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NEW PRECISION PIEZOELECTRIC STEP ACTUATOR

维普期刊数据库评论

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维普期刊数据库

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Chinese Journal of Mechanical Engineering 2006年第2期19卷 212-216页

作者： LIU Jianfang YANG Zhigang FAN Zunqiang cheng guangming College of Mechanical Engineering Jilin UniversityChangchun 130025 China

A new precision piezoelectric actuator is proposed to improve its drive capabilities. The actuator is based on the piezoelectric technology. It adopts the principle of bionics and works with a new method of stator initiative anchoring/loosen and a distortion structure of double-side thin flexible hinge. It solves the problem of anchoring/loosen, frequency, journey, resolution and velocity. The experiment shows that the new linear piezoelectric actuator works with high frequency （100 Hz）, high speed （502 μm/s）, large travel （〉10 mm）, high resolution （0.05 μm） and high load （100 N）. This kind of new piezoelectric actuator will be applied for large travel and high resolution driving device, optics engineering precision positioning and some micromanipulation field.

关键词： Piezoelectric step actuator Stator outside anchoring/loosen Precision Double-side thin flexible hinge Large travel

Spin-orbit hybrid entanglement quantum key distribution scheme

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Science China(Physics,Mechanics & Astronomy) 2014年第11期57卷 2043-2048页

作者： ZHANG chengXian GUO BangHong cheng guangming GUO JianJun FAN RongHua Laboratory of Nanophotonic Functional Materials and Devices School of Information and Optoelectronic Science and EngineeringSouth China Normal University

We propose a novel quantum key distribution scheme by using the SAM-OAM hybrid entangled state as the physical *** obtain this state,the polarization entangled photon pairs are created by the spontaneous parametric down conversion process,and then,the q-plate acts as a SAM-to-OAM transverter to transform the polarization entangled pairs into the hybrid entangled pattern,which opens the possibility to exploit the features of the higher-dimensional space of OAM state to encode *** the manipulation and encoding process,Alice performs the SAM measurement by modulating the polarization stateπ lθx on one photon,whereas Bob modulates the OAM sector state lx' on the other photon to encode his key elements using the designed holograms which is implemented by the computer-controlled *** coincidence measurement,Alice could extract the key *** is showed that N-based keys can be encoded with each pair of entangled photon,and this scheme is robust against Eve’s individual ***,the MUBs are not *** and Bob do not need the classical communication for the key recovery.

关键词： entanglement entangled modulating coincidence photon superposition encode manipulation spontaneous orbit

TRAVELING MACHINE DRIVEN BY PIEZOELECTRIC BIMORPH

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Chinese Journal of Mechanical Engineering 2007年第2期20卷 73-76页

作者： HUA Shunming cheng guangming FAN Zunqiang YANG Zhigang SUZUKI Katsiyoshi College of Mechanical Science and Engineering Jilin University Changchun 130025 China Faculty of Technology Yamagata UniversityYonezawa 992-0062 Japan

A rectangular bimorph will vibrate in bending mode under alternating current （AC） electric field. If two opposite tips along longitudinal direction are both clamped, the maximum magnitude of bending displacement occurs on the short center line. Using bimorpb type vibrators forementioned as actuators, an invention of simple traveling machine based on stick-slip principle is presented. The machine can not only move along both x and y direction within horizontal working plane, furthermore, excellent bearing ability and agile response as well as stable step are also proved. In addition, the machine can work on stepping mode and scanning mode at the same time, hence the contradiction between long stroke and high precise positioning is solved. Therefore, it meets the needs of micro/nanometer precise positioning under long stroke and is desired to be used as carrying stage for micro-assembling system and locomotive mechanism for miniature robot system.

关键词： Traveling machine Piezoelectric bimorpb Stick-slip principle

Fuzzy-PI and fuzzy feedforward compound control of variable pitch system 36

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Fuzzy-PI and fuzzy feedforward compound control of variable ...

DEVELOPMENT OF SINGLE-PHASED WATER-COOLING RADIATOR FOR COMPUTER CHIP

第36届中国控制会议

作者： Jinjie Huang Haiyang Jia guangming cheng Harbin University of Science and Technology

ISBN: (纸本)9781538629185

The traditional PID controller is difficult to reach good performances of a variable pitch control wind power system in a wide range of wind speed with changes momentarily and *** deal with this problem,a strategy of fuzzy-PI and fuzzy feedforward compound control for variable pitch systems is *** the wind speed is above its rated value,the fuzzy feedforward controller can produce a proper feedforward compensation value of pitch angle,together with the fuzzy-PI controller output,to regulate the output power of the generator stable near the power *** control scheme enables the system to obtain both good dynamic and good static *** results show that the proposed method can effectively suppress the disturbance of random wind,reduce the overshoot of system,and shorten the settling time of system.

关键词： rated-above wind speed variable pitch control fuzzy feed forward fuzzy-PI

来源： cnki会议评论

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Chinese Journal of Mechanical Engineering 2007年第2期20卷 77-81页

作者： ZENG Ping cheng guangming LIU Jiulong YANG Zhigang SUN Xiaofeng PENG Taijiang College of Mechanical Engineering and Automatization Jilin University Changchun 130022 China Department of Mechettonics Jilin InsUtute of Chemical Technolgy Jilin 132022 China

In order to cool computer chip efficiently with the least noise, a single phase water-cooling radiator for computer chip driven by piezoelectric pump with two parallel-connection chambers is developed. The structure and work principle of this radiator is described. Material, processing method and design principles of whole radiator are also explained. Finite element analysis （FEA） software, ANSYS, is used to simulate the heat distribution in the radiator. Testing equipments for water-cooling radiator are also listed. By experimental tests, influences of flowrate inside the cooling system and fan on chip cooling are explicated. This water-cooling radiator is proved more efficient than current air-cooling radiator with comparison experiments. During cooling the heater which simulates the working of computer chip with different power, the water-cooling radiator needs shorter time to reach lower steady temperatures than current air-cooling radiator.

