具有磁悬浮轴承优点的一种新型电机;在阐述了无轴承永磁同步电机工作原理基础上,采用转子磁场定向控制策略,推导了无轴承永磁同步电机径向悬浮力和电机旋转部分数学模型;根据无轴承电机解耦控制的要求设计了无轴承永磁同步电机转子磁场定向矢量控制系统,并以数字信号处理器TMS320LF2407为核心,研制了矢量控制系统的硬件和软件。实验结果表明:电机工作在0~3000r/min范围内,转子悬浮稳定且电机转速连续可调。
Quality control based on electrode displacement and force in resistance spot welding
Chuntao JI, Lipeng DENG
《机械工程前沿(英文)》 2010年 第5卷 第4期 页码 412-417 doi: 10.1007/s11465-010-0114-x
关键词: aluminum electrode displacement electrode force nugget size data acquisition
标题 作者 时间 类型 操作
Analysis and control of micro-stepping characteristics of ultrasonic motor
Ning CHEN, Jieji ZHENG, Xianliang JIANG, Shixun FAN, Dapeng FAN
期刊论文
Implementation and performance evaluation of advance metering infrastructure for Borneo-Wide Power Grid
Mujahid TABASSUM,Manas K. HALDAR,Duaa Fatima S. KHAN
期刊论文
Robust nonlinear control via feedback linearization and Lyapunov theory for permanent magnet synchronousgenerator-based wind energy conversion system
Ridha CHEIKH, Arezki MENACER, L. CHRIFI-ALAOUI, Said DRID
期刊论文
Modeling and control of a permanent magnet synchronous generator dedicated to standalone wind energyconversion system
Louar FATEH,Ouari AHMED,Omeiri AMAR,Djellad ABDELHAK,Bouras LAKHDAR
期刊论文
Development of real-time onion disease monitoring system using image acquisition
Du-Han KIM, Kyeong-Hwan LEE, Chang-Hyun CHOI, Tae-Hyun CHOI, Yong-Joo KIM
期刊论文
Equivalent circuit and characteristic simulation of a brushless electrically excited synchronous wind
Hao WANG, Fengge ZHANG, Tao GUAN, Siyang YU
期刊论文