Pub Date : 2006-05-08DOI: 10.1109/ISSCAA.2006.1627506
J. Qiu, Shu Lin, Ying Suo, Q. You
The Luneburg lens antenna consists of a Luneburg lens with convergent function of electromagnetic wave and a horn feed. The nonuniform medium ball simulation and the distance between the feed and the lens have great influence on the focus character of this antenna. The layer spherical shells are used to simulate Luneburg lens and the guide port is used to be the feed. It is simulated with the application of CST MIROWAVE STUDIOreg software and the paper analyze the influence of the distance between the feed and the lens on the focus character of a Luneburg lens antenna
{"title":"The simulation of the focus character of a Luneburg lens antenna","authors":"J. Qiu, Shu Lin, Ying Suo, Q. You","doi":"10.1109/ISSCAA.2006.1627506","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627506","url":null,"abstract":"The Luneburg lens antenna consists of a Luneburg lens with convergent function of electromagnetic wave and a horn feed. The nonuniform medium ball simulation and the distance between the feed and the lens have great influence on the focus character of this antenna. The layer spherical shells are used to simulate Luneburg lens and the guide port is used to be the feed. It is simulated with the application of CST MIROWAVE STUDIOreg software and the paper analyze the influence of the distance between the feed and the lens on the focus character of a Luneburg lens antenna","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129315173","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 : 2006-05-08DOI: 10.1109/ISSCAA.2006.1627445
Yingxin Yan, G. Duan
This paper considers the robust control of a four degree of magnetic bearing system. Rotors with gyroscopic effects are being modeled as linear systems with structure uncertainties, while the speed disturbance of the magnetic bearing system can be treated as structure uncertainties. A simple output feedback controller is proposed for minimizing eigenvalue sensitivities based on complete parametric eigenstructure assignments. The basic idea is to minimize the eigenvalue sensitivities using the design freedom provided by eigenstructure assignments. Besides the design parameters, the eigenvalues of closed-loop system are also optimized within desired regions. The optimizing results demonstrate the effects of the approach
{"title":"Robust control of magnetic bearing with gyroscopic effects using output feedback controller","authors":"Yingxin Yan, G. Duan","doi":"10.1109/ISSCAA.2006.1627445","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627445","url":null,"abstract":"This paper considers the robust control of a four degree of magnetic bearing system. Rotors with gyroscopic effects are being modeled as linear systems with structure uncertainties, while the speed disturbance of the magnetic bearing system can be treated as structure uncertainties. A simple output feedback controller is proposed for minimizing eigenvalue sensitivities based on complete parametric eigenstructure assignments. The basic idea is to minimize the eigenvalue sensitivities using the design freedom provided by eigenstructure assignments. Besides the design parameters, the eigenvalues of closed-loop system are also optimized within desired regions. The optimizing results demonstrate the effects of the approach","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127310017","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 : 2006-05-08DOI: 10.1109/ISSCAA.2006.1627427
Qi Wang, Kejie Zhang, You-yi Jiang, Xianze Xiong
Log-polar transformation (LPT) is a primary model of the space-variant vision theory. In the paper, in order to acquire images of mapping transformation matrix, the distance transformation and angle transformation of LPT are researched respectively. The implementation of the discrete algorithm of LPT is explored in details, pointing out that there is a one-to-one mapping ring in the transformation of distance axis and angle axis. Meanwhile, a new transformation algorithm based on the united one-to-one mapping ring is put forward. In addition, the algorithm of the reverse transformation of LPT is also presented and researched. At the same time some practical applications are given
{"title":"The discrete algorithm of log-polar transformation","authors":"Qi Wang, Kejie Zhang, You-yi Jiang, Xianze Xiong","doi":"10.1109/ISSCAA.2006.1627427","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627427","url":null,"abstract":"Log-polar transformation (LPT) is a primary model of the space-variant vision theory. In the paper, in order to acquire images of mapping transformation matrix, the distance transformation and angle transformation of LPT are researched respectively. The implementation of the discrete algorithm of LPT is explored in details, pointing out that there is a one-to-one mapping ring in the transformation of distance axis and angle axis. Meanwhile, a new transformation algorithm based on the united one-to-one mapping ring is put forward. In addition, the algorithm of the reverse transformation of LPT is also presented and researched. At the same time some practical applications are given","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129181687","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 : 2006-05-08DOI: 10.1109/ISSCAA.2006.1627486
Jie Sun, Yang Zhao, Zhao-wei Sun, Nan An
Micro-core is one general module of satellite, and its function density is very high. A new idea and a new concept are adopted to design micro-core. Aiming at attitude determination system (ADS) of micro-core, this paper adopts an optimization design method to determine parameters of sensors. In aspect of selecting sensors of attitude determine system, the optimization method adopted in this paper is greatly different from traditional methods, and realization of this method has important effects on design of micro-core and even on micro-satellite in the future. This paper selects both ADS based on star sensor and fiber-optic gyroscope (FOG) combination and ADS only based on star sensor as ADS of micro-core, and adopts extended Kalman filter (EKF) to estimate attitudes. This paper sets up optimization model of ADS, and adopts optimization method to determine parameters of star-sensor and FOG, and then optimization results are achieved, and finally are validated. By analyzing results, the optimization method is proved to be feasible and valid
