Pub Date : 1994-05-23DOI: 10.1109/NAECON.1994.332842
C. Martin
This paper describes the benefits of a new process for performing cockpit design by tracing a sample problem to its resolution through the application of the process and its accompanying toolset. The activities performed and the toolset selected illustrate the enormous potential of this evolving technology in future cockpit design and development. The Human Systems Center's Armstrong Laboratory initiated the Crew-Centered Cockpit Design (CCCD) Program in the mid-1980's in response to a need for a formal, structured process to improve the design, analysis, and testing of cockpit designs. Veda Incorporated is working with the CCCD Program Office to provide an enhanced and validated Crew-Centered System Design Process (CSDP) and a Cockpit Design System (CDS) toolset to meet this need. This paper presents the concept of use for the CSDP and CDS toolset that is currently being applied in a series of field demonstrations to a variety of cockpit designs and upgrades. The sample problem presented in this paper was actually performed in 1993; however, many of the capabilities of the CSDP and the CDS that are described are still in development. The concurrent application of the evolving process and toolset in real-world applications is facilitating the verification of the end products of the program. This article is written from the perspective of the analyst/designer assigned to use the process and toolset to solve a typical problem and to demonstrate the utility of the CSDP and the CDS toolset.<>
{"title":"Application of a crew-centered cockpit design process and toolset","authors":"C. Martin","doi":"10.1109/NAECON.1994.332842","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332842","url":null,"abstract":"This paper describes the benefits of a new process for performing cockpit design by tracing a sample problem to its resolution through the application of the process and its accompanying toolset. The activities performed and the toolset selected illustrate the enormous potential of this evolving technology in future cockpit design and development. The Human Systems Center's Armstrong Laboratory initiated the Crew-Centered Cockpit Design (CCCD) Program in the mid-1980's in response to a need for a formal, structured process to improve the design, analysis, and testing of cockpit designs. Veda Incorporated is working with the CCCD Program Office to provide an enhanced and validated Crew-Centered System Design Process (CSDP) and a Cockpit Design System (CDS) toolset to meet this need. This paper presents the concept of use for the CSDP and CDS toolset that is currently being applied in a series of field demonstrations to a variety of cockpit designs and upgrades. The sample problem presented in this paper was actually performed in 1993; however, many of the capabilities of the CSDP and the CDS that are described are still in development. The concurrent application of the evolving process and toolset in real-world applications is facilitating the verification of the end products of the program. This article is written from the perspective of the analyst/designer assigned to use the process and toolset to solve a typical problem and to demonstrate the utility of the CSDP and the CDS toolset.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123330152","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332926
H. Weidong, Yu Wenxian, Guo Guirong
Because of the statistical nature nature of many types of clutter, a radar target detector must set a fairly high threshold in order to order to maintain a reasonable false-alarm rate. However, weak targets are usually missed for the above threshold detector. This paper presents an effective detector, which can be considered as a two-dimensional feature matching filter for radar signals. The feature extraction is performed by Hopfield neural networks and the feature integration is finished by a multilayer perceptron. In order to overcome the local optimum problem, a novel modification which is called energy comparing method is introduced into the Hopfield model dynamic equation to find the global optimum. By testing with the real radar return data in a low signal-to-clutter ratio, the detector presented in this paper has more advantages than the conventional threshold detector.<>
{"title":"The neural network method for radar weak target detection","authors":"H. Weidong, Yu Wenxian, Guo Guirong","doi":"10.1109/NAECON.1994.332926","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332926","url":null,"abstract":"Because of the statistical nature nature of many types of clutter, a radar target detector must set a fairly high threshold in order to order to maintain a reasonable false-alarm rate. However, weak targets are usually missed for the above threshold detector. This paper presents an effective detector, which can be considered as a two-dimensional feature matching filter for radar signals. The feature extraction is performed by Hopfield neural networks and the feature integration is finished by a multilayer perceptron. In order to overcome the local optimum problem, a novel modification which is called energy comparing method is introduced into the Hopfield model dynamic equation to find the global optimum. By testing with the real radar return data in a low signal-to-clutter ratio, the detector presented in this paper has more advantages than the conventional threshold detector.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"PP 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126529324","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332931
M. Garrambone, J. Chrissis, B. Morlan
This paper contains a mathematical analysis of a theater conflict wargame and describes the framework for assessing the impact of force structure by viewing the construction of a computer model which mirrors the combat attrition processes. The paper describes the Markovian model used to verify and validated the results of simulated force combat by deriving combat transition probabilities, and defines, analyzes, and tests a series of various player strategies. We examine offensive and defensive approaches to determine the optimal player decision processes derived from Markovian analysis. The analysis is further supported by combat simulation along with graphical explanations. The objective remains that of testing combat strategies given alternatives presented under various playing conditions.<>
