Pub Date : 1998-04-24DOI: 10.1109/SECON.1998.673285
M.G. Haralambous, Daniel Negvesky
Summary form only given. Finite element modeling of a cantilever beam and active vibration control are implemented within the MATLAB environment. Using classical root locus design techniques, a lead-lag compensator is designed to stabilize the beam and to eliminate the effect of a step disturbance. This utilization of the finite element method and control system theory in a common software environment has valuable applications in active vibration control of more complex mechanical systems such as space structures and lasers.
{"title":"Finite element analysis and active vibration control of a cantilever beam","authors":"M.G. Haralambous, Daniel Negvesky","doi":"10.1109/SECON.1998.673285","DOIUrl":"https://doi.org/10.1109/SECON.1998.673285","url":null,"abstract":"Summary form only given. Finite element modeling of a cantilever beam and active vibration control are implemented within the MATLAB environment. Using classical root locus design techniques, a lead-lag compensator is designed to stabilize the beam and to eliminate the effect of a step disturbance. This utilization of the finite element method and control system theory in a common software environment has valuable applications in active vibration control of more complex mechanical systems such as space structures and lasers.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133353950","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 : 1998-04-24DOI: 10.1109/SECON.1998.673308
J. P. Donohoe
Summary form only given. Discusses the interaction of a transient EM field with a conducting cylindrical body. The physical features of the body-of-revolution (BOR) model and the characteristics of the incident wave are of prime importance with regard to the means of interaction. The conducting BOR studied is a simplified missile structure consisting of a straight cylinder which is closed with an endcap on one end and linearly-tapered to a circular aperture on the opposite end. Different types of incident ultra-wideband plane waves are considered. The standard Gaussian temporal waveshape is investigated along with a wave that resembles a short single cycle sine wave (designated as the non-Gaussian plane wave). The structure response which is of particular interest is the axial electric field at the center of the BOR aperture which represents the field in the nose cone of the missile. The fins and other external details are omitted in this model since the dominant structure resonance corresponds to longitudinal skin currents occurring at a frequency where the axial length of the BOR is approximately one-half wavelength. The time domain response of the BOR to a given incident pulse is determined via the following approach. The response of the BOR to a true time-domain impulse (flat spectrum) is computed in the frequency domain via the method of moments. The range of frequencies computed is governed by the upper limit on the spectral content of the incident pulse. The product of the incident pulse spectrum and the impulse spectral response is found and the overall time-domain response is determined.
{"title":"Temporal near fields of a missile structure under plane wave illumination","authors":"J. P. Donohoe","doi":"10.1109/SECON.1998.673308","DOIUrl":"https://doi.org/10.1109/SECON.1998.673308","url":null,"abstract":"Summary form only given. Discusses the interaction of a transient EM field with a conducting cylindrical body. The physical features of the body-of-revolution (BOR) model and the characteristics of the incident wave are of prime importance with regard to the means of interaction. The conducting BOR studied is a simplified missile structure consisting of a straight cylinder which is closed with an endcap on one end and linearly-tapered to a circular aperture on the opposite end. Different types of incident ultra-wideband plane waves are considered. The standard Gaussian temporal waveshape is investigated along with a wave that resembles a short single cycle sine wave (designated as the non-Gaussian plane wave). The structure response which is of particular interest is the axial electric field at the center of the BOR aperture which represents the field in the nose cone of the missile. The fins and other external details are omitted in this model since the dominant structure resonance corresponds to longitudinal skin currents occurring at a frequency where the axial length of the BOR is approximately one-half wavelength. The time domain response of the BOR to a given incident pulse is determined via the following approach. The response of the BOR to a true time-domain impulse (flat spectrum) is computed in the frequency domain via the method of moments. The range of frequencies computed is governed by the upper limit on the spectral content of the incident pulse. The product of the incident pulse spectrum and the impulse spectral response is found and the overall time-domain response is determined.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132686506","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 : 1998-04-24DOI: 10.1109/SECON.1998.673361
J. Dobrzanski, G. Gleason
This paper describes a computer simulation developed for spaceborne radar altimeter applications. The simulation uses a behavioral model for an orbiting altimeter. The model developed is based on the GEOSAT Follow-On Radar Altimeter, but is general in nature and can be used as an analysis or design tool for altimeter design development, or testing.
