Pub Date : 1990-03-11DOI: 10.1109/SSST.1990.138174
G. Hines, J. Stoughton, T. Shull, L. Matthias
The architecture design and assessment system (ADAS) is being used to model the controller for a high-rate, high-capacity erasable spaceflight optical disk recorder (SODR). System structure and behavior are being designed, simulated, and evaluated. A general description of the SODR system and the ADAS simulation tool is presented and is followed by a discussion of the use of ADAS for SODR controller modeling to evaluate the proposed system architecture, functionality, and performance.<>
{"title":"Application of the architecture design and assessment system for the modeling of a spaceflight optical disk controller","authors":"G. Hines, J. Stoughton, T. Shull, L. Matthias","doi":"10.1109/SSST.1990.138174","DOIUrl":"https://doi.org/10.1109/SSST.1990.138174","url":null,"abstract":"The architecture design and assessment system (ADAS) is being used to model the controller for a high-rate, high-capacity erasable spaceflight optical disk recorder (SODR). System structure and behavior are being designed, simulated, and evaluated. A general description of the SODR system and the ADAS simulation tool is presented and is followed by a discussion of the use of ADAS for SODR controller modeling to evaluate the proposed system architecture, functionality, and performance.<<ETX>>","PeriodicalId":201543,"journal":{"name":"[1990] Proceedings. The Twenty-Second Southeastern Symposium on System Theory","volume":"309 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122315749","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 : 1990-03-11DOI: 10.1109/SSST.1990.138109
G. Cunningham, R.A. Smoak
Uncertainty exists concerning the defect size in ultrasonic NDE (nondestructive evaluation) data recorded by amplitude-based systems conducting a radial beam boresonic test on a steam turbine rotor. Five different approaches to modifying the EFBH (equivalent flat bottom hole diameter) values found in the raw data are investigated. Three conservative approaches are found to lead to reasonable results from the fracture mechanics analysis. A nonconservative treatment of the NDE data is found to lead to the prediction of immediate failures. Both deterministic and probabilistic fracture calculations are performed by EPRI-developed SAFER (stress and fracture evaluation of rotors) and PERL computer programs, respectively.<>
{"title":"The utilization of ultrasonic NDE data with the SAFER finite element based code for the estimation of remaining life of a steam turbine rotor","authors":"G. Cunningham, R.A. Smoak","doi":"10.1109/SSST.1990.138109","DOIUrl":"https://doi.org/10.1109/SSST.1990.138109","url":null,"abstract":"Uncertainty exists concerning the defect size in ultrasonic NDE (nondestructive evaluation) data recorded by amplitude-based systems conducting a radial beam boresonic test on a steam turbine rotor. Five different approaches to modifying the EFBH (equivalent flat bottom hole diameter) values found in the raw data are investigated. Three conservative approaches are found to lead to reasonable results from the fracture mechanics analysis. A nonconservative treatment of the NDE data is found to lead to the prediction of immediate failures. Both deterministic and probabilistic fracture calculations are performed by EPRI-developed SAFER (stress and fracture evaluation of rotors) and PERL computer programs, respectively.<<ETX>>","PeriodicalId":201543,"journal":{"name":"[1990] Proceedings. The Twenty-Second Southeastern Symposium on System Theory","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126154070","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 : 1990-03-11DOI: 10.1109/SSST.1990.138173
M.A. Belkerdid, P.G. Zablocky
CAD tools for designing interdigital surface-acoustic-wave (SAW) devices are presented. The software computes the exact spatial position of the metal interdigital electrodes for any given chirp specification. A linear FM up-chirp SAW device was designed with the CAD tools, with one dispersive and one wideband transducer (dual in-line geometry). The device was designed to produce a chirp pulse with a rectangular window envelope using four electrodes per period. A center frequency of 100 MHz, a bandwidth of 10 MHz, and a pulse duration of 2 mu s were used. An HP8753C automatic network analyzer was used to test the designed device.<>
{"title":"CAD tools for the design and analysis of surface acoustic wave chirp devices","authors":"M.A. Belkerdid, P.G. Zablocky","doi":"10.1109/SSST.1990.138173","DOIUrl":"https://doi.org/10.1109/SSST.1990.138173","url":null,"abstract":"CAD tools for designing interdigital surface-acoustic-wave (SAW) devices are presented. The software computes the exact spatial position of the metal interdigital electrodes for any given chirp specification. A linear FM up-chirp SAW device was designed with the CAD tools, with one dispersive and one wideband transducer (dual in-line geometry). The device was designed to produce a chirp pulse with a rectangular window envelope using four electrodes per period. A center frequency of 100 MHz, a bandwidth of 10 MHz, and a pulse duration of 2 mu s were used. An HP8753C automatic network analyzer was used to test the designed device.<<ETX>>","PeriodicalId":201543,"journal":{"name":"[1990] Proceedings. The Twenty-Second Southeastern Symposium on System Theory","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130243624","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 : 1990-03-11DOI: 10.1109/SSST.1990.138222