{"title":"Combat modeling in the \"risk\" environment","authors":"M. Garrambone, J. Chrissis, B. Morlan","doi":"10.1109/NAECON.1994.332931","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332931","url":null,"abstract":"This paper contains a mathematical analysis of a theater conflict wargame and describes the framework for assessing the impact of force structure by viewing the construction of a computer model which mirrors the combat attrition processes. The paper describes the Markovian model used to verify and validated the results of simulated force combat by deriving combat transition probabilities, and defines, analyzes, and tests a series of various player strategies. We examine offensive and defensive approaches to determine the optimal player decision processes derived from Markovian analysis. The analysis is further supported by combat simulation along with graphical explanations. The objective remains that of testing combat strategies given alternatives presented under various playing conditions.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121412168","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 : 1994-05-23DOI: 10.1109/NAECON.1994.333022
Xingbin Gao, Yongtan Liu
An ISAR object recognition system has been described. The feature extraction of ISAR object images is achieved by two-dimensional FFT processing,and a square window which is located on the center of the spectrum is used for feature selection, and the classifier of the system is a nearest neighbor classifier. Through experiments on ISAR object recognition, the effect of the feature window length on the system recognition rate has been investigated. The experimental results show that the feature selection window with the low-pass form is the optimum feature selection approach, and an optimum feature window length is existing for this feature selection method, which can be determined by training sample set itself.<>
{"title":"Feature extraction and feature selection of microwave scattering images","authors":"Xingbin Gao, Yongtan Liu","doi":"10.1109/NAECON.1994.333022","DOIUrl":"https://doi.org/10.1109/NAECON.1994.333022","url":null,"abstract":"An ISAR object recognition system has been described. The feature extraction of ISAR object images is achieved by two-dimensional FFT processing,and a square window which is located on the center of the spectrum is used for feature selection, and the classifier of the system is a nearest neighbor classifier. Through experiments on ISAR object recognition, the effect of the feature window length on the system recognition rate has been investigated. The experimental results show that the feature selection window with the low-pass form is the optimum feature selection approach, and an optimum feature window length is existing for this feature selection method, which can be determined by training sample set itself.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122569114","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332954
A. C. Johndro, D. Ferens
Active consideration of software support during acquisition, or development, is tantamount to successful software support. A key objective of the Air Force's new Integrated Weapon System Management (IWSM) philosophy is to ensure software supportability by making the same organization responsible for both software development and software support. A thesis effort performed at the Air Force Institute of Technology (AFIT) in 1993 assessed whether IWSM could meet this objective and what practices would result in improved software supportability. A literature review and survey of several programs designated as IWSM pilot programs concluded that the IWSM concept is indeed superior for software supportability, and that several practices used by the organizations surveyed can enhance supportability. Furthermore, the surveys and literature review suggested several additional practices that can further enhance the effectiveness of IWSM. A product of the AFIT study is a set of guidelines for ensuring supportability of software for IWSM systems. Although these guidelines were written specifically for IWSM, they will help all software managers more effectively consider software support during acquisition.<>
{"title":"Ensuring software supportability during acquisition: an Air Force case study","authors":"A. C. Johndro, D. Ferens","doi":"10.1109/NAECON.1994.332954","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332954","url":null,"abstract":"Active consideration of software support during acquisition, or development, is tantamount to successful software support. A key objective of the Air Force's new Integrated Weapon System Management (IWSM) philosophy is to ensure software supportability by making the same organization responsible for both software development and software support. A thesis effort performed at the Air Force Institute of Technology (AFIT) in 1993 assessed whether IWSM could meet this objective and what practices would result in improved software supportability. A literature review and survey of several programs designated as IWSM pilot programs concluded that the IWSM concept is indeed superior for software supportability, and that several practices used by the organizations surveyed can enhance supportability. Furthermore, the surveys and literature review suggested several additional practices that can further enhance the effectiveness of IWSM. A product of the AFIT study is a set of guidelines for ensuring supportability of software for IWSM systems. Although these guidelines were written specifically for IWSM, they will help all software managers more effectively consider software support during acquisition.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123816628","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332891
G. Go, J.W. Ianniello
