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A Study of the Solid Freeform Fabrication (SFF) System with Dual Laser System 双激光固体自由曲面加工(SFF)系统研究
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-12-15 DOI: 10.1299/JSMEC.49.1215
Dong Soo Kim, Y. J. Ahn, W. Lee, S. Bae, K. Choi
{"title":"A Study of the Solid Freeform Fabrication (SFF) System with Dual Laser System","authors":"Dong Soo Kim, Y. J. Ahn, W. Lee, S. Bae, K. Choi","doi":"10.1299/JSMEC.49.1215","DOIUrl":"https://doi.org/10.1299/JSMEC.49.1215","url":null,"abstract":"A solid freeform fabrication (SFF) system using selective laser sintering (SLS) is currently recognized as a leading process and SLS extends the applications to machinery and automobiles due to the various materials employed. In order to develop a more elaborate and rapid system for fabricating large objects compared to existing SLS, this study employs a new selective dual-laser sintering (SDLS) process. It contains a 3-axis, dynamic focusing scanner system for scanning large areas instead of the existing fθ lens used in commercial SLS. Therefore, the unique scanning path generation is necessary to eliminate the factors of quality deterioration in case of fabricating larger objects. Also, this paper will address development of an SFF system which employs the dual laser system and the unique scanning device. Experiments were performed to evaluate the effect of a scanning path and fabrication parameters on sintering process and to fabricate the various 3D objects using polymer powder.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124009702","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: 5
Development of Prediction System for Environmental Burden for Machine Tool Operation 机床运行环境负荷预测系统的开发
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-12-15 DOI: 10.1299/JSMEC.49.1188
H. Narita, H. Kawamura, Takashi Norihisa, Lian-Yi Chen, H. Fujimoto, Takao Hasebe
{"title":"Development of Prediction System for Environmental Burden for Machine Tool Operation","authors":"H. Narita, H. Kawamura, Takashi Norihisa, Lian-Yi Chen, H. Fujimoto, Takao Hasebe","doi":"10.1299/JSMEC.49.1188","DOIUrl":"https://doi.org/10.1299/JSMEC.49.1188","url":null,"abstract":"Recently, some activities for environmental protection have been attempted to reduce environmental burdens in many fields. The manufacturing field also requires such reduction. Hence, a prediction system for environmental burden for machining operation is proposed based on the Life Cycle Assessment (LCA) policy for the future manufacturing system in this research. This system enables the calculation of environmental burden (equivalent CO2 emission) due to the electric consumption of machine tool components, cutting tool status, coolant quantity, lubricant oil quantity and metal chip quantity, and provides accurate information of environmental burden of the machining process by considering some activities related to machine tool operation. In this paper, the development of the prediction system is described. As a case study, two Numerical Control (NC) programs that manufacture a simple shape are evaluated to show the feasibility of the proposed system.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131868648","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: 78
Efficient Modeling Method of Vehicle Dynamics Operating at a Low Speed and Its Application to Non-Linear Optimal Controller Design 车辆低速运行动力学高效建模方法及其在非线性最优控制器设计中的应用
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-12-15 DOI: 10.1299/JSMEC.49.1040
Youngwoo Kim, Sinya Matsuzaki, T. Narikiyo
{"title":"Efficient Modeling Method of Vehicle Dynamics Operating at a Low Speed and Its Application to Non-Linear Optimal Controller Design","authors":"Youngwoo Kim, Sinya Matsuzaki, T. Narikiyo","doi":"10.1299/JSMEC.49.1040","DOIUrl":"https://doi.org/10.1299/JSMEC.49.1040","url":null,"abstract":"In this paper, we propose a non-analytical but effective self-organizing modeling method, where system dynamics of interest are constructed in a polynomial affine formation with high granularity. The conventional data mining technique has the assessment scheme for representativeness of the developed model. However, if the model is applied to extract the desired values without considering the structural peculiarities such as input pattern used for constructing the dynamics, hardware specification used for data acquisition, and so on, it possibly shows substantial margin of modeling error. In order to correspond this type of control paradigm, we define the permissible set of state and input variables in order to characterize the data used for developing the model. The developed model is then applied to the programming based optimal control scheme where the optimal inputs are selected among the permissible set of the input variable, considering all the limitations specified by linear inequalities.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"278 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115985287","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: 3
The Dynamic Characteristic of Printed Circuit Board with the Use of the Concept of Simplified Representative Volume Elements 用简化代表性体积元概念研究印刷电路板的动态特性
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-12-15 DOI: 10.1299/JSMEC.49.965
T. Oh, H. Seo, Y. Kwon, Yoon-Hyuk Kim