D. Gallaher, P. Srinivasan
A method for residue-number-system- (RNS-) to-weighted-binary-number system (-BNS) conversion for moduli of the form 2k-1, 2k, 2k+1 is presented. The conversion method, which is called the Srinivasan-Gallaher (SG) method, is an application of work by P. Srinivasan et al. on division by 2/sup n/-1 and 2/sup n/+1. Specifically, the method for computing remainders is reversed to provide a convenient digit-parallel RNS-to-binary conversion procedure. In comparison with other methods recently presented in the literature, this technique is faster and requires less area for implementation. After the SG method is described and proved, this and other conversion approaches are classified and compared.<>
{"title":"Digital-parallel residue-binary conversion","authors":"D. Gallaher, P. Srinivasan","doi":"10.1109/SSST.1990.138222","DOIUrl":"https://doi.org/10.1109/SSST.1990.138222","url":null,"abstract":"A method for residue-number-system- (RNS-) to-weighted-binary-number system (-BNS) conversion for moduli of the form 2k-1, 2k, 2k+1 is presented. The conversion method, which is called the Srinivasan-Gallaher (SG) method, is an application of work by P. Srinivasan et al. on division by 2/sup n/-1 and 2/sup n/+1. Specifically, the method for computing remainders is reversed to provide a convenient digit-parallel RNS-to-binary conversion procedure. In comparison with other methods recently presented in the literature, this technique is faster and requires less area for implementation. After the SG method is described and proved, this and other conversion approaches are classified and compared.<<ETX>>","PeriodicalId":201543,"journal":{"name":"[1990] Proceedings. The Twenty-Second Southeastern Symposium on System Theory","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127696464","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 : 1990-03-11DOI: 10.1109/SSST.1990.138211
R. Carpenter, J. G. Kelly, J. Tague, N. Haddad
Consideration is given to the performance analysis of optimal sonar classification. To perform active classification, a known waveform is transmitted into a medium and directed toward a region called the test volume. An array of N sensors is used to pick up the backscattered signal energy reflected from the M cells of the test volume, and the data are input into a processing algorithm. The processor is to decide if an object is present and, if so, what kind of object is present. An Eulerian model of each object is developed; that is, each object is characterized by the second-order statistical characteristics of its scattering coefficients. A systematic method for evaluating classifier performance is derived. A sensitivity analysis of processor performance is given and interpreted. An analysis of processor performance versus its angular resolution is described.<>
{"title":"Active sonar classification using Bayesian decision theory","authors":"R. Carpenter, J. G. Kelly, J. Tague, N. Haddad","doi":"10.1109/SSST.1990.138211","DOIUrl":"https://doi.org/10.1109/SSST.1990.138211","url":null,"abstract":"Consideration is given to the performance analysis of optimal sonar classification. To perform active classification, a known waveform is transmitted into a medium and directed toward a region called the test volume. An array of N sensors is used to pick up the backscattered signal energy reflected from the M cells of the test volume, and the data are input into a processing algorithm. The processor is to decide if an object is present and, if so, what kind of object is present. An Eulerian model of each object is developed; that is, each object is characterized by the second-order statistical characteristics of its scattering coefficients. A systematic method for evaluating classifier performance is derived. A sensitivity analysis of processor performance is given and interpreted. An analysis of processor performance versus its angular resolution is described.<<ETX>>","PeriodicalId":201543,"journal":{"name":"[1990] Proceedings. The Twenty-Second Southeastern Symposium on System Theory","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129693306","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 : 1990-03-11DOI: 10.1109/SSST.1990.138148
N. Bekhouche, A. Feliachi