The Federal Aviation Administration under the National Airspace System Plan is modernizing its airport radar for surface surveillance. Part of this modernization program includes the installation of the third generation of Airport Surface Detection Equipment known as ASDE-3. This major advancement over existing equipment uses modern radar technology to provide ground controllers with a crisp, clutter free display of surface targets, even under conditions of severely limited airport visibility. Modern digital technology provides advanced viewing capabilities. These include airport map overlays and operator selectable window insets on each display. The windows can be rotated and magnified. These features allow critical areas to be viewed clearly, providing valuable assistance to ground traffic controllers. The high quality of the processed radar returns is being used to extend the function of ASDE-3 to further aid the ground controllers and enhance airport safety. Information from sensors monitoring approaching aircraft has been combined with ASDE-3 to provide automatic runway incursion warnings. This paper describes the design and implementation of ASDE-3. Methods are proposed to expand ASDE-3 to support the next generation of automatic traffic monitoring systems.<>
{"title":"Third generation airport surface detection equipment design","authors":"G. Go, J.W. Ianniello","doi":"10.1109/NAECON.1994.332891","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332891","url":null,"abstract":"The Federal Aviation Administration under the National Airspace System Plan is modernizing its airport radar for surface surveillance. Part of this modernization program includes the installation of the third generation of Airport Surface Detection Equipment known as ASDE-3. This major advancement over existing equipment uses modern radar technology to provide ground controllers with a crisp, clutter free display of surface targets, even under conditions of severely limited airport visibility. Modern digital technology provides advanced viewing capabilities. These include airport map overlays and operator selectable window insets on each display. The windows can be rotated and magnified. These features allow critical areas to be viewed clearly, providing valuable assistance to ground traffic controllers. The high quality of the processed radar returns is being used to extend the function of ASDE-3 to further aid the ground controllers and enhance airport safety. Information from sensors monitoring approaching aircraft has been combined with ASDE-3 to provide automatic runway incursion warnings. This paper describes the design and implementation of ASDE-3. Methods are proposed to expand ASDE-3 to support the next generation of automatic traffic monitoring systems.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127563797","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 : 1994-05-23DOI: 10.1109/NAECON.1994.333003
V.L. Koliadin
An approach to the vector of states estimation for systems where the measurement operator is not of full rank is proposed. The approach is an alternative to traditional Kalman filtering. A distinctive feature is that it needs less a priori statistical information and leads to wider spectrum of possible estimators. A central idea, which stems from the regularization theory, is to use a stabilizing functional to provide a unique solution.<>
{"title":"Use of incomplete GPS data for navigation","authors":"V.L. Koliadin","doi":"10.1109/NAECON.1994.333003","DOIUrl":"https://doi.org/10.1109/NAECON.1994.333003","url":null,"abstract":"An approach to the vector of states estimation for systems where the measurement operator is not of full rank is proposed. The approach is an alternative to traditional Kalman filtering. A distinctive feature is that it needs less a priori statistical information and leads to wider spectrum of possible estimators. A central idea, which stems from the regularization theory, is to use a stabilizing functional to provide a unique solution.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131268441","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332847
S. Sheldon, S. Rasmussen
This paper is a discussion of the development and successful flight test of a flight control system designed using techniques of Quantitative Feedback Theory. The flight control system was designed for and flew on the Lambda Unmanned Research Vehicle. Lambda is a remotely piloted aircraft with a wingspan of 14 feet. It is operated by Wright Laboratory for research in flight control technology. The developmental process began with the use of Digital Datcom, a computer program which predicts stability and control derivatives for aerospace vehicles based upon geometric data. Datcom information formed the baseline model of the aircraft. This baseline model was refined by using system identification software to estimate the aerodynamic derivatives from actual flight test data. Maximum likelihood identification was used to identify the natural frequency and damping ratios of the short period and roll modes. This information combined with the Datcom information provided a working model for the flight control system design. Much of the preliminary QFT design work was accomplished at the Air Force institute of Technology. During the same period, a nonlinear simulation was developed at Wright Laboratory. This simulation incorporated a six degree of freedom simulation, and automatic trim calculation, air vehicle kinematics, control surface saturation, and sensor noise recorded from the Lambda on-board control system. When placed in this simulation, the original control system exhibited undesirable behavior. The controller was then adjusted prior to implementation. By this time, a new computer aided design program was developed by AFIT for designing Quantitative Feedback Theory control systems. This program allowed for a rapid redesign, which resulted in the successful flight test control system that flew on 20 November 1992.<>
{"title":"Development and first successful flight test of a QFT flight control system","authors":"S. Sheldon, S. Rasmussen","doi":"10.1109/NAECON.1994.332847","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332847","url":null,"abstract":"This paper is a discussion of the development and successful flight test of a flight control system designed using techniques of Quantitative Feedback Theory. The flight control system was designed for and flew on the Lambda Unmanned Research Vehicle. Lambda is a remotely piloted aircraft with a wingspan of 14 feet. It is operated by Wright Laboratory for research in flight control technology. The developmental process began with the use of Digital Datcom, a computer program which predicts stability and control derivatives for aerospace vehicles based upon geometric data. Datcom information formed the baseline model of the aircraft. This baseline model was refined by using system identification software to estimate the aerodynamic derivatives from actual flight test data. Maximum