Pub Date : 2006-10-23DOI: 10.1109/WCICA.2006.1712662
Huan Qi, Shuang Xia, Yingchun Chen, Jianmin Dai
With the characteristic of active positioning, the Beidou double-star navigation and positioning system is not appropriate for military applications. In order to overcome the shortcomings, a new passive positioning algorithm is proposed. According to the data collected from the two synchronous satellites, as well as atomic clock and altitude gauge carried by a user, passive positioning is achieved through grid search algorithm. Simulation results of the algorithm show that the method is fast and accuracy enough for real-time positioning. It provides a new practical algorithm to improve the Beidou double-star positioning system
{"title":"Passive positioning algorithm based on Beidou double-star","authors":"Huan Qi, Shuang Xia, Yingchun Chen, Jianmin Dai","doi":"10.1109/WCICA.2006.1712662","DOIUrl":"https://doi.org/10.1109/WCICA.2006.1712662","url":null,"abstract":"With the characteristic of active positioning, the Beidou double-star navigation and positioning system is not appropriate for military applications. In order to overcome the shortcomings, a new passive positioning algorithm is proposed. According to the data collected from the two synchronous satellites, as well as atomic clock and altitude gauge carried by a user, passive positioning is achieved through grid search algorithm. Simulation results of the algorithm show that the method is fast and accuracy enough for real-time positioning. It provides a new practical algorithm to improve the Beidou double-star positioning system","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134078893","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.2006.1627646
Hui Li, Xuemai Gu
Polar and quasi-polar orbit constellations have "seams" between counter-rotated orbits, and ISLs need switch off above the polar regions. Satellite communication networks made up of Walker constellations have steady topology and good ISL performance. Adaptive routing strategy uses path-weight instead of delay or delay jitter as a criterion to select a path under three service models. Numerical results show the change of path weight and weight jitter under uniform model, and delay and delay jitter under discrepant model. Statistical model is a more exact model to describe the distribution of subscribers and the traffic flow from the source to the destination. The optimized path picked by adaptive routing may be longer than the shortest path picked by shortest path routing, but obviously adaptive routing stabilizes the network, and minimizes the network blocking probability and has smaller normalized occupied channels. The two non-GEO systems orbit on different altitude and have different QoS
{"title":"Adaptive ATM routing in Walker delta satellite communication networks","authors":"Hui Li, Xuemai Gu","doi":"10.1109/ISSCAA.2006.1627646","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627646","url":null,"abstract":"Polar and quasi-polar orbit constellations have \"seams\" between counter-rotated orbits, and ISLs need switch off above the polar regions. Satellite communication networks made up of Walker constellations have steady topology and good ISL performance. Adaptive routing strategy uses path-weight instead of delay or delay jitter as a criterion to select a path under three service models. Numerical results show the change of path weight and weight jitter under uniform model, and delay and delay jitter under discrepant model. Statistical model is a more exact model to describe the distribution of subscribers and the traffic flow from the source to the destination. The optimized path picked by adaptive routing may be longer than the shortest path picked by shortest path routing, but obviously adaptive routing stabilizes the network, and minimizes the network blocking probability and has smaller normalized occupied channels. The two non-GEO systems orbit on different altitude and have different QoS","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"18 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":"115157726","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.2006.1627708
Ling Zhang, Dequn Zhou, Peifeng Zhu, Hongwei Li
In the framework of MAUT (multi-attribute utility theory) > several methods have been proposed to aggregate utility of attributes and represent a decision makers (DM) utility function. Most of them are additive ones and they hypotheses that the decision attributes are independent of each other. But those additive methods can't guarantee to find a utility function which is coherent with the available information since they do not allow including additional information such as an interaction among criteria. Then the utility function expressed in terms of fuzzy measure and Choquet integral was proposed, which permits to model preference structures whose attributes are interdependence. In the literature, the properties of the Choquet integral will be concluded firstly; the conclusion that the Choquet integral suits the requirement of the aggregation in the MAUT will be drawn; then the compassion of the non-additive utility functions in the framework of the Choquet integral and the utility axioms which advanced by Von Neumann and Morgenstern will be analyzed; and at last the reason why utility functions expressed in terms of Choquet integral can consistent with the utility axioms will be given
