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[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory最新文献

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The recursive algorithm for the optimal static output feedback control problem of linear weakly coupled systems 线性弱耦合系统最优静态输出反馈控制问题的递归算法
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1989-07-01 DOI: 10.1080/00207178908953342
N. Harkara, D. Petkovski, Z. Gajic
{"title":"The recursive algorithm for the optimal static output feedback control problem of linear weakly coupled systems","authors":"N. Harkara, D. Petkovski, Z. Gajic","doi":"10.1080/00207178908953342","DOIUrl":"https://doi.org/10.1080/00207178908953342","url":null,"abstract":"A recursive algorithm is developed for solving the algebraic equations comprising the solution of the optimal static output feedback control problem of weakly coupled systems. The proposed algorithm is very efficient from the numerical point of view, since only low-order systems are involved in algebraic calculations and the required solution can be easily obtained up to an arbitrary order of accuracy, O( epsilon /sup 2k/), where epsilon is a small weak coupling parameter.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125841855","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}
引用次数: 15
Coded multiple chirp spread spectrum system and overlay service 编码多啁啾扩频系统和覆盖业务
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-11-28 DOI: 10.1109/GLOCOM.1988.25903
J. Kim, T. Pratt, T. Ha
{"title":"Coded multiple chirp spread spectrum system and overlay service","authors":"J. Kim, T. Pratt, T. Ha","doi":"10.1109/GLOCOM.1988.25903","DOIUrl":"https://doi.org/10.1109/GLOCOM.1988.25903","url":null,"abstract":"An asynchronous spread-spectrum system called coded multiple chirp is proposed, and the possible spread-spectrum overlay over an analog FM-TV is investigated by computer simulation. In the proposed system, multiple single-sloped up and down chirps are encoded by a PN code and decoded by deciphers (pulse compression filters) followed by a digital code correlator. Performance of the proposed system, expressed in probability of bit error and code miss probability, is similar to that of noncoherent FSK using codewords, if sufficient compression gain is used. In the overlay where chirp is used to overlay an FM-TV channel, two chirp signals with data rate up to 25 kb/s could be overlaid in a 36 MHz satellite transponder without significant mutual interference. Performance estimates for a VSAT earth station operating at C-band show that a 2.4 m antenna and 300 mW transmitter could send a 2.4 kb/s signal to a large central earth station over an occupied channel.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"147 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125715008","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}
引用次数: 2
Robust model-based controller synthesis for the SCOLE configuration 基于鲁棒模型的SCOLE配置控制器综合
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-10-01 DOI: 10.1109/SSST.1988.17128
E. Armstrong, S. Joshi, E. Stewart
{"title":"Robust model-based controller synthesis for the SCOLE configuration","authors":"E. Armstrong, S. Joshi, E. Stewart","doi":"10.1109/SSST.1988.17128","DOIUrl":"https://doi.org/10.1109/SSST.1988.17128","url":null,"abstract":"The design of a robust compensator is considered for the SCOLE (spacecraft control laboratory experiment) configuration using a frequency-response shaping technique based on the LQG/LTR (linear quadratic Gaussian/loop transfer recovery) algorithm. Results indicate that a tenth-order compensator can be used to meet stability-performance-robustness conditions for a 26th-order SCOLE model without destabilizing spillover effects. Since the SCOLE configuration is representative of many proposed spaceflight experiments, the results and design techniques used should be potentially applicable to a wide range of large-space-structure control problems.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130087826","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}
引用次数: 2
The implementation of a testable high performance display controller (diagnostic radiology equipment) 一种可测试的高性能显示控制器(放射诊断设备)的实现
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17119
J. Bou-Farhat, R. Makki, M. Allen, D. Anthony
{"title":"The implementation of a testable high performance display controller (diagnostic radiology equipment)","authors":"J. Bou-Farhat, R. Makki, M. Allen, D. Anthony","doi":"10.1109/SSST.1988.17119","DOIUrl":"https://doi.org/10.1109/SSST.1988.17119","url":null,"abstract":"A description is given of the testability features of a VLSI implementation of a high-performance display controller for diagnostic radiology. The design-for-test features cover 100% of the silicon area at a modest overhead. Boundary-scan, partitioning, and structured control sequencing are used to enhance the verifiability and testability of the IC.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115410591","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}
引用次数: 0
A least-squares technique for shape recognition with depth data 基于深度数据的形状识别的最小二乘技术
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17067
J. W. Gorman
{"title":"A least-squares technique for shape recognition with depth data","authors":"J. W. Gorman","doi":"10.1109/SSST.1988.17067","DOIUrl":"https://doi.org/10.1109/SSST.1988.17067","url":null,"abstract":"The use of spherical harmonic coefficients to describe objects represented by depth data is introduced. In a previous implementation, it was necessary to fit planar patches to the data before coefficient calculation, and numerical integration techniques were used in the computations. Here a least-squares implementation is presented that allows for coefficient calculation directly from the depth data without the use of planar patches or numerical integration. This technique is much faster, and experimental results are shown to demonstrate its effectiveness.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"78 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116076952","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}
引用次数: 0
Electromagnetic transients simulator for large-scale spacecraft power systems 大型航天器动力系统电磁瞬变模拟器
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17031
S. R. Newton, B. B. Reid, G. Sheblé, R. Nelms, L. Grigsby