A method for designing decentralized linear state estimators for large-scale systems is proposed. The system under consideration, called the global system, consists of a set of interconnected subsystems called local models. The coupling among the subsystems is described by an algebraic equation. The information about the system consists of noisy measurements taken at the subsystem level, called local measurements. Each local measurement comprises measurement on the local state vector and on the interaction variables. Decentralized estimators that minimize the performance index are sought. Decentralization is obtained from the fact that only local models and information are used in the design. The optimality conditions are derived through the connection structure, and the constraints that these conditions impose on either the connection variable measurements or the interaction equations are developed. The global state estimate of the overall state vector is obtained by stacking local state estimators.<>
{"title":"Decentralized estimators for interconnected systems using the interface information","authors":"N. Bekhouche, A. Feliachi","doi":"10.1109/SSST.1990.138148","DOIUrl":"https://doi.org/10.1109/SSST.1990.138148","url":null,"abstract":"A method for designing decentralized linear state estimators for large-scale systems is proposed. The system under consideration, called the global system, consists of a set of interconnected subsystems called local models. The coupling among the subsystems is described by an algebraic equation. The information about the system consists of noisy measurements taken at the subsystem level, called local measurements. Each local measurement comprises measurement on the local state vector and on the interaction variables. Decentralized estimators that minimize the performance index are sought. Decentralization is obtained from the fact that only local models and information are used in the design. The optimality conditions are derived through the connection structure, and the constraints that these conditions impose on either the connection variable measurements or the interaction equations are developed. The global state estimate of the overall state vector is obtained by stacking local state estimators.<<ETX>>","PeriodicalId":201543,"journal":{"name":"[1990] Proceedings. The Twenty-Second Southeastern Symposium on System Theory","volume":"453 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123042518","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 : 1990-03-11DOI: 10.1109/SSST.1990.138183
P. Li, R. S. Nutter
A system called the panel measurement and control device (PMCD) is discussed. The PMCD provides a remote control access to a residential electrical circuit breaker panel box. The PMCD communicates through two optical fiber cables. The executable commands include (1) turning a specified circuit breaker on or off, (2) measuring the current flowing through a specified circuit breaker, and (3) measuring the line voltages. There are 20 controllable breakers in the panel, which can be easily expanded to 40. Because of its compact design, the PMCD can be an ideal universal peripheral for home electrical energy management applications. The design problems discussed involve sensors, controllable breakers, and measurement algorithms, such as RMS-to-DC conversion, sampling control and drift compensation.<>
{"title":"The design of a microcontroller-based panel measurement and control system","authors":"P. Li, R. S. Nutter","doi":"10.1109/SSST.1990.138183","DOIUrl":"https://doi.org/10.1109/SSST.1990.138183","url":null,"abstract":"A system called the panel measurement and control device (PMCD) is discussed. The PMCD provides a remote control access to a residential electrical circuit breaker panel box. The PMCD communicates through two optical fiber cables. The executable commands include (1) turning a specified circuit breaker on or off, (2) measuring the current flowing through a specified circuit breaker, and (3) measuring the line voltages. There are 20 controllable breakers in the panel, which can be easily expanded to 40. Because of its compact design, the PMCD can be an ideal universal peripheral for home electrical energy management applications. The design problems discussed involve sensors, controllable breakers, and measurement algorithms, such as RMS-to-DC conversion, sampling control and drift compensation.<<ETX>>","PeriodicalId":201543,"journal":{"name":"[1990] Proceedings. The Twenty-Second Southeastern Symposium on System Theory","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130856859","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 : 1990-03-11DOI: 10.1109/SSST.1990.138113
B. Shahzadi
A special class of RLC networks, minimal series/parallel networks, which may be amenable to a systemic solution, is investigated. A minimal network is one containing the minimum number of capacitors and inductors and as many elements as there are independent coefficients in the impedance function. The prescribed driving-point function is resolved into component functions corresponding to the driving-point functions of the series or parallel subnetworks. The most straightforward case occurs when all the subnetworks are minimal, i.e., each component function is potentially realizable. In other cases in which some of the subnetworks are not minimal, different possibilities exist and require a thorough investigation.<>
