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Acoustic Beam Scanning Using Annular Transducer Array Introducing Decentering Operation 引入偏心操作的环形换能器阵列声波束扫描
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-09-15 DOI: 10.1299/JSMEC.49.681
H. Masuyama, K. Mizutani
{"title":"Acoustic Beam Scanning Using Annular Transducer Array Introducing Decentering Operation","authors":"H. Masuyama, K. Mizutani","doi":"10.1299/JSMEC.49.681","DOIUrl":"https://doi.org/10.1299/JSMEC.49.681","url":null,"abstract":"A method for scanning a radiated acoustic beam is described, by introducing a concise decentering operation in an annular transducer array sound source. For generating a narrow acoustic beam, we have proposed the simple method of using a concentric annular array in which the width of each element is weighed by the J0 function. Additionally, by applying a clearance that exists between each neighboring element of the array to decenter the array elements, we have shown that the direction of the radiated acoustic beam is made to be variable. Even when this decentering procedure is optimally, the shifting of the propagation path of the beam still occurs, and it is possible to scan the beam precisely. Using numerical calculations, we show the scanned aspect of the narrow beam generated by this method. The validity and applicability of this method are then examined.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129527594","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: 4
Chatter Prediction in End Milling by FNN Model with Pruning 用带剪枝的FNN模型预测立铣削颤振
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-09-15 DOI: 10.1299/JSMEC.49.742
J. Hino, Seiichi Okubo, T. Yoshimura
{"title":"Chatter Prediction in End Milling by FNN Model with Pruning","authors":"J. Hino, Seiichi Okubo, T. Yoshimura","doi":"10.1299/JSMEC.49.742","DOIUrl":"https://doi.org/10.1299/JSMEC.49.742","url":null,"abstract":"This paper is concerned with a study of chatter prediction in high-speed end milling operations. Chatter vibration occurring in mechanical machining gives rise to poor surface finish and dimensional inaccuracy in machined parts, reduction of tool life, and even damages machine tools. Various studies of its prediction and avoidance have been carried out over the last several decades. The purpose of this study is to develop an expert system for predicting chatter vibrations in high-speed end milling using wavelet transform and fuzzy neural network models with pruning. The FNN model employed here uses a pruning process which reduces a neural network to its most effective size. The amount of learning for convergence of a pruned network is reduced in comparison with an initial network. The proposed method is applied to a jig grinding machine, and the results demonstrate the effectiveness of the chatter prediction procedure.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134417936","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: 9
Development of Active Rocking Chair with Changing Swing According to Heartbeat Fluctuation 根据心跳波动变化摆动的主动摇椅的研制
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-09-15 DOI: 10.1299/JSMEC.49.814
T. Kawashima
{"title":"Development of Active Rocking Chair with Changing Swing According to Heartbeat Fluctuation","authors":"T. Kawashima","doi":"10.1299/JSMEC.49.814","DOIUrl":"https://doi.org/10.1299/JSMEC.49.814","url":null,"abstract":"The purpose of this study is to realize a comfortable swing according to the condition of each individual person. A simple active rocking chair is developed, the swing of which changes with the heartbeat fluctuation of the seated person. The active rocking chair is driven by a solenoid for safety and silence. Swinging is strengthened when the period of the heartbeat lengthens, and it is weakened when the period shortens. Swinging is evaluated using a questionnaire of 16 bipolar scales that was developed for the evaluation of comfortable swinging on the basis of the semantic differential (SD) technique. As a result, it is confirmed that comfortable swinging is realized by the developed active rocking chair. Then the acceleration near the ear of the seated person is measured in order to examine the features of comfortable swinging using the feedback of heartbeat fluctuation. It is clarified that the power spectrum of the envelope of the acceleration waveform shows “1/f fluctuation”.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128631879","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: 9
Newly-developed adaptive noise absorption control technology for high speed fan noise reduction. 新开发的高速风机降噪自适应吸声控制技术。
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-09-15 DOI: 10.1299/JSMEC.49.703
Hiroshi Kobayashi, Masaharu Koh, Shunichi Ozaki, M. Yokochi, Sato Takuo