{"title":"Comparison analysis of MAUT expressed in terms of Choquet integral and utility axioms","authors":"Ling Zhang, Dequn Zhou, Peifeng Zhu, Hongwei Li","doi":"10.1109/ISSCAA.2006.1627708","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627708","url":null,"abstract":"In the framework of MAUT (multi-attribute utility theory) > several methods have been proposed to aggregate utility of attributes and represent a decision makers (DM) utility function. Most of them are additive ones and they hypotheses that the decision attributes are independent of each other. But those additive methods can't guarantee to find a utility function which is coherent with the available information since they do not allow including additional information such as an interaction among criteria. Then the utility function expressed in terms of fuzzy measure and Choquet integral was proposed, which permits to model preference structures whose attributes are interdependence. In the literature, the properties of the Choquet integral will be concluded firstly; the conclusion that the Choquet integral suits the requirement of the aggregation in the MAUT will be drawn; then the compassion of the non-additive utility functions in the framework of the Choquet integral and the utility axioms which advanced by Von Neumann and Morgenstern will be analyzed; and at last the reason why utility functions expressed in terms of Choquet integral can consistent with the utility axioms will be given","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"15 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":"117200248","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.2006.1627521
B. Duan, Ying Luo
In this paper, a new kind of optimal design model and methodology for large flexible antenna in space with deployed and retracted states are investigated. The purpose is to search for a minimum weight design by means of selecting the cables' tension and cross-sectional areas of the surround truss whilst satisfying the constraints such as, for deployed state, the precision of reflector surface, material strength, eigenfrequency and variables sides, and, for retracted state, the stowage volume, eigenfrequency, material strength and variables sides. To solve the problem, an improved genetic algorithm (GAs) is proposed and applied to a 17-m-diameter antenna with reasonable result, which is currently under design and manufacturing in China
{"title":"On optimization of large cable mesh surface antenna with both deployed and retracted states","authors":"B. Duan, Ying Luo","doi":"10.1109/ISSCAA.2006.1627521","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627521","url":null,"abstract":"In this paper, a new kind of optimal design model and methodology for large flexible antenna in space with deployed and retracted states are investigated. The purpose is to search for a minimum weight design by means of selecting the cables' tension and cross-sectional areas of the surround truss whilst satisfying the constraints such as, for deployed state, the precision of reflector surface, material strength, eigenfrequency and variables sides, and, for retracted state, the stowage volume, eigenfrequency, material strength and variables sides. To solve the problem, an improved genetic algorithm (GAs) is proposed and applied to a 17-m-diameter antenna with reasonable result, which is currently under design and manufacturing in China","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"16 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":"121237964","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.2006.1627598
S. Shi, Xiaohui Gao, Zongwu Xie, F. Ni, Hong Liu, E. Kraemer, G. Hirzinger, S. Shi
This paper presents a reconfigurable modular space robot arm including reconfigurable modular mechanics, electronics, and control software. This robot was composed of six same modular joints and one gripper. A configuration similar to PUMA robot was adopted, which made it possible to fold the robot a compact shape, and save space and cost for transporting it into the space. A big central hole in the modular joint was designed for the placement of the cables and plugs in the robot arm, which prevented them from damage of high temperature, radiation in the space environment and the motion of the robot. Joint torque sensor, joint position sensor and temperature sensors etc. were integrated into the fully modular multi-sensor joint, which made the joint more intelligent. A zero gravity experimental system was developed to verify the functions of the robot under zero gravity environment
