Pub Date : 2006-10-01DOI: 10.1109/IFOST.2006.312226
A. Reshetnev, A. Vavilin, Taeho Kim, K. Jo
In this paper, we propose auto-driving method for automobile by recognition of hand trajectory. The method consists of three main steps: hand detection, wheel detection and recognition. On the step of hand detection we extract hand from image by color model. From this step we get candidate for skin regions. The wheel detection consists of edge detection, Hough transform and wheel detection which uses mean shift algorithm. The last step in our method is recognition of hand position. The result is recognition of hand position on the wheel and rotation angle of the wheel.
{"title":"Automobile Driving Interface Based on Hand Trajectory Recognition","authors":"A. Reshetnev, A. Vavilin, Taeho Kim, K. Jo","doi":"10.1109/IFOST.2006.312226","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312226","url":null,"abstract":"In this paper, we propose auto-driving method for automobile by recognition of hand trajectory. The method consists of three main steps: hand detection, wheel detection and recognition. On the step of hand detection we extract hand from image by color model. From this step we get candidate for skin regions. The wheel detection consists of edge detection, Hough transform and wheel detection which uses mean shift algorithm. The last step in our method is recognition of hand position. The result is recognition of hand position on the wheel and rotation angle of the wheel.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"137 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123491553","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 : 2006-10-01DOI: 10.1109/IFOST.2006.312345
E. Kim, K. Lim, Y.H. Kim, K. Lee
For application of cast-forging process with Al-Si hypereutectic alloys, casting experiments are carried out by adding P and Sr to Al-Si hypereutectic alloys for eutectic and primary Si refinement treatment. We experimented on the mechanical properties according to microstructural changes, forging ability test and also investigated the mechanical properties after forging. The finest microstructure could be observed respectively when 0.075 wt.% Sr and 0.1 wt.% P were added. In this case, tensile strength and elongation increased much more than no addition as casting. After high temperature deformation simulation test with grain refinement specimens was carried out about 60 N/mm of specimen was confirmed. After hot forging, tensile strength and elongation wear increased. It was considered that casting defect was removed by compressive working.
{"title":"A Study on the Microstructure Change with Modification and Cast-forging in Hypereutectic Al-Si Alloys","authors":"E. Kim, K. Lim, Y.H. Kim, K. Lee","doi":"10.1109/IFOST.2006.312345","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312345","url":null,"abstract":"For application of cast-forging process with Al-Si hypereutectic alloys, casting experiments are carried out by adding P and Sr to Al-Si hypereutectic alloys for eutectic and primary Si refinement treatment. We experimented on the mechanical properties according to microstructural changes, forging ability test and also investigated the mechanical properties after forging. The finest microstructure could be observed respectively when 0.075 wt.% Sr and 0.1 wt.% P were added. In this case, tensile strength and elongation increased much more than no addition as casting. After high temperature deformation simulation test with grain refinement specimens was carried out about 60 N/mm of specimen was confirmed. After hot forging, tensile strength and elongation wear increased. It was considered that casting defect was removed by compressive working.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124258789","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 : 2006-10-01DOI: 10.1109/IFOST.2006.312218
O. Khasanov, E. Dvilis, V. Sokolov, Y. Pokholkov
The compressibility of the dry BaTi4O9+BaWO4 (BWTO) and ZrO2-3% Y2O3 (TZ-3YS) nanopowders compacted by the ordinary uniaxial pressing, under powerful ultrasonic action (PUA) and by the novel collector method have been investigated. The coefficients of the logarithmic compaction equation in dimensionless form were determined from the experimental compaction diagrams. The BWTO nanopowder had low elastic component of these curves and low springback. The samples of parallelepiped shape (14 mm times 9 mm times 2 mm) were pressed. To decrease the shape distortion of sintered ceramics the green density difference along compaction axis was investigated. It was shown the possibility of green density difference reduction using PUA and collector method at optimal conditions. The uniform distributions of density in volume of the green compacts were achieved at compaction pressure of 640 MPa and power of ultrasonic generator of 2 kW at resonance frequency of 21 kHz.
