Pub Date : 1991-12-15DOI: 10.1299/JSMEC1988.34.466
Hiromi Dewa
{"title":"Torsional Damping Characteristics of Rectangular Three-Layered Rods with Viscoelastic Layers : Experimental Evaluation of Sandwich Rod and Covered Rod","authors":"Hiromi Dewa","doi":"10.1299/JSMEC1988.34.466","DOIUrl":"https://doi.org/10.1299/JSMEC1988.34.466","url":null,"abstract":"","PeriodicalId":356058,"journal":{"name":"JSME international journal. Series 3, Vibration, control engineering, engineering for industry","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115828594","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}
Pub Date : 1991-12-15DOI: 10.1299/JSMEC1988.34.518
H. Nagata, A. Ishibashi, S. Hoyashita, H. Takedomi
The mechanism of a continuously variable speed traction drive (CVT) with two internal spherical disks was introduced. Equations were derived for calculating changes in speed ratio and power losses caused by the spinning motion at the contact surface. The effective traction force between contact surfaces with an elliptical shape was calculated using the traction coefficient curves obtained by two roller tests and the resulting empirical equations. In this calculation, the effective pressure was utilized instead of a Hertzian mean pressure. The spinning loss was divided into torque and speed losses at the contact surface. Numerical calculations were performed to estimate the losses produced in a trial CVT with a capacity of about 5 kW at 1800 rpm. The equations developed are aplicable to any other type of CVT after certain modifications.
{"title":"A Variable-Speed Traction Drive with Internal Spherical Disks : Mechanism of Traction Drive and Method for Calculating Power Transmission Efliciency","authors":"H. Nagata, A. Ishibashi, S. Hoyashita, H. Takedomi","doi":"10.1299/JSMEC1988.34.518","DOIUrl":"https://doi.org/10.1299/JSMEC1988.34.518","url":null,"abstract":"The mechanism of a continuously variable speed traction drive (CVT) with two internal spherical disks was introduced. Equations were derived for calculating changes in speed ratio and power losses caused by the spinning motion at the contact surface. The effective traction force between contact surfaces with an elliptical shape was calculated using the traction coefficient curves obtained by two roller tests and the resulting empirical equations. In this calculation, the effective pressure was utilized instead of a Hertzian mean pressure. The spinning loss was divided into torque and speed losses at the contact surface. Numerical calculations were performed to estimate the losses produced in a trial CVT with a capacity of about 5 kW at 1800 rpm. The equations developed are aplicable to any other type of CVT after certain modifications.","PeriodicalId":356058,"journal":{"name":"JSME international journal. Series 3, Vibration, control engineering, engineering for industry","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128656016","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}
Pub Date : 1991-12-15DOI: 10.1299/JSMEC1988.34.503
Hattori Hitoshi, N. Kawashima
A method for dynamic analysis of a rotor-journal bearing system, in which large dynamic loads act on the rotor, is introduced. The governing equations are solved by numerical calculation. The system is analyzed as a coupled problem regarding the equations of motion for a rigid rotor and the Reynolds equations for the oil film in all the bearings supporting the rotor. Then, an analysis method for when a relative misalignment exists between the bearings is also presented. A rigid rotor supported by three bearings was analyzed for use in rotary compressors. The rotor motion, the bearing load characteristics and the misalignment influence are shown as the results of the analysis.
{"title":"Dynamic Analysis of a Rotor-Journal Bearing System with Large Dynamic Loads. Influence of Relative Misalignment between the Bearings on the Characteristics of a Rigid Rotor System.","authors":"Hattori Hitoshi, N. Kawashima","doi":"10.1299/JSMEC1988.34.503","DOIUrl":"https://doi.org/10.1299/JSMEC1988.34.503","url":null,"abstract":"A method for dynamic analysis of a rotor-journal bearing system, in which large dynamic loads act on the rotor, is introduced. The governing equations are solved by numerical calculation. The system is analyzed as a coupled problem regarding the equations of motion for a rigid rotor and the Reynolds equations for the oil film in all the bearings supporting the rotor. Then, an analysis method for when a relative misalignment exists between the bearings is also presented. A rigid rotor supported by three bearings was analyzed for use in rotary compressors. The rotor motion, the bearing load characteristics and the misalignment influence are shown as the results of the analysis.","PeriodicalId":356058,"journal":{"name":"JSME international journal. Series 3, Vibration, control engineering, engineering for industry","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128850348","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}
Pub Date : 1991-12-15DOI: 10.1299/JSMEC1988.34.475
H. Bauer
{"title":"Natural Axisymmetric Frequencies of Cylindrical Liquid Column with Anchored Free Surface","authors":"H. Bauer","doi":"10.1299/JSMEC1988.34.475","DOIUrl":"https://doi.org/10.1299/JSMEC1988.34.475","url":null,"abstract":"","PeriodicalId":356058,"journal":{"name":"JSME international journal. Series 3, Vibration, control engineering, engineering for industry","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129902947","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}
Pub Date : 1991-12-15DOI: 10.1299/JSMEC1988.34.490
H. Kojima, K. Nezu, K. Sakamoto, T. Kawanabe, H. Kojima
A position control system consisting of a linear DC motor and a beam, based on inverse dynamics, is proposed. The rapid and exact control performance is confirmed experimentally and theoretically. In the experiment, the linear DC motor is made of an aluminum coil frame or an acrylic resin coil frame. It is confirmed that, by the present control method, the moving part of the linear DC motor can be controlled accurately to the position control command for an arbitrary settling time without undesirable mechanical vibrations. When the settling time is comparatively long, the wave shape of the control current of the motor is affected mainly by the bending force of the beam. Then, with a decreasing settling time, the inertial force has significant effects on the wave shape of the tontrol current. Furthermore, the numerical simulation results obtained with the finite element method agree well with the experimental results.
