Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165867
E. M. Sims, K. B. Donovan
It is noted that the specifics of visual systems, and related visionics systems, is one of the most difficult aspects of flight trainer procurement. The common goal for the services and industry is to establish specification terms which ensure the most cost-effective training systems. There has been a shift in specifications from terms of graphics primitives, such as polygons and lights, to terms of training cues, such as terrain fidelity. The authors describe the impact of this new specification method for three key areas of visionics system performance: terrain fidelity, feature fidelity, and system resolution.<>
{"title":"Specifying performance for a new generation of visionics simulators","authors":"E. M. Sims, K. B. Donovan","doi":"10.1109/NAECON.1991.165867","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165867","url":null,"abstract":"It is noted that the specifics of visual systems, and related visionics systems, is one of the most difficult aspects of flight trainer procurement. The common goal for the services and industry is to establish specification terms which ensure the most cost-effective training systems. There has been a shift in specifications from terms of graphics primitives, such as polygons and lights, to terms of training cues, such as terrain fidelity. The authors describe the impact of this new specification method for three key areas of visionics system performance: terrain fidelity, feature fidelity, and system resolution.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127781248","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165912
L.E. Greene
The author discusses specific LCC (life cycle cost) milestones and activities which program managers should address to effectively apply LCC management techniques to their programs. The focus is more on the timing side of LCC management rather than on the how to do it side of the problem. The LCC milestones discussed are necessarily generic ones since it is not possible to discuss them in terms of just one specific program. However, with the help of a statement of program objectives and a master program schedule which shows the program phases, these generic LCC milestones can be easily tailored and adapted to a specific program.<>
{"title":"Life cycle cost (LCC) milestones","authors":"L.E. Greene","doi":"10.1109/NAECON.1991.165912","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165912","url":null,"abstract":"The author discusses specific LCC (life cycle cost) milestones and activities which program managers should address to effectively apply LCC management techniques to their programs. The focus is more on the timing side of LCC management rather than on the how to do it side of the problem. The LCC milestones discussed are necessarily generic ones since it is not possible to discuss them in terms of just one specific program. However, with the help of a statement of program objectives and a master program schedule which shows the program phases, these generic LCC milestones can be easily tailored and adapted to a specific program.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"11 6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125942037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165746
R. Stevens
The SAE Linear Implementation Task Group has developed the SAE Linear Token Passing Multiplex Data Bus Standard (AS4074.1). A validation plan which will define the test requirements for determining that an implementation of the standard meets the requirements of SAE AS4074.1 is discussed. Once completed, the test requirements contained in this plan will be executed on bus interface units (BIUs) for validation purposes. The author describes the use of a validation model that incorporates many of the capabilities of the validation test plan. This model can also be thought of as a VHDL (VHSIC Hardware Description Language) behavioral representation of the SAE Linear Token Passing Multiplex Data Bus Standard. It is tightly coupled to the standard and provides a model that can be used during the BIU development to validate the design.<>
{"title":"High speed data bus design validation","authors":"R. Stevens","doi":"10.1109/NAECON.1991.165746","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165746","url":null,"abstract":"The SAE Linear Implementation Task Group has developed the SAE Linear Token Passing Multiplex Data Bus Standard (AS4074.1). A validation plan which will define the test requirements for determining that an implementation of the standard meets the requirements of SAE AS4074.1 is discussed. Once completed, the test requirements contained in this plan will be executed on bus interface units (BIUs) for validation purposes. The author describes the use of a validation model that incorporates many of the capabilities of the validation test plan. This model can also be thought of as a VHDL (VHSIC Hardware Description Language) behavioral representation of the SAE Linear Token Passing Multiplex Data Bus Standard. It is tightly coupled to the standard and provides a model that can be used during the BIU development to validate the design.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"39 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125742467","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165728
R.E. Sommer, M. A. Mehalic
The authors deal with the development of a Winograd Fourier transform processor at the Air Force Institute of Technology (AFIT). The processor can be hardware-configured to perform a 15-, 16-, 17-, 240-, 255-, 272-, or 4,080-point transform. The authors present three methods that can be used to improve the utility of the AFIT WFTA processor. Dynamic reconfiguration, a two-dimensional transform system, and an alternate architecture for the AFIT WFTA are presented. Results of these improvements are given, including a four-dimensional FFT (fast Fourier transform) configuration that can perform a single 77520-point complex FFT in 8.87 milliseconds, and once the processor's pipeline is full, a 77520-point complex transform can be completed every 2.22 milliseconds.<>
