Mesh quality refers to the rational mesh geometry shape. Mesh quality will influence the precision of calculating, and poor quality will even stop calculation. Hypermesh is a finite element processor with high-performance; it can effectively solve the problems of FEM model establishment. This paper adopts Hypermesh to establish the complicated turbine blade FEM model; Not only the data integrity of the model is checked, but also the quality of mesh is examined. The file interface between Hypermesh and ProCAST is also established, which can simplify the simulation process. The methods which have been proposed in this paper can provide an accurate and simple way to analysis the complex turbine blades investment casting process based on numerical simulation technology.
{"title":"Finite Element Model of Aero Turbine Blades Investment Casting Process Based on Hypermesh","authors":"Dou Yangqing, Bu Kun, Dou Yangliu","doi":"10.1109/ICECE.2010.678","DOIUrl":"https://doi.org/10.1109/ICECE.2010.678","url":null,"abstract":"Mesh quality refers to the rational mesh geometry shape. Mesh quality will influence the precision of calculating, and poor quality will even stop calculation. Hypermesh is a finite element processor with high-performance; it can effectively solve the problems of FEM model establishment. This paper adopts Hypermesh to establish the complicated turbine blade FEM model; Not only the data integrity of the model is checked, but also the quality of mesh is examined. The file interface between Hypermesh and ProCAST is also established, which can simplify the simulation process. The methods which have been proposed in this paper can provide an accurate and simple way to analysis the complex turbine blades investment casting process based on numerical simulation technology.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"142 1","pages":"2776-2779"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77787706","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}
Han-Chul Yun, Cheng Xin-wen, Sun Hua, Zhao Li-jian
The emergence of airborne LIDAR system provides a new technical method for fast acquisition and processing of the spatial three-dimensional data. The limitations of traditional techniques are overcome by LIDRA, using of non-contact scanning data to obtain high-precision 3D data, it be able to work in all-weather, with a quickly scanning speed, strong real-time, all-digital processing and so on. The coordinates of laser pin-point can be abtained by calculating the spatial orientation vector of known points to the unknown point in LIDRA system. The composition of systems is very complex, so the laser point coordinates location will effected by system error and accidental error of the LIADR system. The status quo of airborne laser scanning was briefly introduced in this paper. On the basis of airborne laser scanning system positioning principle, the impact of the pitch angle, roll angle, yaw angle and synthetic attitude error of IMU on laser point positioning accuracy was detailedly analyzed. After simulated calculations using IMU practical measurement accuracy presently, some useful conclusions were obtained, which have certain guiding significance for the understanding of airborne laser positioning accuracy and practical application.
{"title":"Influence and Analysis of IMU Attitude Measurement Error on Laser Point Accuracy","authors":"Han-Chul Yun, Cheng Xin-wen, Sun Hua, Zhao Li-jian","doi":"10.1109/ICECE.2010.298","DOIUrl":"https://doi.org/10.1109/ICECE.2010.298","url":null,"abstract":"The emergence of airborne LIDAR system provides a new technical method for fast acquisition and processing of the spatial three-dimensional data. The limitations of traditional techniques are overcome by LIDRA, using of non-contact scanning data to obtain high-precision 3D data, it be able to work in all-weather, with a quickly scanning speed, strong real-time, all-digital processing and so on. The coordinates of laser pin-point can be abtained by calculating the spatial orientation vector of known points to the unknown point in LIDRA system. The composition of systems is very complex, so the laser point coordinates location will effected by system error and accidental error of the LIADR system. The status quo of airborne laser scanning was briefly introduced in this paper. On the basis of airborne laser scanning system positioning principle, the impact of the pitch angle, roll angle, yaw angle and synthetic attitude error of IMU on laser point positioning accuracy was detailedly analyzed. After simulated calculations using IMU practical measurement accuracy presently, some useful conclusions were obtained, which have certain guiding significance for the understanding of airborne laser positioning accuracy and practical application.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"41 1","pages":"1196-1199"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77844809","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}
This paper presents a multiple hypothesis tracking (MHT) method for tracking extended targets. Measurements of extended target can provide much new information such as the shape and the size of the target, as well as the kinematic state. The new proposed MHT method can make use of the extra information, especially the target extent, to evaluate the tracks. We demonstrate the performance of the method in the case of tracking an extended target whose shape is modeled as an ellipse. The new proposed method has better performance than the conventional MHT.