{"title":"Synthesis of series/parallel RLC one-port networks","authors":"B. Shahzadi","doi":"10.1109/SSST.1990.138113","DOIUrl":"https://doi.org/10.1109/SSST.1990.138113","url":null,"abstract":"A special class of RLC networks, minimal series/parallel networks, which may be amenable to a systemic solution, is investigated. A minimal network is one containing the minimum number of capacitors and inductors and as many elements as there are independent coefficients in the impedance function. The prescribed driving-point function is resolved into component functions corresponding to the driving-point functions of the series or parallel subnetworks. The most straightforward case occurs when all the subnetworks are minimal, i.e., each component function is potentially realizable. In other cases in which some of the subnetworks are not minimal, different possibilities exist and require a thorough investigation.<<ETX>>","PeriodicalId":201543,"journal":{"name":"[1990] Proceedings. The Twenty-Second Southeastern Symposium on System Theory","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114119837","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 : 1990-03-11DOI: 10.1109/SSST.1990.138168
A. Divelbiss, M. E. Greene, A. Rich
The function and operation of the aspect sensor for the gamma ray imaging device (GRID) are presented. Each of the aspect sensor systems and how they work together to determine the pointing aspect of the GRID telescope are discussed. A description of the sun simulator used in laboratory testing is included, along with the methods for testing the aspect sensor in both the laboratory and in the full-scale GRID mock-up.<>
{"title":"An optical aspect sensor for the gamma ray imaging device","authors":"A. Divelbiss, M. E. Greene, A. Rich","doi":"10.1109/SSST.1990.138168","DOIUrl":"https://doi.org/10.1109/SSST.1990.138168","url":null,"abstract":"The function and operation of the aspect sensor for the gamma ray imaging device (GRID) are presented. Each of the aspect sensor systems and how they work together to determine the pointing aspect of the GRID telescope are discussed. A description of the sun simulator used in laboratory testing is included, along with the methods for testing the aspect sensor in both the laboratory and in the full-scale GRID mock-up.<<ETX>>","PeriodicalId":201543,"journal":{"name":"[1990] Proceedings. The Twenty-Second Southeastern Symposium on System Theory","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124292496","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 : 1990-03-11DOI: 10.1109/SSST.1990.138104
K. Ma, R.J. Jannorone, J. W. Gorman
A new feature selection approach is presented for using parallel distributed processing to identify a three-dimensional object from a two-dimensional image recorded at an arbitrary viewing angle and range. One vector of 32 feature variables is used to describe a two-dimensional binary image. The feature variables are based on counts of nearest neighbor conjuncts, which reflect shape and area differences among airplanes. Thirteen standardized airplanes are used in the experiment in order to compare the results with established feature selection approaches. Results based on the new approach compare favorably with results from traditional approaches. In addition, a relatively fast compact parallel hardware design and data structure are presented and compared with traditional algorithms.<>
{"title":"FAST: parallel airplane pattern recognition","authors":"K. Ma, R.J. Jannorone, J. W. Gorman","doi":"10.1109/SSST.1990.138104","DOIUrl":"https://doi.org/10.1109/SSST.1990.138104","url":null,"abstract":"A new feature selection approach is presented for using parallel distributed processing to identify a three-dimensional object from a two-dimensional image recorded at an arbitrary viewing angle and range. One vector of 32 feature variables is used to describe a two-dimensional binary image. The feature variables are based on counts of nearest neighbor conjuncts, which reflect shape and area differences among airplanes. Thirteen standardized airplanes are used in the experiment in order to compare the results with established feature selection approaches. Results based on the new approach compare favorably with results from traditional approaches. In addition, a relatively fast compact parallel hardware design and data structure are presented and compared with traditional algorithms.<<ETX>>","PeriodicalId":201543,"journal":{"name":"[1990] Proceedings. The Twenty-Second Southeastern Symposium on System Theory","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116620689","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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