{"title":"The Dynamic Characteristic of Printed Circuit Board with the Use of the Concept of Simplified Representative Volume Elements","authors":"T. Oh, H. Seo, Y. Kwon, Yoon-Hyuk Kim","doi":"10.1299/JSMEC.49.965","DOIUrl":"https://doi.org/10.1299/JSMEC.49.965","url":null,"abstract":"PCB (Printed Circuit Board)s are designed in various sizes and shapes, use variety of processes and materials, and perform a variety of electrical, structural, and some times thermal functions. The major elements of PCBs are the fabric, the resin, and the metal foil (usually copper). The auxiliary elements are the adhesion promoters or treatments that are applied to the fabric and to the copper to assure maximum adhesion of the resin to the fabric and to the copper. Each copper layer has complicated and different pattern to correctly operate for its mission. In that case, the stiffness of PCBs are affected by the copper layers. By reasoning of this complicated copper layer pattern, it is difficult to determine the PCB stiffness. SAR (Solar Array Regulator) for Korea Leo Earth Observation & Science Satellites Program uses two PCBs of different types and sizes. These PCBs are composed of the resin system and copper layers, and not used the fabric. For this study, arm converter board applied to the SAR components is considered. In this study, the methodology of calculation of the PCB stiffness for SAR component is suggested considering the concept of simplified representative volume element and this property will be correlated with the vibration test results.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129805445","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
Life-Time Analysis of Modules for Reuse in Inverse Manufacturing 逆向制造中复用模块的寿命分析
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-12-15 DOI: 10.1299/JSMEC.49.1196
Yong Ji, H. Narita, Lian-Yi Chen, H. Fujimoto
{"title":"Life-Time Analysis of Modules for Reuse in Inverse Manufacturing","authors":"Yong Ji, H. Narita, Lian-Yi Chen, H. Fujimoto","doi":"10.1299/JSMEC.49.1196","DOIUrl":"https://doi.org/10.1299/JSMEC.49.1196","url":null,"abstract":"As environmental issues have become serious, the inverse manufacturing concept is discussed to establish a sustainable society. To realize the inverse manufacturing system the prime problem is how to improve the rate of reusing the product modules. Therefore analyzing the life-time of the disassembled modules is very important before reassembling process. In this paper, a cumulative damage model is proposed to discuss the quality of the product that is assembled by reuse modules. It is supposed that modules suffer damages due to shocks and fails when the cumulative damage level exceeds the failure level. Then maintenance cost will be analyzed in order to minimize the expected maintenance cost-rate by optimal maintenance time T and optimal number of damages N in this cumulative damage model. The probable safe life-time of module reuse will be explored. Finally numerical examples are given to confirm the validity of the proposed model.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129765354","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
Precision Fabrication of a Large-Area Sinusoidal Surface Using a Fast-Tool-Servo Technique : Improvement of Local Fabrication Accuracy 基于快速刀具伺服技术的大面积正弦曲面精密加工:局部加工精度的提高
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-12-15 DOI: 10.1299/JSMEC.49.1203
W. Gao, M. Tano, T. Araki, S. Kiyono
{"title":"Precision Fabrication of a Large-Area Sinusoidal Surface Using a Fast-Tool-Servo Technique : Improvement of Local Fabrication Accuracy","authors":"W. Gao, M. Tano, T. Araki, S. Kiyono","doi":"10.1299/JSMEC.49.1203","DOIUrl":"https://doi.org/10.1299/JSMEC.49.1203","url":null,"abstract":"This paper describes a diamond turning fabrication system for a sinusoidal grid surface. The wavelength and amplitude of the sinusoidal wave in each direction are 100µm and 100nm, respectively. The fabrication system, which is based on a fast-tool-servo (FTS), has the ability to generate the angle grid surface over an area of φ 150mm. This paper focuses on the improvement of the local fabrication accuracy. The areas considered are each approximately 1 × 1mm, and can be imaged by an interference microscope. Specific fabrication errors of the manufacturing process, caused by the round nose geometry of the diamond cutting tool and the data digitization, are successfully identified by Discrete Fourier Transform of the microscope images. Compensation processes are carried out to reduce the errors. As a result, the fabrication errors in local areas of the angle grid surface are reduced by 1/10.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"197 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122539958","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: 8
Attitude Control of a Rhönrad by Internal Mass Motion 内部质量运动对Rhönrad的姿态控制
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-12-15 DOI: 10.1299/JSMEC.49.1011
T. Mitarai, K. Ono, H. Yamaura
{"title":"Attitude Control of a Rhönrad by Internal Mass Motion","authors":"T. Mitarai, K. Ono, H. Yamaura","doi":"10.1299/JSMEC.49.1011","DOIUrl":"https://doi.org/10.1299/JSMEC.49.1011","url":null,"abstract":"Rhonrad is a gymnastic equipment that is interesting in terms of dynamics and control. The control method of the Spiral motion by the mass motion in the Rhonrad was clarified. First, the condition for a steady Spiral motion with arbitrary mass position was obtained. Then, by using the linearized equation of motion, the control method to control the attitude of the Rhonrad by the mass motion in it was derived. This control method allows the state of the Rhonrad to be changed from one steady Spiral motion to another steady motion.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124426701","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
