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An innovative ultrasonic motor model for efficiency improvement 一种创新的超声电机模型，以提高效率
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167309
Bezawada Chakradhar, Potuganti Prudhvi, A. Sudarshan, Peri Raguveer
{"title":"An innovative ultrasonic motor model for efficiency improvement","authors":"Bezawada Chakradhar, Potuganti Prudhvi, A. Sudarshan, Peri Raguveer","doi":"10.1109/SPAWDA.2011.6167309","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167309","url":null,"abstract":"The ultrasonic motors have been wondering researchers for a long time. Due to their noiseless operation, greater power densities and gear free operation, they have been used in many applications in electronic equipment. This paper proposes a new design of pushrods which drastically improves efficiency over the existing ones. The structure of push rods has been optimized to obtain more torque and subsequently improving power output. The paper describes the proposed model and lists all required calculations. With this new model, ultrasonic motors can find applications in wider variety of fields.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"28 7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115707598","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
An equivalent wear method of friction material for ultrasonic motor 超声电机摩擦材料的等效磨损方法
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167258
Yan-li Wang, J. Qu, Jian-chun Li, Xiu Tian
{"title":"An equivalent wear method of friction material for ultrasonic motor","authors":"Yan-li Wang, J. Qu, Jian-chun Li, Xiu Tian","doi":"10.1109/SPAWDA.2011.6167258","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167258","url":null,"abstract":"As one of key materials for improving the performance of ultrasonic motor, the wear of friction material plays an important role in contact friction properties and output performance of ultrasonic motors. However, the wear loss of friction material is small in the friction system of ultrasonic motor. If effects of wear of friction material on properties of ultrasonic motor studied with a real motor, the experiment process were time-consuming and low efficiency and influenced by lots of known or unknown factors. In this paper, based on operation principle and wear characteristics of ultrasonic motor, an equivalent wear experimental method which using reduction of thickness of friction material equivalent to wear of friction material was proposed. And the relationships between wear of friction material and performance of ultrasonic motor were established. Validity of the method was carried out on one 60 traveling wave ultrasonic motor. This research could provide a new method for studying performance and life of ultrasonic motor.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"146 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115184199","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: 1
Influence of temperature on microstructure and electrical properties of znic doped CCTO ceramics 温度对掺杂锌CCTO陶瓷微观结构和电性能的影响
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167266
Dong-yu Xu, Yan Zhao, Song Bai, Yuanling Liu, H. Ding
{"title":"Influence of temperature on microstructure and electrical properties of znic doped CCTO ceramics","authors":"Dong-yu Xu, Yan Zhao, Song Bai, Yuanling Liu, H. Ding","doi":"10.1109/SPAWDA.2011.6167266","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167266","url":null,"abstract":"The influence of sintering temperature on microstructure and electrical properties of Zn doped CaCu<inf>3</inf>Ti<inf>4</inf>O<inf>12</inf> ceramics were investigated. The CaCu<inf>3−x</inf>Zn<inf>x</inf>Ti<inf>4</inf>O<inf>12</inf> (x=0, 0.06, 0.1, 0.2) ceramics were prepared by sol-gel method, and sintered at 950 □, 1000 □, 1050 □, 1100 □. XRD patterns confirm the formation of CCTO crystal phase in the as-prepared samples, and SEM results showed different porous structures and grain sizes at different temperatures. The results were commented and discussed on the temperature effect on electric properties and microstructure of CaCu<inf>3−x</inf>Zn<inf>x</inf>Ti<inf>4</inf>O<inf>12</inf> ceramics.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114814454","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
Sandwich structures with imperfect bonding under anti-plane deformations 反平面变形下不完全粘结的夹层结构
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167315
Yan Xue, Jinxi Liu
{"title":"Sandwich structures with imperfect bonding under anti-plane deformations","authors":"Yan Xue, Jinxi Liu","doi":"10.1109/SPAWDA.2011.6167315","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167315","url":null,"abstract":"The decay of Saint-Venant end effect for the anti-plane deformation of piezoelectric-elastic sandwich structure is studied theoretically. The end of the sandwich structure is subjected to a set of self-equilibrated electro-elastic loads. The upper and lower surfaces of the sandwich structure are assumed to be traction-free and subjected to two kinds of electric boundary conditions. These electric boundary conditions are electrically short and electrically open. The characteristic equations for decay rate are derived. The numerical examples are given to show that the electric boundary conditions, volume fraction and the degree of the imperfect bonding have significant influences on the decay rate.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"2014 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128156659","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: 1