研究了普通单轴压实、强超声作用(PUA)和新型捕集剂压实BaTi4O9+BaWO4 (BWTO)和ZrO2-3% Y2O3 (TZ-3YS)纳米粉体的可压缩性。根据实验压实图确定了对数压实方程的无因次形式系数。BWTO纳米粉体具有这些曲线的低弹性成分和低回弹。对平行六面体形状(14 mm × 9 mm × 2 mm)的样品进行压制。为了减小烧结陶瓷的形状畸变，研究了沿压实轴方向的生坯密度差。结果表明，在最佳条件下，采用聚丙烯酸(PUA)和捕集剂可以减小绿密度差。当压实压力为640 MPa，超声发生器功率为2 kW，共振频率为21 kHz时，绿坯的密度体积分布均匀。
{"title":"The Control of Shape and Compaction Characteristics of Dry Ba-W-Ti-O Nanopowders by the Powerful Ultrasonic Action","authors":"O. Khasanov, E. Dvilis, V. Sokolov, Y. Pokholkov","doi":"10.1109/IFOST.2006.312218","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312218","url":null,"abstract":"The compressibility of the dry BaTi4O9+BaWO4 (BWTO) and ZrO2-3% Y2O3 (TZ-3YS) nanopowders compacted by the ordinary uniaxial pressing, under powerful ultrasonic action (PUA) and by the novel collector method have been investigated. The coefficients of the logarithmic compaction equation in dimensionless form were determined from the experimental compaction diagrams. The BWTO nanopowder had low elastic component of these curves and low springback. The samples of parallelepiped shape (14 mm times 9 mm times 2 mm) were pressed. To decrease the shape distortion of sintered ceramics the green density difference along compaction axis was investigated. It was shown the possibility of green density difference reduction using PUA and collector method at optimal conditions. The uniform distributions of density in volume of the green compacts were achieved at compaction pressure of 640 MPa and power of ultrasonic generator of 2 kW at resonance frequency of 21 kHz.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115602436","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 : 2006-10-01DOI: 10.1109/IFOST.2006.312312
Hyun-Deok Kang, K. Jo
This paper presents the mapping function of horizontal line segments in panoramic image for 3D reconstruction of planar objects. It is interest to get the 3D geometrical information directly under the single panoramic image. The estimation of the 3D geometric information is to use the several conditions of features such as a vanishing line and point and the geometric relationship of feature as parallelism of lines from single panoramic view. This paper describes the 3D reconstruction about any features using the properties of vanishing points and curves. When the panoramic camera located on ground in perpendicular against the mirror, all vertical line segments are converged into center point in image. Horizontal line with ground plane projected as the curve on the basis of each vanishing point in image; the parallel lines with ground are projected as the curve in panoramic image. Second, it is able to obtain the parallel plane in focal point of mirror using the already known the height of mirror from the ground. The curve of horizontal edge line should intersect with the circle at infinity; two intersection points with pi phase difference converge in pair of vanishing points of each object. Consequently, this paper applies the hyperbolic mirror to get panoramic image and perform the 3D reconstruction. It can be suitable and concrete information of environment so that also robot can know the shape of environment within visible range from single panoramic image.