{"title":"A Multiple Hypothesis Tracking Method for Extended Target Tracking","authors":"Guan Zhai, H. Meng, Zhiwen Zhong, Xiqin Wang","doi":"10.1109/ICECE.2010.35","DOIUrl":"https://doi.org/10.1109/ICECE.2010.35","url":null,"abstract":"This paper presents a multiple hypothesis tracking (MHT) method for tracking extended targets. Measurements of extended target can provide much new information such as the shape and the size of the target, as well as the kinematic state. The new proposed MHT method can make use of the extra information, especially the target extent, to evaluate the tracks. We demonstrate the performance of the method in the case of tracking an extended target whose shape is modeled as an ellipse. The new proposed method has better performance than the conventional MHT.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"36 1","pages":"109-112"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77981384","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}
Lifang Dong, Wei-yuan Liu, Yu-jie Yang, Shuai Wang
A 3cm long plasma torch is generated when argon gas is introduced by using a hollowneedle-plate discharge device working in atmosphere. The electron excited temperature, vibrational temperature and the gas temperature at different positions of plasma torch are studied by using optical emission spectrum. The gas temperature is obtained by comparing experimental line shape of OH radicals band around 309nm with its simulated line shape. The vibrational temperature is calculated using second positive band system. The electron excited temperature is obtained by the ratio of the spectral lines of Ar I 763.5nm and Ar I 772.4nm. It is found that the gas temperature is 310K at different positions of plasma torch, vibrational temperature increases from 1740K at arc root to 1790K at arc tip, and electron excited temperature decreases from 4200K at arc root to 3250K at arc tip.
利用在大气中工作的空心针板放电装置，引入氩气，产生3cm长的等离子体炬。利用发射光谱研究了等离子炬不同位置的电子激发温度、振动温度和气体温度。通过对比309nm左右OH自由基带的实验线形和模拟线形，得到了气体温度。采用第二正带系统计算振动温度。利用Ar I 763.5nm与Ar I 772.4nm光谱线之比得到了电子激发温度。结果表明，等离子体炬不同位置的气体温度为310K，振动温度从电弧根部的1740K上升到电弧尖端的1790K，电子激发温度从电弧根部的4200K下降到电弧尖端的3250K。
{"title":"Spatial Distributions of Plasma Temperature in Hollowneedle-Plate Discharge","authors":"Lifang Dong, Wei-yuan Liu, Yu-jie Yang, Shuai Wang","doi":"10.1109/ICECE.2010.487","DOIUrl":"https://doi.org/10.1109/ICECE.2010.487","url":null,"abstract":"A 3cm long plasma torch is generated when argon gas is introduced by using a hollowneedle-plate discharge device working in atmosphere. The electron excited temperature, vibrational temperature and the gas temperature at different positions of plasma torch are studied by using optical emission spectrum. The gas temperature is obtained by comparing experimental line shape of OH radicals band around 309nm with its simulated line shape. The vibrational temperature is calculated using second positive band system. The electron excited temperature is obtained by the ratio of the spectral lines of Ar I 763.5nm and Ar I 772.4nm. It is found that the gas temperature is 310K at different positions of plasma torch, vibrational temperature increases from 1740K at arc root to 1790K at arc tip, and electron excited temperature decreases from 4200K at arc root to 3250K at arc tip.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"73 1","pages":"1981-1984"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78102474","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}
With the development of switch power supply and the inverter welding power machine, the traditional PFM and PWM working method have been improved. In inverter welding machine power the CIC control method has been used in laboratory, and in computer and communication switch power supply the CIC control have been used in practice.