{"title":"Optimization of parameters of attitude determination system of micro-core","authors":"Jie Sun, Yang Zhao, Zhao-wei Sun, Nan An","doi":"10.1109/ISSCAA.2006.1627486","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627486","url":null,"abstract":"Micro-core is one general module of satellite, and its function density is very high. A new idea and a new concept are adopted to design micro-core. Aiming at attitude determination system (ADS) of micro-core, this paper adopts an optimization design method to determine parameters of sensors. In aspect of selecting sensors of attitude determine system, the optimization method adopted in this paper is greatly different from traditional methods, and realization of this method has important effects on design of micro-core and even on micro-satellite in the future. This paper selects both ADS based on star sensor and fiber-optic gyroscope (FOG) combination and ADS only based on star sensor as ADS of micro-core, and adopts extended Kalman filter (EKF) to estimate attitudes. This paper sets up optimization model of ADS, and adopts optimization method to determine parameters of star-sensor and FOG, and then optimization results are achieved, and finally are validated. By analyzing results, the optimization method is proved to be feasible and valid","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127799999","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 : 2006-05-08DOI: 10.1109/ISSCAA.2006.1627683
Kezhao Li, Jianping Yuan, Xiaokui Yue, Qun Fang
In this paper a novel algorithm is proposed for the spacecraft detection and relative navigation problems. The main contents of this algorithm are studied as following: (i) detection algorithm by using mathematical morphology (MM). In spacecraft detection and information extraction by using MM transformation, how to design a reasonable structuring element according to the shape of spacecraft entities and its transformation information is very important, (ii) relative navigation algorithm based-on conformal geometric algebra (CGA). CGA allows to higher order entities (lines, planes, circles, spheres) in the same manner as with points. It is a novel way to deal with 2D-3D pose estimation problem. The description of spacecraft entities and its transformation based-on CGA will be studied, (iii) combining detection with relative navigation organically. Using the theory of spacecraft dynamics and spacecraft entities transformation information, we provide a new thought to construct and reconstruct dynamically structuring elements. The reasonable decomposition of structuring element for spacecraft features detection and providing the spacecraft entities transformation information based-on CGA theory can assure relative navigation to be combined with detection organically
{"title":"A novel algorithm of detection and relative navigation for spacecraft","authors":"Kezhao Li, Jianping Yuan, Xiaokui Yue, Qun Fang","doi":"10.1109/ISSCAA.2006.1627683","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627683","url":null,"abstract":"In this paper a novel algorithm is proposed for the spacecraft detection and relative navigation problems. The main contents of this algorithm are studied as following: (i) detection algorithm by using mathematical morphology (MM). In spacecraft detection and information extraction by using MM transformation, how to design a reasonable structuring element according to the shape of spacecraft entities and its transformation information is very important, (ii) relative navigation algorithm based-on conformal geometric algebra (CGA). CGA allows to higher order entities (lines, planes, circles, spheres) in the same manner as with points. It is a novel way to deal with 2D-3D pose estimation problem. The description of spacecraft entities and its transformation based-on CGA will be studied, (iii) combining detection with relative navigation organically. Using the theory of spacecraft dynamics and spacecraft entities transformation information, we provide a new thought to construct and reconstruct dynamically structuring elements. The reasonable decomposition of structuring element for spacecraft features detection and providing the spacecraft entities transformation information based-on CGA theory can assure relative navigation to be combined with detection organically","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129087567","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 : 2006-05-08DOI: 10.1109/ISSCAA.2006.1627594
Guoqiang Wu, Zhao-wei Sun, D. Zhao, Weiqing Zhang
In this paper, every composing of MicroSim is introduced, and the work theory of each composing is also introduced. One of the executive machines of MicroSim (reaction wheels) is used to realize the damping mode of micro-satellite. The task of the damping mode is to stop the rotational motion of the microsatellite in each of the three axes. And the simulation result is given under the damping control mode
{"title":"Simulation research of damping control based on MicroSim system","authors":"Guoqiang Wu, Zhao-wei Sun, D. Zhao, Weiqing Zhang","doi":"10.1109/ISSCAA.2006.1627594","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627594","url":null,"abstract":"In this paper, every composing of MicroSim is introduced, and the work theory of each composing is also introduced. One of the executive machines of MicroSim (reaction wheels) is used to realize the damping mode of micro-satellite. The task of the damping mode is to stop the rotational motion of the microsatellite in each of the three axes. And the simulation result is given under the damping control mode","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117125078","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 : 2006-05-08DOI: 10.1109/ISSCAA.2006.1627531
Li Yang, Qingling Zhang, Zhanzhi Qiu, Guo-Yi Liu
The time-delay dependent robust dissipative control problem for a class of time-delay systems with nonlinear perturbations is discussed. Firstly we establish the time-delay robust dissipative criterion for the systems by the matrix inequalities, and point out the bound of the time-delay. Then we get the time-delay dependent robust dissipative memoryless state feedback controller and time-delay state feedback controller. At last we testify the feasibility of the theorems by the numerical examples