{"title":"Simulation of a spaceborne radar altimeter","authors":"J. Dobrzanski, G. Gleason","doi":"10.1109/SECON.1998.673361","DOIUrl":"https://doi.org/10.1109/SECON.1998.673361","url":null,"abstract":"This paper describes a computer simulation developed for spaceborne radar altimeter applications. The simulation uses a behavioral model for an orbiting altimeter. The model developed is based on the GEOSAT Follow-On Radar Altimeter, but is general in nature and can be used as an analysis or design tool for altimeter design development, or testing.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114634273","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 : 1998-04-24DOI: 10.1109/SECON.1998.673302
A. A. Mutlu, E. Makram
This paper introduces methods to find the location and size of series capacitor. The methods use reactive power loss sensitivity index (RPLSI) to find the location of series capacitor, and calculate the degree of series compensation to maximize the power flow. It is also shown that series compensation can be represented in Z/sub bus/ by adding a new parallel line. Finally the line flows of the compensated system is calculated using the base case power flow of the original system and the decoupled form of Jacobian matrix.
{"title":"Analysis of series compensation from different aspects","authors":"A. A. Mutlu, E. Makram","doi":"10.1109/SECON.1998.673302","DOIUrl":"https://doi.org/10.1109/SECON.1998.673302","url":null,"abstract":"This paper introduces methods to find the location and size of series capacitor. The methods use reactive power loss sensitivity index (RPLSI) to find the location of series capacitor, and calculate the degree of series compensation to maximize the power flow. It is also shown that series compensation can be represented in Z/sub bus/ by adding a new parallel line. Finally the line flows of the compensated system is calculated using the base case power flow of the original system and the decoupled form of Jacobian matrix.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116035232","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 : 1998-04-24DOI: 10.1109/SECON.1998.673278
M. Kovač
Efficient analysis of data is crucial in decision-making processes. In this paper, we present a new, powerful but easy-to-learn computer language for measurement data analysis. The language, which is called A++, allows multiple hierarchical levels of analysis, has an intuitive format for its analysis formulas, and is well-suited for field usage.
{"title":"A++: simple, intuitive and modular computer language for measurement data analysis","authors":"M. Kovač","doi":"10.1109/SECON.1998.673278","DOIUrl":"https://doi.org/10.1109/SECON.1998.673278","url":null,"abstract":"Efficient analysis of data is crucial in decision-making processes. In this paper, we present a new, powerful but easy-to-learn computer language for measurement data analysis. The language, which is called A++, allows multiple hierarchical levels of analysis, has an intuitive format for its analysis formulas, and is well-suited for field usage.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"93 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124659639","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 : 1998-04-24DOI: 10.1109/SECON.1998.673349
G.L. Colmenares, R. Perez
Prediction is an important application of neural networks. When a large data source is used to train a neural network model to make prediction, considerable effort and time are required to obtain reliable outcomes. This paper describes a technique that reduces the size of a large data set but still preserves the pertinent characteristics of the problem domain in the data. Neural network models built using this reduced data set show nearly identical performance on the same set of test cases than models built using the full size data set.
{"title":"A data reduction method to train, test, and validate neural networks","authors":"G.L. Colmenares, R. Perez","doi":"10.1109/SECON.1998.673349","DOIUrl":"https://doi.org/10.1109/SECON.1998.673349","url":null,"abstract":"Prediction is an important application of neural networks. When a large data source is used to train a neural network model to make prediction, considerable effort and time are required to obtain reliable outcomes. This paper describes a technique that reduces the size of a large data set but still preserves the pertinent characteristics of the problem domain in the data. Neural network models built using this reduced data set show nearly identical performance on the same set of test cases than models built using the full size data set.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"1981 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127484300","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 : 1998-04-24DOI: 10.1109/SECON.1998.673326
J. Ashley, J. F. Heneage
A need exists for a rigorous definition of the kinds of fringing fields found near power lines and appliances such as computer monitors and television receivers. Basic definitions of the electrical quantities are presented. Understanding the electromagnetic theory of audio frequency fields is approached by the definition of a scalar electric potential function /spl Phi/ and a vector magnetic potential function A. The proper vector calculus derivatives of these potential functions yield mathematical definitions for the electric field E, and the magnetic intensity H. The theoretical physics approach to power line safety problems is based on the mathematical theory of boundary values on partial differential equations. The theory of an electromagnetic traveling wave is sketched. It is a special combination of magnetic and electric fields that is nearly impossible to attain at audio frequencies.