{"title":"Newly-developed adaptive noise absorption control technology for high speed fan noise reduction.","authors":"Hiroshi Kobayashi, Masaharu Koh, Shunichi Ozaki, M. Yokochi, Sato Takuo","doi":"10.1299/JSMEC.49.703","DOIUrl":"https://doi.org/10.1299/JSMEC.49.703","url":null,"abstract":"The paper describes about a newly-developed adaptive noise absorption control (AAC) technology I for fan noise reduction and about proof test results of the technology. The AAC technology adaptively controls the reactance part of acoustic impedance of duct liners with mobile reflective plates and large acoustic chambers, absorbs fan tones and broadband noise together, and achieves larger overall fan noise reduction over a wide fan speed range. For actual proof of the technology, adaptive duct liner I was made on trial basis and was examined. The test result clarifies that the duct liner I could reduce fan noise larger than O.A. SPL 10dB (A) at max fan speed of 6000rpm, including reduction of low frequency noise and fundamental BPF tone and harmonics of 18dB at maximum. In response to fan speed change, the reflective plate movement control could achieve the large peak frequency shift and peak level increase in the acoustic absorption spectra, and could reduce fan noise larger than O.A. SPL 9dB (A) over the fan speed range from 1000 to 6000rpm.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"125 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126808831","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: 9
Structural Modification with Mode Shape Expansion for Rib Stiffeners 肋加强筋模态振型扩展的结构修正
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-09-15 DOI: 10.1299/JSMEC.49.771
F. Kuratani, T. Shimada, T. Yamano, T. Ogawa
{"title":"Structural Modification with Mode Shape Expansion for Rib Stiffeners","authors":"F. Kuratani, T. Shimada, T. Yamano, T. Ogawa","doi":"10.1299/JSMEC.49.771","DOIUrl":"https://doi.org/10.1299/JSMEC.49.771","url":null,"abstract":"In this paper, we propose a procedure for predicting the modal data of a thin plate structure with a rib stiffener even when the rib is attached at a location where mode shapes are not measured. This procedure is based on the structural dynamics modification (SDM) method in which the mode shape expansion (MSE) method is incorporated to estimate the experimental mode shapes at the unmeasured points. In the MSE estimation, a submodel including the possible rib attachment points is used instead of the whole structure model. Numerical examples through the plate structure with the two L-shaped ribs show that the proposed procedure accurately predicts the modal data using the estimated mode shapes at the unmeasured points. The mode shapes are estimated satisfactorily with the submodel under a free boundary condition. The optimal number of analytical modes to be combined in the MSE estimation can be determined from the condition number of the modal matrix of the submodel.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123112889","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
Control of a Macro-Micro Robot System Using Manipulability of the Micro Robot 基于微机器人可操纵性的宏微机器人系统控制
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-09-15 DOI: 10.1299/JSMEC.49.897
Bui Trong Quan, Jian Huang, M. Harada, T. Yabuta
{"title":"Control of a Macro-Micro Robot System Using Manipulability of the Micro Robot","authors":"Bui Trong Quan, Jian Huang, M. Harada, T. Yabuta","doi":"10.1299/JSMEC.49.897","DOIUrl":"https://doi.org/10.1299/JSMEC.49.897","url":null,"abstract":"A 3’DOF robot finger is fixed to the end-effector of a 6’DOF robot arm to construct a redundant macro-micro robot system that is able to emulate the finger-arm system of a human being. However, determining joint angles and velocities of a redundant robot system in a natural way remains a difficult issue. This paper describes a method to control the system so as to generate common motions emulating the hand-arm movement of a human. To achieve this purpose, the finger is primarily supposed to complete delicate local motions while the arm moves to assist the finger when the manipulability of the finger is too low and the system is about to miss the desired target. The effectiveness on motion generation and the relation between kinetic energy and manipulability by using the proposed method has been experimentally demonstrated and discussed.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132850802","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: 15
Reduction of Vibratory Stress of Compressor Vane by Use of Friction Damper 利用摩擦阻尼器减小压气机叶片振动应力
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-09-15 DOI: 10.1299/JSMEC.49.642
Y. Kaneko, K. Mori, Masayuki Tomii
{"title":"Reduction of Vibratory Stress of Compressor Vane by Use of Friction Damper","authors":"Y. Kaneko, K. Mori, Masayuki Tomii","doi":"10.1299/JSMEC.49.642","DOIUrl":"https://doi.org/10.1299/JSMEC.49.642","url":null,"abstract":"The objective of this study is to verify the reduction effect of the friction damper on the vibratory stress of the compressor vane both theoretically and experimentally. First, an analysis method for predicting the damping characteristics of the compressor vane with a friction damper, which applies the substructure synthesis method and the harmonic balance method, is proposed. Secondly, an excitation test of the damper vane is carried out to verify the validity of the analysis method proposed here, and to confirm the damping characteristics of the damper vane. In the excitation test, a newly developed magnetic exciter, which applies the feature of the resonant circuit, is used to vibrate the vane with large excitation force. Vibration characteristics of the damper vane predicted by the analysis show good agreement with the measured results. Finally, to verify the effect of the friction damper, the field test of the actual gas turbine is carried out, where the vibratory stress of the compressor vane with and without the friction damper is measured.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126048402","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