likelihood identification was used to identify the natural frequency and damping ratios of the short period and roll modes. This information combined with the Datcom information provided a working model for the flight control system design. Much of the preliminary QFT design work was accomplished at the Air Force institute of Technology. During the same period, a nonlinear simulation was developed at Wright Laboratory. This simulation incorporated a six degree of freedom simulation, and automatic trim calculation, air vehicle kinematics, control surface saturation, and sensor noise recorded from the Lambda on-board control system. When placed in this simulation, the original control system exhibited undesirable behavior. The controller was then adjusted prior to implementation. By this time, a new computer aided design program was developed by AFIT for designing Quantitative Feedback Theory control systems. This program allowed for a rapid redesign, which resulted in the successful flight test control system that flew on 20 November 1992.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121861376","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 : 1994-05-23DOI: 10.1109/NAECON.1994.333006
Wei-ping Yang, Zhen-Kang Shen, Zhi-yong Li
This paper deals with the detection of dim point targets in infrared images. Dim point targets detection is always a difficulty in information processing. Researchers have proposed many effective methods; this paper introduces a new method. Whereas difference method has obtained good result in one dimensional signal processing, this paper manages to apply it to two dimensional signal processing, that is to say, dim point targets detection in infrared images of low SNR. The image background is color noise, and its column correlation is strong. So, ordinary methods probably lose the true targets because of the strong color noise, but unlike them, difference method can overcome this shortcoming, it can eliminate correlation noise and enhance useful information, finally pick out the probable targets from noise background. In the paper, the method was given a more extensive account. In order to improve the detection effect, we utilize prefilter. The prefilter is realized by the alpha filter. Because the same targets have same location in more than three frames, using alpha filter can utilize the information of adjacent frames, increase the SNR of the raw data and reduce the noise of the images.<>
{"title":"The application of difference method to dim point target detection in infrared images","authors":"Wei-ping Yang, Zhen-Kang Shen, Zhi-yong Li","doi":"10.1109/NAECON.1994.333006","DOIUrl":"https://doi.org/10.1109/NAECON.1994.333006","url":null,"abstract":"This paper deals with the detection of dim point targets in infrared images. Dim point targets detection is always a difficulty in information processing. Researchers have proposed many effective methods; this paper introduces a new method. Whereas difference method has obtained good result in one dimensional signal processing, this paper manages to apply it to two dimensional signal processing, that is to say, dim point targets detection in infrared images of low SNR. The image background is color noise, and its column correlation is strong. So, ordinary methods probably lose the true targets because of the strong color noise, but unlike them, difference method can overcome this shortcoming, it can eliminate correlation noise and enhance useful information, finally pick out the probable targets from noise background. In the paper, the method was given a more extensive account. In order to improve the detection effect, we utilize prefilter. The prefilter is realized by the alpha filter. Because the same targets have same location in more than three frames, using alpha filter can utilize the information of adjacent frames, increase the SNR of the raw data and reduce the noise of the images.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"32 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114126351","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 : 1994-05-23DOI: 10.1109/NAECON.1994.332856
B. Porter, D. Hicks
The dynamical characteristics of high-performance fighter aircraft vary considerably over typical operational flight envelopes, and digital model-following flight-control systems for such aircraft must accordingly be robust. However, the linearised dynamics of such aircraft are usually modelled as partially irregular plants, i.e. plants having rank-defective first Markov parameters for which no robustness results are currently available in the case of fast-sampling digital PID controllers. Genetic algorithms can, however, be used to tune such PID controllers so as to robustify them over entire flight envelopes. This use of genetic algorithms is illustrated by the design of a robustified digital model-following flight-control system for an open-loop unstable F-16 aircraft operating over a flight envelope involving three different flight conditions.<>
{"title":"Genetic robustification of digital model-following flight-control systems","authors":"B. Porter, D. Hicks","doi":"10.1109/NAECON.1994.332856","DOIUrl":"https://doi.org/10.1109/NAECON.1994.332856","url":null,"abstract":"The dynamical characteristics of high-performance fighter aircraft vary considerably over typical operational flight envelopes, and digital model-following flight-control systems for such aircraft must accordingly be robust. However, the linearised dynamics of such aircraft are usually modelled as partially irregular plants, i.e. plants having rank-defective first Markov parameters for which no robustness results are currently available in the case of fast-sampling digital PID controllers. Genetic algorithms can, however, be used to tune such PID controllers so as to robustify them over entire flight envelopes. This use of genetic algorithms is illustrated by the design of a robustified digital model-following flight-control system for an open-loop unstable F-16 aircraft operating over a flight envelope involving three different flight conditions.<<ETX>>","PeriodicalId":281754,"journal":{"name":"Proceedings of National Aerospace and Electronics Conference (NAECON'94)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1994-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117327401","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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