{"title":"Development of reconfigurable space robot arm","authors":"S. Shi, Xiaohui Gao, Zongwu Xie, F. Ni, Hong Liu, E. Kraemer, G. Hirzinger, S. Shi","doi":"10.1109/ISSCAA.2006.1627598","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627598","url":null,"abstract":"This paper presents a reconfigurable modular space robot arm including reconfigurable modular mechanics, electronics, and control software. This robot was composed of six same modular joints and one gripper. A configuration similar to PUMA robot was adopted, which made it possible to fold the robot a compact shape, and save space and cost for transporting it into the space. A big central hole in the modular joint was designed for the placement of the cables and plugs in the robot arm, which prevented them from damage of high temperature, radiation in the space environment and the motion of the robot. Joint torque sensor, joint position sensor and temperature sensors etc. were integrated into the fully modular multi-sensor joint, which made the joint more intelligent. A zero gravity experimental system was developed to verify the functions of the robot under zero gravity environment","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"30 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":"126831750","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.2006.1627698
Li He, Yihua Hu
The centroid coordinates of the sun image on the APS is required to be worked out in APS-based digital sun sensors. The usual `centroid' algorithm wastes time, especially when the area of the sun image is far smaller than the APS's. A new and faster method is offered to calculate the centroid of the sun image. The merit of the new algorithm is that it can improve the speed of the calculation and ensure the demand of precision
{"title":"A fast algorithm of attitude measurement for APS-based digital sun sensors","authors":"Li He, Yihua Hu","doi":"10.1109/ISSCAA.2006.1627698","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627698","url":null,"abstract":"The centroid coordinates of the sun image on the APS is required to be worked out in APS-based digital sun sensors. The usual `centroid' algorithm wastes time, especially when the area of the sun image is far smaller than the APS's. A new and faster method is offered to calculate the centroid of the sun image. The merit of the new algorithm is that it can improve the speed of the calculation and ensure the demand of precision","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"18 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":"126858249","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.2006.1627696
Wen Ye, Dengwu Ma, Hong-da Fan
Path planning is an important problem in space robot control. The self-adaptive ant colony algorithm is a new class of population basic algorithm. In this paper, obstacle avoidance path planning for space robot is realized by use of the self-adaptive ant colony algorithm. Based on the traditional ant colony algorithm, measures of keeping optimization, adaptively selecting and adaptively adjusting are applied, which can find better path at higher convergence speed. Simulation results using Matlab toolbox show that the method is effective and feasible
{"title":"Path planning for space robot based on the self-adaptive ant colony algorithm","authors":"Wen Ye, Dengwu Ma, Hong-da Fan","doi":"10.1109/ISSCAA.2006.1627696","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627696","url":null,"abstract":"Path planning is an important problem in space robot control. The self-adaptive ant colony algorithm is a new class of population basic algorithm. In this paper, obstacle avoidance path planning for space robot is realized by use of the self-adaptive ant colony algorithm. Based on the traditional ant colony algorithm, measures of keeping optimization, adaptively selecting and adaptively adjusting are applied, which can find better path at higher convergence speed. Simulation results using Matlab toolbox show that the method is effective and feasible","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"30 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":"116030038","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.2006.1627615
Xuemei Ding, Wenjing Kang, Jiwen Cui, L. Ao
Analysis of aerial images has been an important research topic for urban analysis. The classification and measurement for geometrical objects of a city will be simplified if its road network could be automatically extracted from aerial images. In this paper we present an automatic method to extract road network from high-resolution aerial images. These roads are found through the use of a consecutive linear features detection algorithm that is mainly based on the three following steps: first, pre-processing, a local selective window method followed by median filter are combined to remove noise and possibly irrelevant small scale details; which is followed by a cross entropy segmentation algorithm in variable overlapping window according to some rules, thus generating a binary edge map; in order to detect straight lines, a Hough transform is applied to the binary edge map to get the parameters of candidate lines. The experiment shows that the proposed method can be used to correctly extract road network from aerial images
