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Proceedings. The First IEEE Regional Conference on Aerospace Control Systems,最新文献

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A Distributed Expert System for Stability Analysis 一种分布式稳定性分析专家系统
Proceedings. The First IEEE Regional Conference on Aerospace Control Systems, Pub Date : 1993-05-25 DOI: 10.1109/AEROCS.1993.721019
Huan-Wen Tzeng, Chin-Ming Hong, Chun Wen Liao, Weiguo Hao, Jiann-Liang Chen
{"title":"A Distributed Expert System for Stability Analysis","authors":"Huan-Wen Tzeng, Chin-Ming Hong, Chun Wen Liao, Weiguo Hao, Jiann-Liang Chen","doi":"10.1109/AEROCS.1993.721019","DOIUrl":"https://doi.org/10.1109/AEROCS.1993.721019","url":null,"abstract":"Based on distributed artificial intelligence technology, the paper proposes a distributed expert system for analyzing system stability. The developed expert system is a multi-agent system, each processing agent of which can compute autonomously and cooperate with other agents to reason an accurate and satisfactory solution for stability analysis. In addition, a two-level control mechanism composed of local-control and meta-control is also proposed to achieve a high degree of goodness in analyzing system stability in this issue. To demonstrate its effect, the distributed expert system has been tested of practical data. Test results indicate that the distributed expert system will be a valuable part of help desk to assist system analysts in making decision.","PeriodicalId":170527,"journal":{"name":"Proceedings. The First IEEE Regional Conference on Aerospace Control Systems,","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125071514","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: 1
Inverter Gain Compensation for Open Loop and Current Regulated Pwm Controllers 开环和电流调节Pwm控制器的逆变器增益补偿
Proceedings. The First IEEE Regional Conference on Aerospace Control Systems, Pub Date : 1993-05-25 DOI: 10.1109/AEROCS.1993.720935
R. Kerkman, D. Leggate, B. Seibel, T. Rowan
{"title":"Inverter Gain Compensation for Open Loop and Current Regulated Pwm Controllers","authors":"R. Kerkman, D. Leggate, B. Seibel, T. Rowan","doi":"10.1109/AEROCS.1993.720935","DOIUrl":"https://doi.org/10.1109/AEROCS.1993.720935","url":null,"abstract":"Pulse with modulated (PWM) inverters are examined in the pulse dropping region. Experimental results from commercially available ac drives show an inability to adequately compensate for low line conditions. The paper examines the adverse effects of bus disturbances on current regulated ac inverters. The paper shows that the problems are the result of the reduction in the gain of the PWM inverter. A compensated modulation technique is developed and is applied to the voltage and current regulated PWM inverters. Experimental results confirm the improved performance of the compensation technique.","PeriodicalId":170527,"journal":{"name":"Proceedings. The First IEEE Regional Conference on Aerospace Control Systems,","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121758433","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
Some Remarks on Wavelet Transforms 关于小波变换的几个注意事项
Proceedings. The First IEEE Regional Conference on Aerospace Control Systems, Pub Date : 1993-05-25 DOI: 10.1109/AEROCS.1993.720913
T. Bielecki, Jie Chen, E. B. Lin, S. Yau
{"title":"Some Remarks on Wavelet Transforms","authors":"T. Bielecki, Jie Chen, E. B. Lin, S. Yau","doi":"10.1109/AEROCS.1993.720913","DOIUrl":"https://doi.org/10.1109/AEROCS.1993.720913","url":null,"abstract":"Some fundamental and useful properties of Wavelet transforms are presented. A unified approach for both discrete and continuous time-frequency localization is introduced.","PeriodicalId":170527,"journal":{"name":"Proceedings. The First IEEE Regional Conference on Aerospace Control Systems,","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123859376","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
Performance Analysis for Recursive Passive Adaptive Controllers 递归无源自适应控制器的性能分析
Proceedings. The First IEEE Regional Conference on Aerospace Control Systems, Pub Date : 1993-05-25 DOI: 10.1109/AEROCS.1993.720924
M. Krstić, P. Kokotovic, I. Kanellakopoulos