{"title":"Rapid Position Control using Feedforward Control based on Inverse Dynamics : The Case of the Mechanical System of Linear DC Motor and Beam","authors":"H. Kojima, K. Nezu, K. Sakamoto, T. Kawanabe, H. Kojima","doi":"10.1299/JSMEC1988.34.490","DOIUrl":"https://doi.org/10.1299/JSMEC1988.34.490","url":null,"abstract":"A position control system consisting of a linear DC motor and a beam, based on inverse dynamics, is proposed. The rapid and exact control performance is confirmed experimentally and theoretically. In the experiment, the linear DC motor is made of an aluminum coil frame or an acrylic resin coil frame. It is confirmed that, by the present control method, the moving part of the linear DC motor can be controlled accurately to the position control command for an arbitrary settling time without undesirable mechanical vibrations. When the settling time is comparatively long, the wave shape of the control current of the motor is affected mainly by the bending force of the beam. Then, with a decreasing settling time, the inertial force has significant effects on the wave shape of the tontrol current. Furthermore, the numerical simulation results obtained with the finite element method agree well with the experimental results.","PeriodicalId":356058,"journal":{"name":"JSME international journal. Series 3, Vibration, control engineering, engineering for industry","volume":"131 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116303967","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}
Pub Date : 1991-12-15DOI: 10.1299/JSMEC1988.34.546
Sawai Sukvittayawong, I. Inasaki
The needs of today's complex manufacturing systems requires the use of machine tools operated by means of an adaptively controlled system. Adaptive control provides continuous monitoring of performance and adjusts the system variables in order to approach the conditions optimum for the chosen performance objectives. This investigation proposes the in-process parameter estimation method of tool life in turning, in which the force ratio of feed force to tangential force due to the tool wear is detected. The method involves the analysis of the optimum cutting conditions based on the machining cost per unit volume of metal removed under the considered cutting constraints.
{"title":"OPTIMIZATION OF TURNING PROCESS BY CUTTING FORCE MEASUREMENT","authors":"Sawai Sukvittayawong, I. Inasaki","doi":"10.1299/JSMEC1988.34.546","DOIUrl":"https://doi.org/10.1299/JSMEC1988.34.546","url":null,"abstract":"The needs of today's complex manufacturing systems requires the use of machine tools operated by means of an adaptively controlled system. Adaptive control provides continuous monitoring of performance and adjusts the system variables in order to approach the conditions optimum for the chosen performance objectives. This investigation proposes the in-process parameter estimation method of tool life in turning, in which the force ratio of feed force to tangential force due to the tool wear is detected. The method involves the analysis of the optimum cutting conditions based on the machining cost per unit volume of metal removed under the considered cutting constraints.","PeriodicalId":356058,"journal":{"name":"JSME international journal. Series 3, Vibration, control engineering, engineering for industry","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125966455","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}
Pub Date : 1991-09-15DOI: 10.1299/JSMEC1988.34.377
Jong‐Hwei Wei, M. Shih, C. Chiu
{"title":"Model-following PID control using hyperstability theory","authors":"Jong‐Hwei Wei, M. Shih, C. Chiu","doi":"10.1299/JSMEC1988.34.377","DOIUrl":"https://doi.org/10.1299/JSMEC1988.34.377","url":null,"abstract":"","PeriodicalId":356058,"journal":{"name":"JSME international journal. Series 3, Vibration, control engineering, engineering for industry","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129377956","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}
Pub Date : 1991-09-15DOI: 10.1299/JSMEC1988.34.382
H. Funabashi, M. Horie, T. Kubota, Y. Takeda
In the present paper, kinematic structures of spatial 6-degree-of-freedom (dof) parallel manipulators are obtained by a number synthesis of multiloop linkages which consist of pairs with 1, 2 and/or 3 dof and have no moving closed loops. Concerning simple and practical manipulators among the obtained ones, that is, concerning the parallel manipulator consisting of six arms, each of which has three revolute pairs and a spheric pair, analytical equations for inverse and direct kinematics are derived and singular positions where the configurations of the manipulator cannot be defined are discussed. Moreover, taking account of allowable pressure angles and maximum swing angles of spheric pairs, the relation between the working space and parameters of the manipulator is investigated, revealing that the manipulator can operate with larger vertical motions than the Stewart Platform.