{"title":"Analysis of Vanishing Curves and Points of Planar Objects from Single Panoramic Image","authors":"Hyun-Deok Kang, K. Jo","doi":"10.1109/IFOST.2006.312312","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312312","url":null,"abstract":"This paper presents the mapping function of horizontal line segments in panoramic image for 3D reconstruction of planar objects. It is interest to get the 3D geometrical information directly under the single panoramic image. The estimation of the 3D geometric information is to use the several conditions of features such as a vanishing line and point and the geometric relationship of feature as parallelism of lines from single panoramic view. This paper describes the 3D reconstruction about any features using the properties of vanishing points and curves. When the panoramic camera located on ground in perpendicular against the mirror, all vertical line segments are converged into center point in image. Horizontal line with ground plane projected as the curve on the basis of each vanishing point in image; the parallel lines with ground are projected as the curve in panoramic image. Second, it is able to obtain the parallel plane in focal point of mirror using the already known the height of mirror from the ground. The curve of horizontal edge line should intersect with the circle at infinity; two intersection points with pi phase difference converge in pair of vanishing points of each object. Consequently, this paper applies the hyperbolic mirror to get panoramic image and perform the 3D reconstruction. It can be suitable and concrete information of environment so that also robot can know the shape of environment within visible range from single panoramic image.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127278809","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 : 2006-10-01DOI: 10.1109/IFOST.2006.312310
W. Xudong, Zhou Meilan, Zhou Yong-qin
In order to abstain from expensive and complicated hydraulic or electric-hydraulic transmission devices, moreover to reduce the oil consumption and improve power performance further, a new type of dry hybrid belt continuously variable transmission (A-CVT)'s structure and work principle are introduced in this paper. The electronic control unit (TCU) has been developed, and the theoretical foundation of optimal speed ratio control of CVT is discussed profoundly. The speed ratio actuator motor is controlled through the method of PID fuzzy controller and non-linear voltage compensation. Through testing with the sample car, which is equipped with the developed TCU, when running at speed of 62.35 Km/h, the oil consumption is 5.64 L per 100 Km and the accelerating time is 22 s while up to 100 Km/h; by comparison, the oil consumption and accelerating time are 5.68 L and 23 s with original TCU in the same situation. The long-term tryout results indicate that the performance of our experimental car comes up to that of archetypal car on the whole. It has fine oil economy and power performance.
{"title":"Research on Electronic Control System of a New-type CVT","authors":"W. Xudong, Zhou Meilan, Zhou Yong-qin","doi":"10.1109/IFOST.2006.312310","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312310","url":null,"abstract":"In order to abstain from expensive and complicated hydraulic or electric-hydraulic transmission devices, moreover to reduce the oil consumption and improve power performance further, a new type of dry hybrid belt continuously variable transmission (A-CVT)'s structure and work principle are introduced in this paper. The electronic control unit (TCU) has been developed, and the theoretical foundation of optimal speed ratio control of CVT is discussed profoundly. The speed ratio actuator motor is controlled through the method of PID fuzzy controller and non-linear voltage compensation. Through testing with the sample car, which is equipped with the developed TCU, when running at speed of 62.35 Km/h, the oil consumption is 5.64 L per 100 Km and the accelerating time is 22 s while up to 100 Km/h; by comparison, the oil consumption and accelerating time are 5.68 L and 23 s with original TCU in the same situation. The long-term tryout results indicate that the performance of our experimental car comes up to that of archetypal car on the whole. It has fine oil economy and power performance.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114402468","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 : 2006-10-01DOI: 10.1109/IFOST.2006.312319
N. Nhờ, Hong‐Hee Lee, Nguyen Huy Khuong
Recently, an on-line step pulse PWM method has been introduced for cascade multilevel inverters. The simplicity of this method was derived from the principle control between two defined trajectories. For achieving good output performances, several exact angular sets are needed to be determined in advance by solving the trigonometric equations. If the number of step levels increases, then solving the transcendental equations for exact solutions may be quite difficult. This paper introduces a simple method to overcome the previously mentioned problem while number of step pulses is high. The principle control between two defined angular trajectories will again be used to obtain a linear control characteristics of fundamental voltages for the entire modulation index, including over modulation and the corresponding limit angular trajectories will be deduced appropriately from sinusoidal reference. The method will be mathematically formulated and validated. Some simulation results will be also presented.
{"title":"Sinusoidal Based Step Pulse PWM Method in Cascade Multilevel Inverters","authors":"N. Nhờ, Hong‐Hee Lee, Nguyen Huy Khuong","doi":"10.1109/IFOST.2006.312319","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312319","url":null,"abstract":"Recently, an on-line step pulse PWM method has been introduced for cascade multilevel inverters. The simplicity of this method was derived from the principle control between two defined trajectories. For achieving good output performances, several exact angular sets are needed to be determined in advance by solving the trigonometric equations. If the number of step levels increases, then solving the transcendental equations for exact solutions may be quite difficult. This paper introduces a simple method to overcome the previously mentioned problem while number of step pulses is high. The principle control between two defined angular trajectories will again be used to obtain a linear control characteristics of fundamental voltages for the entire modulation index, including over modulation and the corresponding limit angular trajectories will be deduced appropriately from sinusoidal reference. The method will be mathematically formulated and validated. Some simulation results will be also presented.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133355426","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 : 2006-10-01DOI: 10.1109/IFOST.2006.312270
Do Minh Ngoc, H. Oh
In this paper, we have proposed a new group dynamic source routing protocol, G-DSR, using a clustering technique for highly dynamic and large ad hoc networks. We focus on pursuing routing stability, making a fast recovery of link failure, and reducing packet overhead caused by the increase of packet header size in traditional source routing protocols. The entire nodes in a network are divided into a disjoint set of clusters, each of them being assigned a unique cluster label. A routing path is represented by a sequence of cluster labels and the nodes having an identical cluster label are responsible for delivering packets cooperatively to the cluster whose cluster label is the next one in the routing path. Because of a high probability of the existence of multiple paths between adjacent clusters, most of link failures are fixed rapidly. The protocol, we believe, is attractive for dealing with real-time traffic in military or commercial wireless networks that consist of a large number of fast moving wireless stations. We compared the protocol by resorting to simulation with some existing protocols. The result is proven to be highly dependable.