{"title":"Performance Analysis for Recursive Passive Adaptive Controllers","authors":"M. Krstić, P. Kokotovic, I. Kanellakopoulos","doi":"10.1109/AEROCS.1993.720924","DOIUrl":"https://doi.org/10.1109/AEROCS.1993.720924","url":null,"abstract":"Computable /spl Lscr/sub 2// and /spl Lscr/sub /spl infin// performance bounds are derived for a recently proposed class of adaptive systems which show that, in addition to global stability and asymptotic tracking, a systematic improvement of transient performance can be achieved. The underlying linear nonadaptive controller is shown to possess a parametric robustness property, but for large parameter uncertainty it requires high gain. A comparison between the adaptive and the nonadaptive performance bounds demonstrates that adaptation improves the overall performance without the undesirable effects of high gain.","PeriodicalId":170527,"journal":{"name":"Proceedings. The First IEEE Regional Conference on Aerospace Control Systems,","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123951309","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
Robust Fixed Order Dynamic Compensation: a Differential Game Approach 鲁棒定阶动态补偿:微分对策方法
Proceedings. The First IEEE Regional Conference on Aerospace Control Systems, Pub Date : 1993-05-25 DOI: 10.1109/AEROCS.1993.720977
G.D. Swenduk, A. Calise
{"title":"Robust Fixed Order Dynamic Compensation: a Differential Game Approach","authors":"G.D. Swenduk, A. Calise","doi":"10.1109/AEROCS.1993.720977","DOIUrl":"https://doi.org/10.1109/AEROCS.1993.720977","url":null,"abstract":"H-infinity control theory has gained wide acceptance over the past 10 years as a valuable method of controller design. However, for most applications the solution results in a controller of higher dimension than that of the plant. As an alternative to controller order reduction, low order controllers can be designed by fixing the order of the controller apriori. Probably the most well-known approach to fixed order robust control is the optimal projection theory of Bernstein and Haddad. Unfortunately, the computational aspects of this approach are formidable. In this paper, a method is presented which allows the use of more standard numerical techniques. The robust control problem is formulated in the time domain as a differential game. Three coupled, first order necessary conditions are derived and a conjugate gradient algorithm is used to search for solutions. Two examples are used to test the approach: a simple, second order example and a 7th order problem describing the longitudinal dynamics of a fighter aircraft.","PeriodicalId":170527,"journal":{"name":"Proceedings. The First IEEE Regional Conference on Aerospace Control Systems,","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130138455","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: 16
Mimo Environmental Control for Fighter Cockpits 战斗机驾驶舱Mimo环境控制
Proceedings. The First IEEE Regional Conference on Aerospace Control Systems, Pub Date : 1993-05-25 DOI: 10.1109/AEROCS.1993.720975
Won-Zon Chen, I. H. Wong
{"title":"Mimo Environmental Control for Fighter Cockpits","authors":"Won-Zon Chen, I. H. Wong","doi":"10.1109/AEROCS.1993.720975","DOIUrl":"https://doi.org/10.1109/AEROCS.1993.720975","url":null,"abstract":"The demanding requirements of modern fighter aircraft have made the design of a robust, energy-efficient environmental control system (ECS) a major challenge for system designers. Problems associated with conventional design approaches include the lack of analytical models and the use of simplistic single-input single-output (SIS0) design methods for highly complex multivariable systems. This paper presents a design approach that uses the multi-input multi-output (MIMO) linear-quadratic regulator (LQR) method to design an optimal environmental control law for a representative fighter aircraft cockpit. Performance of the LQR control law is enhanced by including integral feedbacks to eliminate steady-state errors. A scheme to approximate the full-state feedback with an output feedback system is also illustrated.","PeriodicalId":170527,"journal":{"name":"Proceedings. The First IEEE Regional Conference on Aerospace Control Systems,","volume":"235 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128265757","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
Active Stabilization of Rotating Stall in Axial-Flow Gas Compressors 轴流气体压缩机旋转失速的主动稳定
Proceedings. The First IEEE Regional Conference on Aerospace Control Systems, Pub Date : 1993-05-25 DOI: 10.1109/AEROCS.1993.720984
H.O. Wang, R.A. Adomaitist, E. Abed