{"title":"Comparison of CIC and V2 Control","authors":"Xiao Zhou, Zhaohong Xie, Yuan Wen","doi":"10.1109/ICECE.2010.845","DOIUrl":"https://doi.org/10.1109/ICECE.2010.845","url":null,"abstract":"With the development of switch power supply and the inverter welding power machine, the traditional PFM and PWM working method have been improved. In inverter welding machine power the CIC control method has been used in laboratory, and in computer and communication switch power supply the CIC control have been used in practice.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"64 1","pages":"3474-3477"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78191663","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}
Heavy duty machinery and constructive engineering need low height force transducer to measure great force. Because assembling space is not enough, it is necessary to design a special force transducer. Thus, hollow cylinder type force transducer with ultra low height is designed and experimented especially. The ratio of the height of hollow cylinder-type force transducer to the diameter of hollow cylinder-type force transducer is limited to less than 7/4. To break the limitation, two cases of the transducer are designed and studied, experimented data are processed by MATLAB.
{"title":"Design and Measurement of Hollow Cylinder Type Force Transducer with Ultra Low Height","authors":"Keqin Li, Chaofu Zhu","doi":"10.1109/ICECE.2010.863","DOIUrl":"https://doi.org/10.1109/ICECE.2010.863","url":null,"abstract":"Heavy duty machinery and constructive engineering need low height force transducer to measure great force. Because assembling space is not enough, it is necessary to design a special force transducer. Thus, hollow cylinder type force transducer with ultra low height is designed and experimented especially. The ratio of the height of hollow cylinder-type force transducer to the diameter of hollow cylinder-type force transducer is limited to less than 7/4. To break the limitation, two cases of the transducer are designed and studied, experimented data are processed by MATLAB.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"74 1","pages":"3546-3548"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79860165","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}
Arc fusion method in a submerged arc furnace has been successfully employed to grow high quality magnesium oxide (MgO) single crystals. In present study, a 3D thermal model based on finite element method was used to quantify the power consumption in the smelting process. The Joule heating power and the voltage of the bath was predicted by the model, and then according to energy conservation, the arc efficiency and its voltage were calculated. Moreover, the bath boundary was also depicted by the model, and it was found that the location of high qualified MgO single crystals were mainly around the arc-shape bottom of solidified MgO.
{"title":"Analysis of Power Consumption in a Submerged Arc Furnace for MgO Single Crystal Production","authors":"Zhen Wang, Ninghui Wang, Tie Li","doi":"10.1109/ICECE.2010.112","DOIUrl":"https://doi.org/10.1109/ICECE.2010.112","url":null,"abstract":"Arc fusion method in a submerged arc furnace has been successfully employed to grow high quality magnesium oxide (MgO) single crystals. In present study, a 3D thermal model based on finite element method was used to quantify the power consumption in the smelting process. The Joule heating power and the voltage of the bath was predicted by the model, and then according to energy conservation, the arc efficiency and its voltage were calculated. Moreover, the bath boundary was also depicted by the model, and it was found that the location of high qualified MgO single crystals were mainly around the arc-shape bottom of solidified MgO.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"26 1","pages":"433-436"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79887500","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}
In order to investigate the effect of grain size and thickness with respect to material mechanical property in the micro-scale, experiments were taken by tensile test on H62 brass sheet metal with different grain sizes and thicknesses. The experiment results show that the flow stress decreases with the decreasing sheet metal thickness, and the flow stress decreases as grain size increases. It also shows that the hardening exponent of sheet metal increases as sheet thickness and sheet grain sizes increasing respectively. A parameter φ=t/d(the ratio of sheet thickness to material grain size) was introduced to characterize size effects, then, a new constitutive model, which consider the factor φ, was developed by combining the surface layer theory and the Swift model. A good coincidence was obtained between the proposed model and experimental results. This investigation can provides some support for theoretical and experimental study of micro-forming.