{"title":"Time-delay dependent robust dissipative control for a class of nonlinear time-delay systems","authors":"Li Yang, Qingling Zhang, Zhanzhi Qiu, Guo-Yi Liu","doi":"10.1109/ISSCAA.2006.1627531","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627531","url":null,"abstract":"The time-delay dependent robust dissipative control problem for a class of time-delay systems with nonlinear perturbations is discussed. Firstly we establish the time-delay robust dissipative criterion for the systems by the matrix inequalities, and point out the bound of the time-delay. Then we get the time-delay dependent robust dissipative memoryless state feedback controller and time-delay state feedback controller. At last we testify the feasibility of the theorems by the numerical examples","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"106 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116096927","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 : 2006-05-08DOI: 10.1109/ISSCAA.2006.1627613
Xiaodong Cai, Peijian Ye
This paper constructs a template for description of global image feature by integrating matching methods of grayscale and geometry feature, selecting feature point set depending on partial texture energy distribution and utilizing geometrical constraints among points. The matching between real-time image and reference image is realized through stepwise refinement method. The first step is a coarse search by feature point set matching. Fine registrations include cluster analysis and close object matching. Compared with traditional image matching algorithm, feature point set algorithm can improve matching speed and closed object matching can meet the precision requirement. Its practicability has been proved by simulated experiments
{"title":"Feature point set image matching algorithm for satellite attitude determination","authors":"Xiaodong Cai, Peijian Ye","doi":"10.1109/ISSCAA.2006.1627613","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627613","url":null,"abstract":"This paper constructs a template for description of global image feature by integrating matching methods of grayscale and geometry feature, selecting feature point set depending on partial texture energy distribution and utilizing geometrical constraints among points. The matching between real-time image and reference image is realized through stepwise refinement method. The first step is a coarse search by feature point set matching. Fine registrations include cluster analysis and close object matching. Compared with traditional image matching algorithm, feature point set algorithm can improve matching speed and closed object matching can meet the precision requirement. Its practicability has been proved by simulated experiments","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116195234","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 : 2006-05-08DOI: 10.1109/ISSCAA.2006.1627420
Feng Wang, Xibin Cao, Xueqin Chen, Dai Gao
Servicer is required to fast attitude capture after capturing/releasing target. Considering the variable model and nonzero initial angular rate, the paper presents a model independent control law to realize the attitude capture by a move-to-rest eigenaxis rotation. The law adopts the attitude information and the deviation information of eigenaxis to enable the servicer to perform attitude capture rapidly within constraints of slew rate and control torque by the cascade-saturation control logic. Finally, a simulation is also illustrated, and the results prove that the law has validity and reliability
{"title":"Near eigenaxis maneuver for on-orbit-servicing spacecraft","authors":"Feng Wang, Xibin Cao, Xueqin Chen, Dai Gao","doi":"10.1109/ISSCAA.2006.1627420","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627420","url":null,"abstract":"Servicer is required to fast attitude capture after capturing/releasing target. Considering the variable model and nonzero initial angular rate, the paper presents a model independent control law to realize the attitude capture by a move-to-rest eigenaxis rotation. The law adopts the attitude information and the deviation information of eigenaxis to enable the servicer to perform attitude capture rapidly within constraints of slew rate and control torque by the cascade-saturation control logic. Finally, a simulation is also illustrated, and the results prove that the law has validity and reliability","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114758005","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 : 2006-05-08DOI: 10.1109/ISSCAA.2006.1627454
Shuiwang Yang, Zhilu Wu, Guanghui Ren
FSK (frequency-shift keying) IF (intermediate frequency) digital receiver based on FPGA (field programmable gate array) technique is studied. With compared to fixed analog circuits, FPGA can offer more system flexibility, programmability than fixed analog systems. Bandpass sampling, DDC and CORDIC digital phase discrimination techniques are adopted, which are implemented in FPGA. Its performance is investigated over practical signal. The experiments results show that the performance of it is almost same as that of optimal noncoherent receiver. The highlight is that the receiver proposed can offer more system flexibility, programmability than fixed analog systems
{"title":"Design and implementation of FPGA-based FSK IF digital receiver","authors":"Shuiwang Yang, Zhilu Wu, Guanghui Ren","doi":"10.1109/ISSCAA.2006.1627454","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627454","url":null,"abstract":"FSK (frequency-shift keying) IF (intermediate frequency) digital receiver based on FPGA (field programmable gate array) technique is studied. With compared to fixed analog circuits, FPGA can offer more system flexibility, programmability than fixed analog systems. Bandpass sampling, DDC and CORDIC digital phase discrimination techniques are adopted, which are implemented in FPGA. Its performance is investigated over practical signal. The experiments results show that the performance of it is almost same as that of optimal noncoherent receiver. The highlight is that the receiver proposed can offer more system flexibility, programmability than fixed analog systems","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"2013 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114637539","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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