Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing最新文献_第10页

Servomechanism Fault Detection Based on Load Torque Observer and Discrete Wavelet Transform 基于负载转矩观测器和离散小波变换的伺服机构故障检测

Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-06-15 DOI: 10.1299/JSMEC.49.418

Chung-Wei Cheng, W. Tseng, M. Tsai

引用次数: 3

Application of Nonstationary Sliding Mode Control to Suppression of Transverse Vibration of Elevator Rope Using Input Device with Gaps 非平稳滑模控制在带间隙输入装置抑制电梯绳索横向振动中的应用

Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-06-15 DOI: 10.1299/JSMEC.49.385

M. Otsuki, Y. Ushijima, K. Yoshida, H. Kimura, T. Nakagawa

{"title":"Application of Nonstationary Sliding Mode Control to Suppression of Transverse Vibration of Elevator Rope Using Input Device with Gaps","authors":"M. Otsuki, Y. Ushijima, K. Yoshida, H. Kimura, T. Nakagawa","doi":"10.1299/JSMEC.49.385","DOIUrl":"https://doi.org/10.1299/JSMEC.49.385","url":null,"abstract":"Transverse vibrations of ropes spanning a high-speed elevator are induced by resonance when a building sways because of an earthquake or wind force. Hence, an effective solution is demanded. In this study, we undertake to suppress the vibration of an elevator rope by using an input device placed in the vicinity of the upper boundary of the rope. This input device has gaps between an actuator and the rope to prevent the progression of their abrasion. A nonstationary control method is effective for the control of a time-varying system with which an elevator rope and a crane wire are categorized. In addition, a sliding mode controller is robust toward nonlinearity at the position where input is introduced. Thus, in this paper, we present a method of vibration control for the elevator rope, which is based on the nonstationary sliding mode control method using the input device with gaps. The effectiveness and robustness of the proposed controller are examined by numerical calculation that simulates input saturation, stroke limitation, gap-width expansion, and varying parameters, in the presence of model errors of the elevator rope. The results indicate effective vibration suppression and high robustness in the above cases except for the case of varying parameters.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117114911","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: 14

A Q-Learning for Group-Based Plan of Container Transfer Scheduling 基于群的集装箱转移调度计划的q学习

Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-06-15 DOI: 10.1299/JSMEC.49.473

Y. Hirashima, K. Takeda, Shigeaki Harada, M. Deng, A. Inoue

引用次数: 32

Influence of Lamination Pressure upon the Stiffness of Laminated Rotor 层压压力对层压转子刚度的影响

Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-06-15 DOI: 10.1299/JSMEC.49.426

Yeong-Chun Kim, Kyung-Woong Kim

{"title":"Influence of Lamination Pressure upon the Stiffness of Laminated Rotor","authors":"Yeong-Chun Kim, Kyung-Woong Kim","doi":"10.1299/JSMEC.49.426","DOIUrl":"https://doi.org/10.1299/JSMEC.49.426","url":null,"abstract":"In recent years, a laminated rotor made of the insulated silicon steel laminates is increas-ingly adopted in the electrical machineries. While this laminated rotor o ﬀ ers good electrical performances, it is quite complicated to predict its sti ﬀ ness as it is inﬂuenced by various fac-tors such as material properties and shape of the laminates, characteristics of the insulation layer, lamination pressure and method of ﬁtting. As it is di ﬃ cult to model or deﬁne boundary conditions in the case of lamination pressure or ﬁtting, the sti ﬀ ness of the laminated rotor cannot simply calculated using conventional analytical method. Therefore, quantitative investigation on the inﬂuence of lamination pressure upon the sti ﬀ ness of laminated rotor is highly required. In this study, natural frequency of the rotor is measured under various conditions of lamination pressure to investigate the inﬂuence of lamination pressure upon the sti ﬀ ness of laminated rotor. It is found from the experiment that the natural frequency is increased with lamination pressure, and saturated near the 20% of the di ﬀ erence between the inner and outer diameters of the laminate. It is also found that the natural frequency can be controlled to 4–14% in the range of 1–10 MPa of lamination pressure. The saturated value of the sti ﬀ ness of laminated rotor is expected to approach to that of shrinkage-ﬁtted cylinder having the same inner and outer diameters under the same assembly condition. It is expected that the results would be helpful to design generators or motors using laminated rotors.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122807601","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: 16

Influences of Taper Geometry Modified Oil-Grooves on Load Carrying Capacity of Crosshead Bearings 锥度几何形状修正油槽对十字头轴承承载能力的影响

Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-06-15 DOI: 10.1299/JSMEC.49.618