关键词： Computer chip Water-cooling Piezoelectric pump Radiator ANSYS simulation Simulative heater

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非对称波驱动的非接触式超声电机

中国电机工程学报 2011年第9期31卷 94-99页

作者：鄂世举汤乐超程光明浙江师范大学工学院浙江省金华市321004 中国第一汽车集团公司吉林省长春市130022

通过对一种非接触式压电电机试验样机的构造进行分析及实验,验证非对称波驱动机理。在有限元分析的基础上对电机进行了阻抗测试,确定了该电机的有效工作频率;通过振幅测试验证了非对称波的存在,测量了频率及驱动电压与电机转速之间的关... 详细信息

通过对一种非接触式压电电机试验样机的构造进行分析及实验,验证非对称波驱动机理。在有限元分析的基础上对电机进行了阻抗测试,确定了该电机的有效工作频率;通过振幅测试验证了非对称波的存在,测量了频率及驱动电压与电机转速之间的关系,比较了电机两种调速方式的优缺点。实验数据为非对称波驱动的压电电机的应用研究奠定了基础。研究工作表明,非对称波具有驱动能力,据此构建的压电电机具有结构简单、驱动方便等特点。

关键词：非接触非对称波超声电机驱动机理实验

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尼龙纤维增强混凝土的强度性能研究

施工技术 2015年第24期44卷 48-51页

作者：程光明浙江大学建筑工程学院浙江杭州310058

研究表明在纤维增强混凝土中,当纤维含量均为0.6kg/m3时,将尼龙纤维增强混凝土与聚丙烯增强混凝土的强度特性进行对比可知:尼龙纤维增强混凝土的抗压强度、抗拉强度和抗折强度分别比聚丙烯增强混凝土提高6.23%,6.67%和4.28%。在抗冲击方... 详细信息

研究表明在纤维增强混凝土中,当纤维含量均为0.6kg/m3时,将尼龙纤维增强混凝土与聚丙烯增强混凝土的强度特性进行对比可知:尼龙纤维增强混凝土的抗压强度、抗拉强度和抗折强度分别比聚丙烯增强混凝土提高6.23%,6.67%和4.28%。在抗冲击方面,普通混凝土中加入相同量的纤维后,在提高混凝土初裂强度、破坏强度及初裂后的延缓冲击破坏能力方面,尼龙纤维的改善效果比聚丙烯纤维明显。此外,尼龙纤维增强混凝土的早期塑性收缩裂缝也比聚丙烯纤维混凝土少。尼龙纤维的上述优点来源于其具有较高的拉伸强度,也源于它在混凝土中分布较好。

关键词：混凝土尼龙纤维聚丙烯纤维收缩裂缝性能

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多用户无源光网络量子密钥分发系统研究

光通信技术 2018年第1期42卷 5-8页

作者：程广明中国电子产品可靠性与环境试验研究所赛宝认证中心广州510610

提出了量子安全保证的无源光网络(PON)概念,对比分析了独立传输和共纤传输量子无源光网络的特点。设计了基于改进的即插即用系统的多用户无源光网络量子密钥分发(PON-QKD)系统,并对该系统的性能和可行性进行了论证。

关键词：量子密钥分发无源光网络波分复用

基于平均等效应力强度因子的焊缝疲劳寿命预测

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锻压技术 2016年第10期41卷 132-137页

作者：宋凯程广鸣湖南大学汽车车身先进设计制造国家重点实验室湖南长沙410082 上汽通用五菱汽车股份有限公司广西壮族自治区柳州545000

目前普遍应用的焊缝疲劳仿真分析方法主要有名义应力法和结构应力法,针对两种方法的应用局限性及未考虑剪切结构应力导致的预测精度不高等问题,提出了一种新的高精度焊缝疲劳寿命预测方法。该方法是以断裂力学为理论基础,通过有限元软... 详细信息

目前普遍应用的焊缝疲劳仿真分析方法主要有名义应力法和结构应力法,针对两种方法的应用局限性及未考虑剪切结构应力导致的预测精度不高等问题,提出了一种新的高精度焊缝疲劳寿命预测方法。该方法是以断裂力学为理论基础,通过有限元软件提取焊缝周围节点的节点力及力矩,并通过一系列计算得到整个裂纹扩展路径上的平均等效应力强度因子ΔKeq,并将其作为本文中焊缝疲劳寿命预测方法的评价参数。通过对DP800GI和HSLA350GI两种高强钢材料的搭接接头进行疲劳试验,并将ΔKeq与试验所得的疲劳寿命数据进行双对数回归分析,得到的一条主ΔKeq-N曲线作为焊缝的疲劳寿命预测曲线,并与目前的名义应力法和结构应力法进行预测精度对比,得出本文中的焊缝疲劳寿命预测方法的预测精度高于目前的名义应力法和结构应力法。

关键词：焊缝疲劳寿命裂纹节点力力矩平均等效应力强度因子