Dynamic Characteristics Measurements of a Car Wiper Blade 汽车雨刷片的动态特性测量
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-09-15 DOI: 10.1299/JSMEC.49.799
Y. Fujii, Takao Yamaguchi
{"title":"Dynamic Characteristics Measurements of a Car Wiper Blade","authors":"Y. Fujii, Takao Yamaguchi","doi":"10.1299/JSMEC.49.799","DOIUrl":"https://doi.org/10.1299/JSMEC.49.799","url":null,"abstract":"Dynamic characteristics of a rubber car wiper blade, that are the viscoelasticity under impact load and the dynamical friction, have been accurately evaluated by means of an optical method. In the method, force is generated and measured as the inertial force acing on a mass. A linear air bearing is used to realize a linear motion with sufficiently small friction acting on the mass, i.e. the moving part of the linear bearing. The inertial force acting on the mass is calculated from the velocity of the mass. The velocity is determined highly accurately by means of measuring the Doppler shift of the frequency of the laser light beam reflecting on the mass using an optical interferometer. The viscoelasticity of the wiper blade under impact load is determined by means of colliding the mass with it. The kinetic friction acting between the wiper blade and glass plate is determined by means of pressing the wiper blade onto the glass plate attached on the upper surface of the mass, whose initial momentum is given manually. Using the developed instrumentation, both the viscoelasticity under impact load and the dynamical friction of the wiper blade are easily and accurately determined based on the definition of force.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129786036","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: 10
Vibratory Tactile Sensor Integrated a Longitudinal Resonator and a Force Sensor 振动触觉传感器集成了纵向谐振器和力传感器
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-09-15 DOI: 10.1299/JSMEC.49.675
S. Kudo
{"title":"Vibratory Tactile Sensor Integrated a Longitudinal Resonator and a Force Sensor","authors":"S. Kudo","doi":"10.1299/JSMEC.49.675","DOIUrl":"https://doi.org/10.1299/JSMEC.49.675","url":null,"abstract":"Tactile sensors have been used for sensing the softness and the hardness of an object. They make use of changes in the resonance frequency and the Q-value of resonators, which are induced when their vibrating sections are brought into contact with an object. This study proposes a new vibratory tactile sensor integrated a longitudinal bar type resonator and a force sensor. The resonance frequencies and these vibration modes of the tactile sensor are calculated using the finite element method. The sensitivity of the force sensor with a double-ended tuning fork resonator is analyzed and designed. The sensitivity of this force sensor is clarified experimentally. Then, the characteristics of the tactile sensor are confirmed using test pieces with different hardnesses. This longitudinal bar resonator integrated with a double-ended tuning fork resonator as a force sensor has potential as a high performance tactile sensor.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128699348","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
Accuracy Estimation of Shape Measurement of Thin-Large Panel with Three-Point-Support Inverting Method 薄型大型板形测量的三点支撑反演精度估计
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-09-15 DOI: 10.1299/JSMEC.49.930
Yukihiro Ito, W. Natsu, M. Kunieda, Noriyuki Maruya, Nobuaki Iguchi
{"title":"Accuracy Estimation of Shape Measurement of Thin-Large Panel with Three-Point-Support Inverting Method","authors":"Yukihiro Ito, W. Natsu, M. Kunieda, Noriyuki Maruya, Nobuaki Iguchi","doi":"10.1299/JSMEC.49.930","DOIUrl":"https://doi.org/10.1299/JSMEC.49.930","url":null,"abstract":"This paper describes the error analysis and the repeatability of the shape measurement of thin-large panel by the three-point-support inverting method. In this measuring method, the stable measurement can be carried out because the measured object is supported horizontally by three points. Moreover, the true shape of the measured object can be obtained by cancelling the effects of gravity. However, accurate measurement of the shape of thin-large panel is difficult because there are many error factors originated from both the measuring system and measured object. It was found that the combined standard uncertainty due to the errors caused by the measuring system was 0.408µm and the motion accuracy of the measuring system was the dominant factor. Repeatability of the warp measurement was 0.254µm. Effects of the vibrations of the measuring system and the silicon wafer and the distortion of the silicon wafer due to the friction between the wafer and supports on the repeatability were equivalent. The influence of the data sampling interval was not insignificant when the warp was large.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115802660","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: 9
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