Inversion method for bottom parameters estimation by reflection model of effective density fluid approximation 基于有效密度流体近似反射模型的底参数反演方法
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167197
Sheng-qi Yu, Yi-wang Huang, Yang Song, Jin-shan Fu
{"title":"Inversion method for bottom parameters estimation by reflection model of effective density fluid approximation","authors":"Sheng-qi Yu, Yi-wang Huang, Yang Song, Jin-shan Fu","doi":"10.1109/SPAWDA.2011.6167197","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167197","url":null,"abstract":"In order to obtain physical and geoacoustic properties of seafloor sediments, inversion method is presented with the reflection loss data at different grazing angles, which is derived from the reflection model based on effective density fluid approximation. In estimation of porosity, average grain size, mass density and bulk modulus of grains, genetic algorithm and particle swarm optimization are employed, respectively. Based on the above physical parameters, sound velocity and attenuation can be given. Numerical simulations show that both optimization algorithms have good performance in evaluating parameters with the exception of mean grain size and bulk modulus of grains. While the results inverted by particle swarm optimization are better than that of genetic algorithm in general.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121436042","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: 1
Vibration analysis of SC-cut quartz crystal plates with the Mindlin and Lee plate theories 用Mindlin和Lee板理论分析sc切割石英晶体板的振动
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167284
Ji Wang, Wen-jun Wang, Gui-jia Chen, Jianke Du, T. Ma, Dejin Huang
{"title":"Vibration analysis of SC-cut quartz crystal plates with the Mindlin and Lee plate theories","authors":"Ji Wang, Wen-jun Wang, Gui-jia Chen, Jianke Du, T. Ma, Dejin Huang","doi":"10.1109/SPAWDA.2011.6167284","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167284","url":null,"abstract":"SC-cut quartz crystal resonators have been widely utilized in many applications as core elements of filters and sensors for their higher vibration frequencies. An analysis of SC-cut quartz crystal resonators is required as part of the design process and it has been proven that the Mindlin and Lee plate equations can be used for the vibration analysis of plates at the higher-order overtone modes with accurate prediction of frequency and dispersion relations in the vicinity of cut-off frequencies. We have utilized the first-order Mindlin and Lee plate equations for the analysis of thickness-shear free vibrations of a rectangular SC-cut quartz crystal plate. The procedure has been established for the calculation of dispersion relations, frequency spectra, selected vibration modes, and determination of the optimal length of SC-cut quartz crystal blank. Such detailed studies on the successive overtone vibrations at the thickness-shear mode will provide important design guidelines for SC-cut quartz crystal resonators.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114656486","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: 1
Extended intensity factors of typical cracks in three-dimensoinal electromagnetoelastic materials 三维电磁弹性材料典型裂纹的扩展强度因子
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167321
T. Qin, Xiao-juan Li, Lin-nan Zhang, Peng Zhao
{"title":"Extended intensity factors of typical cracks in three-dimensoinal electromagnetoelastic materials","authors":"T. Qin, Xiao-juan Li, Lin-nan Zhang, Peng Zhao","doi":"10.1109/SPAWDA.2011.6167321","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167321","url":null,"abstract":"Using the Green's functions, the extended general displacement solutions are obtained for a planar crack in a three-dimensional electromagnetothermoelastic solid by boundary integral equation method. Then the crack problem is reduced to solving a set of hypersingular integral equations, in which the unknown functions are the extended displacement discontinuities of the crack surface. Based on the analytical behavior of the unknown functions near the crack front, a numerical method for some typical cracks subjected to extended loads is proposed, in which the extended displacement discontinuities are approximated by the products of basic density functions and polynomials. Finally, the distributions of the extended intensity factors varying with the shape of the crack are presented. The results show that the present method yields smooth variations of extended intensity factors along the crack front accurately.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131966748","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
Dielectric tunability of BaxSr1−xTiO3 thin films grown on a compliant substrate 在柔性衬底上生长的BaxSr1&#x2212;xTiO3薄膜的介电可调性
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167285
Hua-ping Wu, Bin Xu, Xiaoliang Lu