{"title":"The theory of audio frequency magnetic or electric fields. I. Physics theory","authors":"J. Ashley, J. F. Heneage","doi":"10.1109/SECON.1998.673326","DOIUrl":"https://doi.org/10.1109/SECON.1998.673326","url":null,"abstract":"A need exists for a rigorous definition of the kinds of fringing fields found near power lines and appliances such as computer monitors and television receivers. Basic definitions of the electrical quantities are presented. Understanding the electromagnetic theory of audio frequency fields is approached by the definition of a scalar electric potential function /spl Phi/ and a vector magnetic potential function A. The proper vector calculus derivatives of these potential functions yield mathematical definitions for the electric field E, and the magnetic intensity H. The theoretical physics approach to power line safety problems is based on the mathematical theory of boundary values on partial differential equations. The theory of an electromagnetic traveling wave is sketched. It is a special combination of magnetic and electric fields that is nearly impossible to attain at audio frequencies.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125403241","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 : 1998-04-24DOI: 10.1109/SECON.1998.673360
S.M. Vergenz, C. G. Christodoulou, W. L. Jones
Conceptual designs are presented for an improved Doppler wind profiler system to support space shuttle launches from NASA Kennedy Space Center. This system is based upon extending KSC's current monostatic wind profiler to the bistatic configuration. Results are presented for several bistatic antenna sub-systems that produced acceptable wind profiler performance.
{"title":"50 MHz bistatic wind profiling","authors":"S.M. Vergenz, C. G. Christodoulou, W. L. Jones","doi":"10.1109/SECON.1998.673360","DOIUrl":"https://doi.org/10.1109/SECON.1998.673360","url":null,"abstract":"Conceptual designs are presented for an improved Doppler wind profiler system to support space shuttle launches from NASA Kennedy Space Center. This system is based upon extending KSC's current monostatic wind profiler to the bistatic configuration. Results are presented for several bistatic antenna sub-systems that produced acceptable wind profiler performance.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121492658","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 : 1998-04-24DOI: 10.1109/SECON.1998.673310
Chung-Min Chen, R. Qiu, N. Rishe
This paper describes a pipelined processing technique for queries involving data from distributed, autonomous relational databases. We highlight the basic idea, present a preliminary result, and sketched the planned work towards the development of a more complete multi-database query processor based on the proposed idea.
{"title":"A pipelined query processor for distributed multi-databases","authors":"Chung-Min Chen, R. Qiu, N. Rishe","doi":"10.1109/SECON.1998.673310","DOIUrl":"https://doi.org/10.1109/SECON.1998.673310","url":null,"abstract":"This paper describes a pipelined processing technique for queries involving data from distributed, autonomous relational databases. We highlight the basic idea, present a preliminary result, and sketched the planned work towards the development of a more complete multi-database query processor based on the proposed idea.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"30 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113974475","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 : 1998-04-24DOI: 10.1109/SECON.1998.673305
S. Odeh, I. Shdaifat, B. Kahhaleh, I. Zabalawi
This paper presents an on-line weighted median filter architecture that is simple, fast, cost effective, and easy to implement. It has a great potential for being used in rank order filtering and image processing. The use of this architecture-which implements a high degree of parallelism-is not limited to weighted median filtering for it can be used in sorting any set of data on-the-fly, which makes it amenable to real-time image processing.
{"title":"A fast weighted median filter architecture for image processing","authors":"S. Odeh, I. Shdaifat, B. Kahhaleh, I. Zabalawi","doi":"10.1109/SECON.1998.673305","DOIUrl":"https://doi.org/10.1109/SECON.1998.673305","url":null,"abstract":"This paper presents an on-line weighted median filter architecture that is simple, fast, cost effective, and easy to implement. It has a great potential for being used in rank order filtering and image processing. The use of this architecture-which implements a high degree of parallelism-is not limited to weighted median filtering for it can be used in sorting any set of data on-the-fly, which makes it amenable to real-time image processing.","PeriodicalId":281991,"journal":{"name":"Proceedings IEEE Southeastcon '98 'Engineering for a New Era'","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1998-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131257493","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：