{"title":"Development of Spatial Parallel Manipulators with Six Degrees of Freedom","authors":"H. Funabashi, M. Horie, T. Kubota, Y. Takeda","doi":"10.1299/JSMEC1988.34.382","DOIUrl":"https://doi.org/10.1299/JSMEC1988.34.382","url":null,"abstract":"In the present paper, kinematic structures of spatial 6-degree-of-freedom (dof) parallel manipulators are obtained by a number synthesis of multiloop linkages which consist of pairs with 1, 2 and/or 3 dof and have no moving closed loops. Concerning simple and practical manipulators among the obtained ones, that is, concerning the parallel manipulator consisting of six arms, each of which has three revolute pairs and a spheric pair, analytical equations for inverse and direct kinematics are derived and singular positions where the configurations of the manipulator cannot be defined are discussed. Moreover, taking account of allowable pressure angles and maximum swing angles of spheric pairs, the relation between the working space and parameters of the manipulator is investigated, revealing that the manipulator can operate with larger vertical motions than the Stewart Platform.","PeriodicalId":356058,"journal":{"name":"JSME international journal. Series 3, Vibration, control engineering, engineering for industry","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124585847","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}
Pub Date : 1991-09-15DOI: 10.1299/JSMEC1988.34.404
S. Fukata, Yoshinori Kouya, T. Shimomachi, Y. Mizumachi, Makoto Kuga
{"title":"Dynamics of Active Magnetic Thrust Bearings","authors":"S. Fukata, Yoshinori Kouya, T. Shimomachi, Y. Mizumachi, Makoto Kuga","doi":"10.1299/JSMEC1988.34.404","DOIUrl":"https://doi.org/10.1299/JSMEC1988.34.404","url":null,"abstract":"","PeriodicalId":356058,"journal":{"name":"JSME international journal. Series 3, Vibration, control engineering, engineering for industry","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126836278","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}
Pub Date : 1991-09-15DOI: 10.1299/JSMEC1988.34.438
Mitsuru Nakamura, H. Hata, Yozo Nakamura, T. Endo, K. Iizuka
In the previous paper, the authors proposed torque control systems that may be effective to reduce vibration of a rolling piston-type compressor for a room air conditioner. This paper deals mainly with the experimental results of the torque control systems. Two types of control models, a "rotational speed control model" and a "rotational acceleration control model" were used, and the stability and the transient response were discussed in comparison with the simulation. It was shown that the experimental results generally agreed well with the simulaion predictions, although the degree of actual Control effects was a slightly inferior because of detection errors and response lags in the actual control system. By comparing both control systems wlth each other, it was proven that the rotational acceleration control system is superior and can reduce the compressor chamber vibration in a stabler and faster response.
{"title":"Vibration reduction in rolling piston-type compressors through motor torque control (experimental study on control effects)","authors":"Mitsuru Nakamura, H. Hata, Yozo Nakamura, T. Endo, K. Iizuka","doi":"10.1299/JSMEC1988.34.438","DOIUrl":"https://doi.org/10.1299/JSMEC1988.34.438","url":null,"abstract":"In the previous paper, the authors proposed torque control systems that may be effective to reduce vibration of a rolling piston-type compressor for a room air conditioner. This paper deals mainly with the experimental results of the torque control systems. Two types of control models, a \"rotational speed control model\" and a \"rotational acceleration control model\" were used, and the stability and the transient response were discussed in comparison with the simulation. It was shown that the experimental results generally agreed well with the simulaion predictions, although the degree of actual Control effects was a slightly inferior because of detection errors and response lags in the actual control system. By comparing both control systems wlth each other, it was proven that the rotational acceleration control system is superior and can reduce the compressor chamber vibration in a stabler and faster response.","PeriodicalId":356058,"journal":{"name":"JSME international journal. Series 3, Vibration, control engineering, engineering for industry","volume":"240 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121982334","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}
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