{"title":"Automatic extraction of road network from aerial images","authors":"Xuemei Ding, Wenjing Kang, Jiwen Cui, L. Ao","doi":"10.1109/ISSCAA.2006.1627615","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627615","url":null,"abstract":"Analysis of aerial images has been an important research topic for urban analysis. The classification and measurement for geometrical objects of a city will be simplified if its road network could be automatically extracted from aerial images. In this paper we present an automatic method to extract road network from high-resolution aerial images. These roads are found through the use of a consecutive linear features detection algorithm that is mainly based on the three following steps: first, pre-processing, a local selective window method followed by median filter are combined to remove noise and possibly irrelevant small scale details; which is followed by a cross entropy segmentation algorithm in variable overlapping window according to some rules, thus generating a binary edge map; in order to detect straight lines, a Hough transform is applied to the binary edge map to get the parameters of candidate lines. The experiment shows that the proposed method can be used to correctly extract road network from aerial images","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"47 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":"122979132","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.2006.1627684
Yanling Hao, Z. Xiong, Baiya Xiong
Estimation errors of the transfer alignment of the inertial navigation system (INS) are presented in two cases, which are stationary state and constant velocity maneuver. The analyzed state variables include misalignment and inertial sensor errors. The INS transfer alignment model uses the velocity matching algorithm in this paper. In order to simplify the deduction process, the velocity matching model is obtained by utilizing the virtual variables to replace the parameters of the master inertial navigation system (MINS) except for the corrected velocity information from the MINS. So it is similar to the common in-motion alignment model. Then, the observability of the transfer alignment is analyzed. There are at least 3 unobservable states at rest or during the constant velocity motion. The conclusion is obtained, that the estimation errors are not fixed, but changed with the sensed specific force and angular rate during the constant velocity motion
{"title":"Estimation error of INS transfer alignment through observability analysis","authors":"Yanling Hao, Z. Xiong, Baiya Xiong","doi":"10.1109/ISSCAA.2006.1627684","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627684","url":null,"abstract":"Estimation errors of the transfer alignment of the inertial navigation system (INS) are presented in two cases, which are stationary state and constant velocity maneuver. The analyzed state variables include misalignment and inertial sensor errors. The INS transfer alignment model uses the velocity matching algorithm in this paper. In order to simplify the deduction process, the velocity matching model is obtained by utilizing the virtual variables to replace the parameters of the master inertial navigation system (MINS) except for the corrected velocity information from the MINS. So it is similar to the common in-motion alignment model. Then, the observability of the transfer alignment is analyzed. There are at least 3 unobservable states at rest or during the constant velocity motion. The conclusion is obtained, that the estimation errors are not fixed, but changed with the sensed specific force and angular rate during the constant velocity motion","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"152 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2006-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114049612","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.2006.1627410
N. Qi, Jian Hou, Hong Zhang
The goal of designing stereo matching algorithms for lunar rover navigation on natural terrain is to produce disparity maps with both denseness and accuracy. We present a multi-stage matching algorithm in which matching results of points with larger gradient in earlier stages are used to assist in matching of points with smaller gradient in later stages for the purpose of improving matching accuracy in regions lacking texture. Two new constraints together with other constraints and statistical means are employed to achieve this matching strategy. The effectiveness of the algorithm is verified by experiments with real images of natural terrain in various conditions
{"title":"A stereo matching algorithm for lunar rover navigation","authors":"N. Qi, Jian Hou, Hong Zhang","doi":"10.1109/ISSCAA.2006.1627410","DOIUrl":"https://doi.org/10.1109/ISSCAA.2006.1627410","url":null,"abstract":"The goal of designing stereo matching algorithms for lunar rover navigation on natural terrain is to produce disparity maps with both denseness and accuracy. We present a multi-stage matching algorithm in which matching results of points with larger gradient in earlier stages are used to assist in matching of points with smaller gradient in later stages for the purpose of improving matching accuracy in regions lacking texture. Two new constraints together with other constraints and statistical means are employed to achieve this matching strategy. The effectiveness of the algorithm is verified by experiments with real images of natural terrain in various conditions","PeriodicalId":275436,"journal":{"name":"2006 1st International Symposium on Systems and Control in Aerospace and Astronautics","volume":"49 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":"114587448","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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