{"title":"Dielectric tunability of BaxSr1&#x2212;xTiO3 thin films grown on a compliant substrate","authors":"Hua-ping Wu, Bin Xu, Xiaoliang Lu","doi":"10.1109/SPAWDA.2011.6167285","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167285","url":null,"abstract":"The phase transition temperature and dielectric tunability of BaxSr1−xTiO3 (BST) thin films grown on a compliant substrate are theoretically investigated using the Ginzburg-Landau-Devonshire theory combined with the Timosheko elastic theory by considering thin films' and substrates' thickness-dependent relaxation of lattice-mismatch strain. Our results indicate that the dielectric characteristics of BST thin films deposited on compliant substrates are different from those of their bulk counterparts. The ferroelectricity and dielectric performances of the BST thin films can be modulated by changing the thickness ratio of the film to substrate or the stress state. This is an effectively theoretical guidance for the property optimization of ferroelectric thin films used in microwave devices.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132184581","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: 1
Finite element simulation of wireless structural vibration and shape control with photostrictive actuators 光致伸缩作动器无线结构振动与形状控制的有限元仿真
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167236
S. Zheng, Shu-yang Li, Jing-jing Lian
{"title":"Finite element simulation of wireless structural vibration and shape control with photostrictive actuators","authors":"S. Zheng, Shu-yang Li, Jing-jing Lian","doi":"10.1109/SPAWDA.2011.6167236","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167236","url":null,"abstract":"This paper focuses on the investigation of non-contact shape and vibration control of flexible structures via surface bonded photostrictive actuators. Firstly, a novel opto-electromechanical solid shell element is developed for accurate analysis of the multiphysics' effects with optical-electric-mechanical-thermal coupling. Secondly, based on the genetic algorithm and finite element analysis, a general method of non-contact shape control for beam by using PLZT photostrictive actuator is presented. Lastly, photostrictive films are numerically analyzed to evaluate their use as wireless actuators for future remote vibration control of structures. Now available experimental data and analytical solutions have been used to verify the present finite element results and the simulation in this study demonstrates that the use of photostrictive actuators can provide good controllability of structural vibration and shape.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"214 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131708593","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: 2
Vibration control simulation of beams with piezoelectric actuators using impedance and FEM 基于阻抗法和有限元法的压电作动器梁振动控制仿真
2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA) Pub Date : 2011-12-01 DOI: 10.1109/SPAWDA.2011.6167319
Chang Zheng, Xiao-ran Yin, Guo-qing Li, X. Miao
{"title":"Vibration control simulation of beams with piezoelectric actuators using impedance and FEM","authors":"Chang Zheng, Xiao-ran Yin, Guo-qing Li, X. Miao","doi":"10.1109/SPAWDA.2011.6167319","DOIUrl":"https://doi.org/10.1109/SPAWDA.2011.6167319","url":null,"abstract":"Vibration control simulations of beams with piezoelectric actuators using impedance method and FEM are presented in this paper. At first, one impedance matrix equation is used to describe the dynamic of one piezoelectric stretch actuator, and each impedance equation is equivalent to one mass-damping-spring (M-C-K) system. A FE harmonic analysis is carried out on piezoelectric stretch actuator and the equivalent system are determined by several frequency functions using FE results and numerical interpolations. Secondly, the equivalent system is used to build FE model of beams driven by piezoelectric bending actuators, which is consist of two piezoelectric stretch actuators located on the top and the bottom of the beam respectively. Once the frequency response data or transfer functions of the smart beam can be obtained by using impedance, the vibration control model with close-loop feedback can be established. At last, three numerical examples are used to verify the proposed methods. The results of one individual piezoelectric stretch vibrator show that, the predicted dynamic response is accord with the others. A simply-supported beam driven by piezoelectric bending actuators is considered as the second example. The center deflection of the beam is obtained and found to be quiet accurate comparing with the analytical result. The third example is to simulate vibration of one suspended piezoelectric bimorph beam under close-loop feedback control. The simulation result is also shown to be quite accurate by comparing with the other results, and the vibration absorption results are shown in the figures of this paper.","PeriodicalId":285701,"journal":{"name":"2011 Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)","volume":"134 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131727920","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: 2
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