{"title":"Research on the Micro-tensile Test on H62 Brass Sheet and Size Effects","authors":"Wei Ziyun, L. Fang","doi":"10.1109/ICECE.2010.1431","DOIUrl":"https://doi.org/10.1109/ICECE.2010.1431","url":null,"abstract":"In order to investigate the effect of grain size and thickness with respect to material mechanical property in the micro-scale, experiments were taken by tensile test on H62 brass sheet metal with different grain sizes and thicknesses. The experiment results show that the flow stress decreases with the decreasing sheet metal thickness, and the flow stress decreases as grain size increases. It also shows that the hardening exponent of sheet metal increases as sheet thickness and sheet grain sizes increasing respectively. A parameter φ=t/d(the ratio of sheet thickness to material grain size) was introduced to characterize size effects, then, a new constitutive model, which consider the factor φ, was developed by combining the surface layer theory and the Swift model. A good coincidence was obtained between the proposed model and experimental results. This investigation can provides some support for theoretical and experimental study of micro-forming.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"10 1","pages":"5542-5545"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77062570","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}
This paper introduces the way to minimize the phase noise of VCO using LC 2nd harmonic wave filtering technology, and fulfills the design of 1.8GHz low phase noise, low power consumption VCO with TSMC RF CMOS 0.18μm standard technique. The tuning range reaches 560MHz, phase noise - 121dBc/ Hz@1 MHz. The method, introduced in the paper to minimizing phase noise of VCO, puts forward a valuable reference to integrated circuit design.
{"title":"Simulation Design of LC VCO Based on 0.18µm CMOS Technique","authors":"Ye Jianfang, Jin Jiaxi","doi":"10.1109/ICECE.2010.470","DOIUrl":"https://doi.org/10.1109/ICECE.2010.470","url":null,"abstract":"This paper introduces the way to minimize the phase noise of VCO using LC 2nd harmonic wave filtering technology, and fulfills the design of 1.8GHz low phase noise, low power consumption VCO with TSMC RF CMOS 0.18μm standard technique. The tuning range reaches 560MHz, phase noise - 121dBc/ Hz@1 MHz. The method, introduced in the paper to minimizing phase noise of VCO, puts forward a valuable reference to integrated circuit design.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"18 1","pages":"1911-1914"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82132169","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}
A rotor system supported on active magnetic bearings (AMB) is an unstable system, a control system must be installed in order to realize the system stability. The controller has a great effect on the dynamic behavior of a rotor supported on the AMBs. The basic principles of PD controller, direct fuzzy controller, fuzzy PD controller and controller were introduced, these controllers were then realized in the d-SPACE control platform, and applied to a rigid rotor on the AMBs. The performances of these four controllers, such as step response, tracking a sinusoidal reference signal and simulation rotating debugging, were experimentally measured. Some conclusions can be gotten through the experiments.
{"title":"The Effect of Controllers on the Dynamic Behaviour of a Rotor Supported on Active Magnetic Bearings","authors":"Wang Ding, Z. Changsheng, Tang Ming, Zuo Bin","doi":"10.1109/ICECE.2010.576","DOIUrl":"https://doi.org/10.1109/ICECE.2010.576","url":null,"abstract":"A rotor system supported on active magnetic bearings (AMB) is an unstable system, a control system must be installed in order to realize the system stability. The controller has a great effect on the dynamic behavior of a rotor supported on the AMBs. The basic principles of PD controller, direct fuzzy controller, fuzzy PD controller and controller were introduced, these controllers were then realized in the d-SPACE control platform, and applied to a rigid rotor on the AMBs. The performances of these four controllers, such as step response, tracking a sinusoidal reference signal and simulation rotating debugging, were experimentally measured. Some conclusions can be gotten through the experiments.","PeriodicalId":6419,"journal":{"name":"2010 International Conference on Electrical and Control Engineering","volume":"12 1","pages":"2336-2339"},"PeriodicalIF":0.0,"publicationDate":"2010-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82434667","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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