T. Kitahara, M. Otsubo, D. Nakahara

{"title":"Influences of Taper Geometry Modified Oil-Grooves on Load Carrying Capacity of Crosshead Bearings","authors":"T. Kitahara, M. Otsubo, D. Nakahara","doi":"10.1299/JSMEC.49.618","DOIUrl":"https://doi.org/10.1299/JSMEC.49.618","url":null,"abstract":"The crosshead bearing in large two-stroke diesel engines operates under severe lubrication conditions, because the bearing oscillates within a small angle at a low speed and is always subject to a high downward load. The recent trend towards more compact engines with increased output raises the bearing specific load, thereby causing the lubrication severity to increase significantly. Thus it is very important to improve the load carrying capacity of the crosshead bearing. In the present study, experiments using a dynamically loaded bearing seizure test apparatus were carried out to clarify the influences of the clearance ratio and the oil-groove geometry on the load carrying capacity. The electrical resistance of the oil film was also measured to evaluate the extent of the oil film formation. The major results are: (1) A decrease in the clearance ratio is effective in enhancing squeeze action on the entirety of the bearing pads, thereby improving the load carrying capacity. When the clearance ratio becomes too low, however, the ability to form an adequate wedge film is degraded, causing the load carrying capacity to decrease; (2) A significant improvement in the load carrying capacity can be expected, because incorporating the taper geometry on both sides of the oil-groove promotes a thicker oil film; and (3) A taper geometry with a subtended length of 5 degrees and a taper angle of 0.1 degree produces the maximum load carrying capacity.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"2005 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127632391","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

Continuous Visualization of Morphological Changes in Endothelial Cells in Response to Cyclic Stretch 内皮细胞响应循环拉伸时形态学变化的连续可视化

Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-06-15 DOI: 10.1299/JSMEC.49.545

Shunsuke Iwayoshi, K. Furukawa, T. Ushida

{"title":"Continuous Visualization of Morphological Changes in Endothelial Cells in Response to Cyclic Stretch","authors":"Shunsuke Iwayoshi, K. Furukawa, T. Ushida","doi":"10.1299/JSMEC.49.545","DOIUrl":"https://doi.org/10.1299/JSMEC.49.545","url":null,"abstract":"Endothelial cells are known to change their shapes in alignment with the direction perpendicular to that of cyclic stretch. However, the mechanisms are still not clear. In this study, we developed a new cell-stretching device which allows continuous observation of cyclically stretched/relaxed cells. Using this apparatus, morphological changes of single cells in response to cyclic stretch (1Hz, 10%, 2 hours) were visualized and analyzed. The data showed that there were two major patterns of morphological changes of ECs, depending on their initial shapes. While ECs with round shapes at the initial state changed their shapes to become more elongated in a direction perpendicular to that of stretch, cells oriented and elongated in the stretch direction at the initial state changed their shapes to first become rounder and then elongated to align perpendicular to the stretch direction at the second step. These results suggest that cell retraction as well as elongation is important in the stretch-induced endothelial morphological changes, and that the elucidation of the mechanisms of the morphological changes requires studies of cell retraction, elongation, and their coordination at the single-cell level.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"4 27","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132580058","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

Design of Adaptive Output Feedback Variable Structure Tracking Controllers 自适应输出反馈变结构跟踪控制器的设计

Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-06-15 DOI: 10.1299/JSMEC.49.432

Chih‐Chiang Cheng, Chih-Chin Wen, Shih-Pin Chen

引用次数: 7

Finite Element Vibration Analysis of Cylindrical Shells Conveying Fluid with Considering Acoustic-Structure Interactions 考虑声-结构相互作用的圆柱壳输送流体的有限元振动分析

Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-06-15 DOI: 10.1299/JSMEC.49.488

W. Jeong, Y. Seo, Se-Jin Ahn, W. Yoo

引用次数: 5

Fundamental Research on Hobbing with Minimal Quantity Lubrication of Cutting Oil 切削油少量润滑滚刀加工的基础研究

Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-06-15 DOI: 10.1299/JSMEC.49.1140

H. Matsuoka, Y. Tsuda, S. Suda, H. Yokota

{"title":"Fundamental Research on Hobbing with Minimal Quantity Lubrication of Cutting Oil","authors":"H. Matsuoka, Y. Tsuda, S. Suda, H. Yokota","doi":"10.1299/JSMEC.49.1140","DOIUrl":"https://doi.org/10.1299/JSMEC.49.1140","url":null,"abstract":"In this paper, we investigate the effect of cutting speed on flank wear, crater wear and finished surface roughness during hobbing using an uncoated tool, and TiN- and (Al, Ti)N- coated tools with a minimal quantity lubrication (MQL) system. The experiments were conducted by simulating hobbing by fly tool cutting on a milling machine. The results helped clarify the following points. (1) With the uncoated tool and the TiN-coated tool, the flank wear increases upon increasing in the cutting speed from 47m/min to 86m/min. Conversely, flank wear decreases at the higher speed of 117m/min. It was impossible to cut at 159m/min owing to the failure of the cutting edge. With the (Al, Ti)N-coated tool, the flank wear showed nearly the same small value, irrespective of cutting speed. (2) The cutting speed also has a large effect on crater wear, particularly for the TiN-and (Al, Ti)N-coated tools. The cutting speed of 117m/min is suitable for decreasing crater wear. (3) The finished surface roughness is small for all the tools used in this test for cutting speeds less than 86m/min, after which it becomes large because of the adhesion of deposited metal at cutting speeds more than 117m/min. When using the TiN- and (Al, Ti)N-coated tools, there is a critical cutting groove length, at which the surface roughness decreases rapidly.","PeriodicalId":151961,"journal":{"name":"Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131057089","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: 20

Production Planning and Simulation for Reverse Supply Chain 逆向供应链的生产计划与仿真

Jsme International Journal Series C-mechanical Systems Machine Elements and Manufacturing Pub Date : 2006-06-15 DOI: 10.1299/JSMEC.49.281

T. Murayama, M. Yoda, T. Eguchi, F. Oba

引用次数: 17