{"title":"Active Stabilization of Rotating Stall in Axial-Flow Gas Compressors","authors":"H.O. Wang, R.A. Adomaitist, E. Abed","doi":"10.1109/AEROCS.1993.720984","DOIUrl":"https://doi.org/10.1109/AEROCS.1993.720984","url":null,"abstract":"Active stabilization of stall instabilities in axial flow compressors is pursued using a combination of bifurcation analysis and nonlinear control. A low-order discretization model of a PDE compressor model is found to exhibit a stationary (pitchfork) bifurcation at the onset of stall. Using throttle opening as a control, analysis of the linearized system at stall shows that the critical mode (zero eigenvalue) is unaffected by linear feedback. Hence, nonlinear stabilization techniques are necessary. A quadratic feedback control law is proposed based on the lower-order model and is found to adequately serve the control purposes for both the lower order and higher order discretizations.","PeriodicalId":170527,"journal":{"name":"Proceedings. The First IEEE Regional Conference on Aerospace Control Systems,","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130540783","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: 8
GPS Navigation Requirements for Future Mobile Ground-Based Missile Systems 未来机动陆基导弹系统的GPS导航需求
Proceedings. The First IEEE Regional Conference on Aerospace Control Systems, Pub Date : 1993-05-25 DOI: 10.1109/AEROCS.1993.721037
G. Graham, A. Killen
{"title":"GPS Navigation Requirements for Future Mobile Ground-Based Missile Systems","authors":"G. Graham, A. Killen","doi":"10.1109/AEROCS.1993.721037","DOIUrl":"https://doi.org/10.1109/AEROCS.1993.721037","url":null,"abstract":"At any given time there are several different missile systems under development. Each of these systems requires a guidance/navigation system. In the past, this requirement has been met through the use of inertial sensors. To meet future system requirements, it is envisioned that it will be necessary to incorporate GPS receivers on the launchers and into the missiles. The size, weight, power, performance, number of channels, and cost of these GPS receivers are critical. This paper will outline capabilities needed in future GPS receivers in order to meet envisioned US Army missile system requirements.","PeriodicalId":170527,"journal":{"name":"Proceedings. The First IEEE Regional Conference on Aerospace Control Systems,","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131285958","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: 1
A Computer Algorithm to Estimate Stability Regions Iind to Place Bounds on Settling Times for Nonlinear Systems 一种估计非线性系统稳定区域及设定稳定时间边界的计算机算法
Proceedings. The First IEEE Regional Conference on Aerospace Control Systems, Pub Date : 1993-05-25 DOI: 10.1109/AEROCS.1993.720883
R. Hilton
{"title":"A Computer Algorithm to Estimate Stability Regions Iind to Place Bounds on Settling Times for Nonlinear Systems","authors":"R. Hilton","doi":"10.1109/AEROCS.1993.720883","DOIUrl":"https://doi.org/10.1109/AEROCS.1993.720883","url":null,"abstract":"This paper describes a computer algorithm which accepts nonlinear system differential equations and from them estimates the region of aymptotic stability as well as a set of upper and lower bounds for the amount of time a state may exist in each of a set of subregions. These results are produced by way of a Lyapunov function approximated as a numerical solution of Zubov's equation for the given system.","PeriodicalId":170527,"journal":{"name":"Proceedings. The First IEEE Regional Conference on Aerospace Control Systems,","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122394750","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
Application of GPS for Missile Post Flight Guidance Accuracy Analysis GPS在导弹飞后制导精度分析中的应用
Proceedings. The First IEEE Regional Conference on Aerospace Control Systems, Pub Date : 1993-05-25 DOI: 10.1109/AEROCS.1993.721039
J. Dougherty, H. El-Sherief, D. Simon
{"title":"Application of GPS for Missile Post Flight Guidance Accuracy Analysis","authors":"J. Dougherty, H. El-Sherief, D. Simon","doi":"10.1109/AEROCS.1993.721039","DOIUrl":"https://doi.org/10.1109/AEROCS.1993.721039","url":null,"abstract":"The high quality of a GPS-based trajectory reference makes it useful for evaluating the performance of a missile's Inertial Navigation System (INS) during a missile flight test. The complexity of the design of the GPS user segment depends on flight test objectives and factors such as the expected satellite/vehicle geometry. Design curves are developed which illustrate the relationship between flight test objectives, the GPS user segment design, and such factors as antenna performance.","PeriodicalId":170527,"journal":{"name":"Proceedings. The First IEEE Regional Conference on Aerospace Control Systems,","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1993-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121269058","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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