{"title":"Design enhancements for the Air Force Institute of Technology's Winograd Fourier transform processor","authors":"R.E. Sommer, M. A. Mehalic","doi":"10.1109/NAECON.1991.165728","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165728","url":null,"abstract":"The authors deal with the development of a Winograd Fourier transform processor at the Air Force Institute of Technology (AFIT). The processor can be hardware-configured to perform a 15-, 16-, 17-, 240-, 255-, 272-, or 4,080-point transform. The authors present three methods that can be used to improve the utility of the AFIT WFTA processor. Dynamic reconfiguration, a two-dimensional transform system, and an alternate architecture for the AFIT WFTA are presented. Results of these improvements are given, including a four-dimensional FFT (fast Fourier transform) configuration that can perform a single 77520-point complex FFT in 8.87 milliseconds, and once the processor's pipeline is full, a 77520-point complex transform can be completed every 2.22 milliseconds.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125775604","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165937
G.F. McDougal, M. Cooper, D. Folds
It is suggested that the Air Force (AF) Electronic Combat (EC) Test Process for RF receiver systems can be realized via application of the scientific method employed by experimental scientists for centuries. The authors delineate the direct correspondence of the scientific method to the disciplined AF EC Test Process for RF receiver systems. A by-product of this examination is the identification of the pitfalls which have historically plagued EC system test and evaluation. Particular emphasis is placed on the roles of computer modeling and simulation to implement key steps in the scientific method relative to hypothesis formulation, prediction validation, experiment correlation, and the generalization of these results to operational performance estimates. Mathematical formulations are presented to accomplish the mapping of RF receiver test objective specific performance characteristics to operationally relevant performance measures.<>
{"title":"AF EC test process for RF receivers","authors":"G.F. McDougal, M. Cooper, D. Folds","doi":"10.1109/NAECON.1991.165937","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165937","url":null,"abstract":"It is suggested that the Air Force (AF) Electronic Combat (EC) Test Process for RF receiver systems can be realized via application of the scientific method employed by experimental scientists for centuries. The authors delineate the direct correspondence of the scientific method to the disciplined AF EC Test Process for RF receiver systems. A by-product of this examination is the identification of the pitfalls which have historically plagued EC system test and evaluation. Particular emphasis is placed on the roles of computer modeling and simulation to implement key steps in the scientific method relative to hypothesis formulation, prediction validation, experiment correlation, and the generalization of these results to operational performance estimates. Mathematical formulations are presented to accomplish the mapping of RF receiver test objective specific performance characteristics to operationally relevant performance measures.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"46 46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122951893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165804
D. Wheaton, I. Horowitz, C. Houpis
The application of non-minimum phase omega '-plane discrete MIMO (multiple-input-multiple-output) quantitative feedback theory (QFT) to the design of a three-axis rate-commanded automatic flight control system for a URV is presented. The URV model used is a seven-input three-output state-space system derived from the small-angle perturbation equations of motion. The controllers and prefilters designed provide a three-axis noninteracting rate-commanded automatic flight control law implementation on the Lambda URV. Hybrid nonlinear simulations verify the successful application of discrete QFT. The yaw-rate channel meets all specifications.<>
{"title":"Robust discrete controller design for an unmanned research vehicle (URV) using discrete quantitative feedback theory","authors":"D. Wheaton, I. Horowitz, C. Houpis","doi":"10.1109/NAECON.1991.165804","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165804","url":null,"abstract":"The application of non-minimum phase omega '-plane discrete MIMO (multiple-input-multiple-output) quantitative feedback theory (QFT) to the design of a three-axis rate-commanded automatic flight control system for a URV is presented. The URV model used is a seven-input three-output state-space system derived from the small-angle perturbation equations of motion. The controllers and prefilters designed provide a three-axis noninteracting rate-commanded automatic flight control law implementation on the Lambda URV. Hybrid nonlinear simulations verify the successful application of discrete QFT. The yaw-rate channel meets all specifications.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130068404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165782
L. Hong
An optimal reduced-order filter is developed which can provide a full vector of state estimates for the case where the dimension of the measurement vector is smaller than that of the state vector and no measurements are noise-free. The reduced-order filter consists of an observer type subfilter and a complementary subfilter, each of which provides a subset of the optimal estimate. A two-step L-K transformation is employed to minimize the estimate error covariance of each subfilter. A target tracking problem is studied as an example.<>