Shape Control of Cable-Network Structures Based on Concept of Self-Equilibrated Stresses 基于自平衡应力概念的索网结构形状控制
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-12-15 DOI: 10.1299/JSMEC.49.1067
Hiroaki Tanaka, M. Natori
{"title":"Shape Control of Cable-Network Structures Based on Concept of Self-Equilibrated Stresses","authors":"Hiroaki Tanaka, M. Natori","doi":"10.1299/JSMEC.49.1067","DOIUrl":"https://doi.org/10.1299/JSMEC.49.1067","url":null,"abstract":"The shape control methods of cable-network structures are investigated. A cablenetwork structure is a structure that consists of networks of many cables. Novel control methods based on the concept of self-equilibrated stresses are proposed. The self-equilibrated stresses of cable-network structures with nominal or objective shape are calculated by the force density method. Control inputs are determined from these self-equilibrated stresses. This method is applied to reconfigurable antennas consisting of cable networks. The shape control of the antennas is carried out by the proposed or conventional method. The efficiencies of these control methods are compared by numerical simulation. An adequate shape control is achieved without the iteration step by the proposed method. The shape control results obtained by the proposed method are better than those obtained by the conventional method. It is clarified from the comparison that shape control using the proposed method is efficient.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134053558","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: 29
System Identification and 6-DOF Hovering Controller Design of Unmanned Model Helicopter 无人模型直升机系统辨识及六自由度悬停控制器设计
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-12-15 DOI: 10.1299/JSMEC.49.1048
Byeongil Kim, Y. Chang, M. Lee
{"title":"System Identification and 6-DOF Hovering Controller Design of Unmanned Model Helicopter","authors":"Byeongil Kim, Y. Chang, M. Lee","doi":"10.1299/JSMEC.49.1048","DOIUrl":"https://doi.org/10.1299/JSMEC.49.1048","url":null,"abstract":"For a maneuvering unmanned autonomous helicopter, it is necessary to design a proper controller for each flight mode. In this paper, the overall helicopter dynamics is derived and a hovering model is linearized and transformed into a state-space form. However, since it is difficult to obtain parameters for stability derivatives in the state-space directly, a linear control model is derived by a time-domain parametric system identification method with real flight data of a model helicopter. Then, two different controllers (a linear feedback controller with the proportional gain and a robust controller) are designed and their performances are compared. The simulation results show outstanding performance. The validated controllers can be utilized to enable autonomous flight of a RUAV (Rotorcraft-based Unmanned Aerial Vehicle).","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114777181","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: 36
Analysis of the Dynamic Behavior of the Inner Hair Cell Stereocilia by the Finite Element Method 内毛细胞立体纤毛动力学行为的有限元分析
Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-09-15 DOI: 10.1299/JSMEC.49.828
T. Matsui, C. Nakajima, Yui Yamamoto, M. Andoh, Koji Iida, M. Murakoshi, S. Kumano, H. Wada
{"title":"Analysis of the Dynamic Behavior of the Inner Hair Cell Stereocilia by the Finite Element Method","authors":"T. Matsui, C. Nakajima, Yui Yamamoto, M. Andoh, Koji Iida, M. Murakoshi, S. Kumano, H. Wada","doi":"10.1299/JSMEC.49.828","DOIUrl":"https://doi.org/10.1299/JSMEC.49.828","url":null,"abstract":"The motion of the inner hair cell (IHC) stereocilia, which results in tension in the tip links connected to mechanically gated ion channels, mediates the auditory transduction process. However, it is difficult to directly observe the motion of the stereocilia because of their minute dimensions and complex structure. In this study, to investigate such motion, a finite element method model of the tall, middle and short IHC stereocilia, including the tip and lateral links extending between the stereocilia, was constructed. By applying an analytically estimated fluid force caused by a stimulus of 60dB SPL at 500Hz to the model, the dynamic behavior of the stereocilia was analyzed. Numerical results showed that the stereocilia moved in phase and that the maximum tensions of 2.5fN and 2.1fN occurred in the tip link connecting the tall and middle stereocilia and in the tip link connecting the middle and short stereocilia, respectively. By contrast, under the condition in which the lateral links were removed, maximum tension in the former increased to 11.6fN, while that in the latter only increased to 2.3fN. It was therefore suggested that the lateral links protect the MET channels located at taller stereocilia against large stimuli and subject the channels located in the same IHC to forces of similar size.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"5 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":"124900649","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: 6
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