{"title":"A Group Dynamic Source Routing Protocol for Mobile Ad Hoc Networks","authors":"Do Minh Ngoc, H. Oh","doi":"10.1109/IFOST.2006.312270","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312270","url":null,"abstract":"In this paper, we have proposed a new group dynamic source routing protocol, G-DSR, using a clustering technique for highly dynamic and large ad hoc networks. We focus on pursuing routing stability, making a fast recovery of link failure, and reducing packet overhead caused by the increase of packet header size in traditional source routing protocols. The entire nodes in a network are divided into a disjoint set of clusters, each of them being assigned a unique cluster label. A routing path is represented by a sequence of cluster labels and the nodes having an identical cluster label are responsible for delivering packets cooperatively to the cluster whose cluster label is the next one in the routing path. Because of a high probability of the existence of multiple paths between adjacent clusters, most of link failures are fixed rapidly. The protocol, we believe, is attractive for dealing with real-time traffic in military or commercial wireless networks that consist of a large number of fast moving wireless stations. We compared the protocol by resorting to simulation with some existing protocols. The result is proven to be highly dependable.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129758687","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 : 2006-10-01DOI: 10.1109/IFOST.2006.312261
R. Lamper, V. Levin, N. Pustovoy
At research of dynamics of longitudinal movement of the flying device with big weights of fuel the problem about fluctuations of thin-walled fuel tanks preliminary is solved. In such problems has well proved a method of finite and boundary elements. This approach allows to lead direct calculation of a sheaf of tanks, that considerably facilitates procedure of construction of mechanical analogue. Dynamic pressure of a liquid upon stacks of a tank within the limits of a direct method of boundary elements is expressed through moving shells and the mass and rigidity matrix of the attached weights of a liquid which joins in the settlement scheme together with matrixes of weights and a tank, received as a result of digitization of a design of a tank on FEM is calculated. After the decision of the generalized problem of own values for the received matrixes integrated characteristics of fluctuations which can be used at construction of mechanical or "matrix" analogue of a tank for the decision of the general problems of flying device dynamics can be found. The way of the description of geometry of a tank on the basis of natural approximation of a curve is offered.
{"title":"The Application of FEM-BEM Approach to Simultaneous Dynamic Analysis of Several Thin-walled Fuel Tanks","authors":"R. Lamper, V. Levin, N. Pustovoy","doi":"10.1109/IFOST.2006.312261","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312261","url":null,"abstract":"At research of dynamics of longitudinal movement of the flying device with big weights of fuel the problem about fluctuations of thin-walled fuel tanks preliminary is solved. In such problems has well proved a method of finite and boundary elements. This approach allows to lead direct calculation of a sheaf of tanks, that considerably facilitates procedure of construction of mechanical analogue. Dynamic pressure of a liquid upon stacks of a tank within the limits of a direct method of boundary elements is expressed through moving shells and the mass and rigidity matrix of the attached weights of a liquid which joins in the settlement scheme together with matrixes of weights and a tank, received as a result of digitization of a design of a tank on FEM is calculated. After the decision of the generalized problem of own values for the received matrixes integrated characteristics of fluctuations which can be used at construction of mechanical or \"matrix\" analogue of a tank for the decision of the general problems of flying device dynamics can be found. The way of the description of geometry of a tank on the basis of natural approximation of a curve is offered.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128829204","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 : 2006-10-01DOI: 10.1109/IFOST.2006.312245
N. Tsuruta, S. Aly, S. Maeda, S. Takahashi, T. Morimoto
Tasks of image recognition become important components for multi-modal interface. For developing feasible components, problems of huge dimensionality and non-linearity must be resolved. Image recognition consists of three stages: calibration stage, feature extraction (or representation) stage and recognition stage. For recognition stage, state of the art methods including nonlinear methods were proposed. On the other hand, linear methods, such as principle component analysis and linear discriminant method, are commonly used yet for feature extraction stage. Self-organizing feature map and spectral clustering are candidates of the non-linear feature extraction. Both methods have many empirical successes because of their simplicity and non-linearity. In this paper, we analyze characteristic of those methods. A summary of their characteristics shows the possibility to combine the both methods into a new approach. To clarify the importance of this topic, we also describe an overview of our multi-modal interface including lip-reading.