{"title":"Optimal reduced-order filtering","authors":"L. Hong","doi":"10.1109/NAECON.1991.165782","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165782","url":null,"abstract":"An optimal reduced-order filter is developed which can provide a full vector of state estimates for the case where the dimension of the measurement vector is smaller than that of the state vector and no measurements are noise-free. The reduced-order filter consists of an observer type subfilter and a complementary subfilter, each of which provides a subset of the optimal estimate. A two-step L-K transformation is employed to minimize the estimate error covariance of each subfilter. A target tracking problem is studied as an example.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129331569","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165820
B. Hall
A description is given of SPIL (system, process, I/O, logic), a graphical software design notation developed by the authors for use on avionics projects and intended to be used to describe software design. Some of the elements which it incorporates in user-friendly diagrams are: design from the viewpoint of the process; logic and control at the module/process level; data structures and data flow; and hierarchical diagram structures with decomposition analogous to that provided by the Structured Analysis and Design Technique (SADT).<>
{"title":"SPIL: a new graphical design notation","authors":"B. Hall","doi":"10.1109/NAECON.1991.165820","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165820","url":null,"abstract":"A description is given of SPIL (system, process, I/O, logic), a graphical software design notation developed by the authors for use on avionics projects and intended to be used to describe software design. Some of the elements which it incorporates in user-friendly diagrams are: design from the viewpoint of the process; logic and control at the module/process level; data structures and data flow; and hierarchical diagram structures with decomposition analogous to that provided by the Structured Analysis and Design Technique (SADT).<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"108 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117288992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165920
R. R. Hill
The author summarizes research results of a research effort in decision support system (DSS) technology for ULCE (Unified Life Cycle Engineering). Among the topics addressed were ULCE architectural issues, design measurement and methods research, ULCE-related design technique survey papers, and investigations into group support system technology. The technical papers produced influenced concurrent engineering efforts. The end result of this summary effort is to encapsulate the four-year research effort into a set of generalized findings and recommendations. Since the ULCE research program was a precursor to the current initiative in concurrent engineering (CE), or integrated product development (IPD), this set of findings and recommendations are discussed particularly with respect to an effort called the Requirements Analysis Process In Design (RAPID) program.<>
{"title":"Engineering research technology for concurrent engineering from unified life cycle engineering","authors":"R. R. Hill","doi":"10.1109/NAECON.1991.165920","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165920","url":null,"abstract":"The author summarizes research results of a research effort in decision support system (DSS) technology for ULCE (Unified Life Cycle Engineering). Among the topics addressed were ULCE architectural issues, design measurement and methods research, ULCE-related design technique survey papers, and investigations into group support system technology. The technical papers produced influenced concurrent engineering efforts. The end result of this summary effort is to encapsulate the four-year research effort into a set of generalized findings and recommendations. Since the ULCE research program was a precursor to the current initiative in concurrent engineering (CE), or integrated product development (IPD), this set of findings and recommendations are discussed particularly with respect to an effort called the Requirements Analysis Process In Design (RAPID) program.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116252730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1991-05-20DOI: 10.1109/NAECON.1991.165843
D. E. Snyder, M. McNeese, B. S. Zaff
The authors present some of the analytical and design foundations for an integrated analysis structure for knowledge acquisition and design Concept maps, IDEF (integrated computer-aided manufacturing definition), and storyboards are combined into an integrated structure for knowledge representation, called cognitive maps, and a hypermedia-based analytical framework is established using graphical spreadsheets. The authors describe the preliminary results of a project to define this hypermedia environment and integrated software.<>
{"title":"Identifying design requirements using integrated analysis structures","authors":"D. E. Snyder, M. McNeese, B. S. Zaff","doi":"10.1109/NAECON.1991.165843","DOIUrl":"https://doi.org/10.1109/NAECON.1991.165843","url":null,"abstract":"The authors present some of the analytical and design foundations for an integrated analysis structure for knowledge acquisition and design Concept maps, IDEF (integrated computer-aided manufacturing definition), and storyboards are combined into an integrated structure for knowledge representation, called cognitive maps, and a hypermedia-based analytical framework is established using graphical spreadsheets. The authors describe the preliminary results of a project to define this hypermedia environment and integrated software.<<ETX>>","PeriodicalId":247766,"journal":{"name":"Proceedings of the IEEE 1991 National Aerospace and Electronics Conference NAECON 1991","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1991-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126628858","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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