{"title":"Electromagnetic transients simulator for large-scale spacecraft power systems","authors":"S. R. Newton, B. B. Reid, G. Sheblé, R. Nelms, L. Grigsby","doi":"10.1109/SSST.1988.17031","DOIUrl":"https://doi.org/10.1109/SSST.1988.17031","url":null,"abstract":"A transient simulator program is being developed for the design of adequate surge protection and insulation levels within a spacecraft power system. The program divides the transmission lines into a series of L-section segments. By using Kirchoff's voltage and current laws, a state variable model is derived to accurately simulate the travelling waves on each line. The state variables are chosen as the inductor current and the capacitor voltage of each L-section segment. The coefficient matrix that results is highly sparse. Finally, the state variable equations are solved using the trapezoidal method of numerical integration.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122140532","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}
引用次数: 4
A unified approach to transform domain LMS adaptive filtering 统一变换域LMS自适应滤波方法
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17088
F. Allen, M. Amin
{"title":"A unified approach to transform domain LMS adaptive filtering","authors":"F. Allen, M. Amin","doi":"10.1109/SSST.1988.17088","DOIUrl":"https://doi.org/10.1109/SSST.1988.17088","url":null,"abstract":"The authors present a generalized structure for a transform-domain least-mean-square (LMS) adaptive algorithm. In this structure, different transforms, including the Fourier transform, can be presented and used to improve both convergence and estimation over time-domain processing. The structure is general in the sense that it uses information in a successive time data blocks for each iteration in the transform domain. Further, it uses all values of the input transform to estimate each value of the desired transform. The generalized structure, therefore, accounts for nonGaussian processes as well as processes with slowly decaying correlation functions. Previously introduced structures, such as frequency-domain LMS, are special cases of the introduced structure and they result for specific time-varying environment. These can also be special cases obtained by setting some of the structure weights to zero values prior to processing. A mean-square error analysis is provided.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129787402","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}
引用次数: 0
Equivalence of control signals in nonlinear adaptive controllers and an 'all-linear' adaptive controller 非线性自适应控制器和“全线性”自适应控制器中控制信号的等价性
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17108
C.D. Johnson, J. You
{"title":"Equivalence of control signals in nonlinear adaptive controllers and an 'all-linear' adaptive controller","authors":"C.D. Johnson, J. You","doi":"10.1109/SSST.1988.17108","DOIUrl":"https://doi.org/10.1109/SSST.1988.17108","url":null,"abstract":"The authors design three different adaptive controllers for the same second-order plant example. Two of the controllers are contemporary nonlinear adaptive controllers designed by the methods of Narendra and Valavani (1978); and Morse (1987); the third controller is an all-linear, constant coefficient adaptive controller designed by Johnson's method (1985), which is based on disturbance-accommodating control (DAC) theory. Using computer simulation techniques, the authors demonstrate that the DAC all-linear adaptive controller produces control signals that are essentially equivalent to the control signals produced by the two nonlinear adaptive controllers. This equivalence is demonstrated over a range of uncertain plant parameter perturbations and external disturbances.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129197501","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}
引用次数: 7
Determination of optical wavefronts perturbed by random fluctuations of the index refraction 受折射率随机波动扰动的光波前的测定
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17046
A. Poularikas, C. Katsinis
{"title":"Determination of optical wavefronts perturbed by random fluctuations of the index refraction","authors":"A. Poularikas, C. Katsinis","doi":"10.1109/SSST.1988.17046","DOIUrl":"https://doi.org/10.1109/SSST.1988.17046","url":null,"abstract":"A method is presented by which the random amplitude and phase at any particular point of a wavefront may be determined. The only information needed is the electrical output of a detector the excitations of which is due to the integration of the incoming and a reference wave. The reference wave is the result of a point source.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"119 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123379067","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}
引用次数: 0
Study of power system harmonics in an unbalanced system using the three-phase bus impedance matrix 用三相母线阻抗矩阵研究不平衡系统中的电力系统谐波
[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory Pub Date : 1988-03-20 DOI: 10.1109/SSST.1988.17010
K. P. Thornton, E. Makram
{"title":"Study of power system harmonics in an unbalanced system using the three-phase bus impedance matrix","authors":"K. P. Thornton, E. Makram","doi":"10.1109/SSST.1988.17010","DOIUrl":"https://doi.org/10.1109/SSST.1988.17010","url":null,"abstract":"The authors study the effect of harmonic current injected at a certain bus on the voltages at the other buses using the three-phase bus impedance matrix of an unbalanced system at normal and abnormal conditions. The effects of the system capacitors (grounded or ungrounded) in the presence of harmonic distortion is also studied. The results show that for both normal and abnormal system conditions, the highest voltage variations occur when the system capacitors are disconnected. The best case (smallest voltage variation) occurs when the system capacitors are grounded. In the case of ungrounded capacitors, the voltage variation falls in between the other two cases. These conclusions apply to higher harmonic orders. It is also found that the buses closest to the source of injected harmonic current are subject to extremely high voltage variation.<<ETX>>","PeriodicalId":345412,"journal":{"name":"[1988] Proceedings. The Twentieth Southeastern Symposium on System Theory","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1988-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115811179","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}
引用次数: 3
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