{"title":"Self-organizing Map vs. Spectral Clustering on Visual Feature Extraction for Human Interface","authors":"N. Tsuruta, S. Aly, S. Maeda, S. Takahashi, T. Morimoto","doi":"10.1109/IFOST.2006.312245","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312245","url":null,"abstract":"Tasks of image recognition become important components for multi-modal interface. For developing feasible components, problems of huge dimensionality and non-linearity must be resolved. Image recognition consists of three stages: calibration stage, feature extraction (or representation) stage and recognition stage. For recognition stage, state of the art methods including nonlinear methods were proposed. On the other hand, linear methods, such as principle component analysis and linear discriminant method, are commonly used yet for feature extraction stage. Self-organizing feature map and spectral clustering are candidates of the non-linear feature extraction. Both methods have many empirical successes because of their simplicity and non-linearity. In this paper, we analyze characteristic of those methods. A summary of their characteristics shows the possibility to combine the both methods into a new approach. To clarify the importance of this topic, we also describe an overview of our multi-modal interface including lip-reading.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125305790","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 : 2006-10-01DOI: 10.1109/IFOST.2006.312279
Sok-Won Kim
The temperature distribution, the thermal deformation, and the thermal stress of automotive brake disks have quite close relations with car safety; therefore, much research in this field has been performed. However, successful and satisfactory results have not been obtained because the temperature-dependent thermophysical properties of brake disk materials are not sufficiently known. In this study, the thermal diffusivity and the specific heat capacity of three kinds of iron series brake disk materials, FC250, FC170, and FCD50, and two kinds of aluminum series brake disk materials, Al MMC and A356, were measured in the temperature range from room temperature to 500 degC and the thermal conductivity was calculated using the measured thermal diffusivity, specific heat capacity, and density data. The result shows that the thermophysical properties of the aluminum series are larger than those of the iron series by 2-4 times. The obtained data are applicable as basic input data in the study of the temperature distribution and in the thermal analysis of brake disks.
{"title":"Thermophysical Properties of Automotive Brake Disk Materials","authors":"Sok-Won Kim","doi":"10.1109/IFOST.2006.312279","DOIUrl":"https://doi.org/10.1109/IFOST.2006.312279","url":null,"abstract":"The temperature distribution, the thermal deformation, and the thermal stress of automotive brake disks have quite close relations with car safety; therefore, much research in this field has been performed. However, successful and satisfactory results have not been obtained because the temperature-dependent thermophysical properties of brake disk materials are not sufficiently known. In this study, the thermal diffusivity and the specific heat capacity of three kinds of iron series brake disk materials, FC250, FC170, and FCD50, and two kinds of aluminum series brake disk materials, Al MMC and A356, were measured in the temperature range from room temperature to 500 degC and the thermal conductivity was calculated using the measured thermal diffusivity, specific heat capacity, and density data. The result shows that the thermophysical properties of the aluminum series are larger than those of the iron series by 2-4 times. The obtained data are applicable as basic input data in the study of the temperature distribution and in the thermal analysis of brake disks.","PeriodicalId":103784,"journal":{"name":"2006 International Forum on Strategic Technology","volume":"262 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122915918","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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