2007 IEEE Aerospace Conference最新文献_第8页

Estimating Queue Size in a Computer Network Using an Extended Kalman Filter 用扩展卡尔曼滤波估计计算机网络中的队列大小

2007 IEEE Aerospace Conference Pub Date : 2007-03-03 DOI: 10.1109/AERO.2007.352937

N. Stuckey, J. Vasquez, S. Graham

引用次数: 2

Online Multisensor-Multitarget Detection and Tracking Using Variable Rate Particle Filters 基于可变速率粒子滤波的在线多传感器多目标检测与跟踪

2007 IEEE Aerospace Conference Pub Date : 2007-03-03 DOI: 10.1109/AERO.2007.353047

W. Ng, J. Li, S. Godsill

{"title":"Online Multisensor-Multitarget Detection and Tracking Using Variable Rate Particle Filters","authors":"W. Ng, J. Li, S. Godsill","doi":"10.1109/AERO.2007.353047","DOIUrl":"https://doi.org/10.1109/AERO.2007.353047","url":null,"abstract":"In this paper we present an online approach for joint detection and tracking for multiple targets using variable rate particle filters (VRPFs). Unlike conventional models and particle filters, the proposed method utilises the applied forces (tangential and radial components) to model target motions and does not assume the hidden state to change at the same rate as the observations. In effect not only does the proposed method enable us to model parsimoniously the manoeuvring behaviours of targets with a single dynamical model but it also provides a more efficient framework for recursive estimation of the targets' positions since much fewer states will be estimated. In addition, a target detection/termination module will be integrated in the proposed method in which a track initiation, termination, or maintenance move is randomly executed using Bayesian Monte Carlo methods. To model a more realistic observation environment Poisson process is chosen for all target originating and spurious measurements. Unlike other observation models, the proposed model does not require extensive computation for data association between active targets and observations, prior to target state estimation, as a result. To improve the quality of the particles we adopt a data-dependent importance sampling strategy in which the latest observations are involved when new particles are updated. This enables the target states to be updated as new observations arrive while keeping the number of states sufficiently low to track the manoeuvres of the targets. Computer simulations demonstrate the potential of the proposed method for detecting and tracking multiple highly manoeuverable targets in a hostile environment with high clutter density and low detection probability.","PeriodicalId":6295,"journal":{"name":"2007 IEEE Aerospace Conference","volume":"73 1","pages":"1-16"},"PeriodicalIF":0.0,"publicationDate":"2007-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89225972","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

On Dynamic Range of Digital Receivers 数字接收机动态范围研究

2007 IEEE Aerospace Conference Pub Date : 2007-03-03 DOI: 10.1109/AERO.2007.352968

Y. Poberezhskiy

引用次数: 24

Remote Detection of Bearing Fatigue Spalls via the Dynamic Response of Bearings on the Same Shaft 基于同一轴上轴承动态响应的轴承疲劳裂纹远程检测

2007 IEEE Aerospace Conference Pub Date : 2007-03-03 DOI: 10.1109/AERO.2007.352839

D. Tow, S. Marble

引用次数: 2

JWST Lightweight Mirror TRL-6 Results JWST轻量级镜像TRL-6结果

2007 IEEE Aerospace Conference Pub Date : 2007-03-03 DOI: 10.1109/AERO.2007.353006

H. P. Stahl, Nasa Msfc

引用次数: 14

Opportunities for Prognostic Health Monitoring 预后健康监测的机会

2007 IEEE Aerospace Conference Pub Date : 2007-03-03 DOI: 10.1109/AERO.2007.352875

M. Karchnak, R. Shipman

{"title":"Opportunities for Prognostic Health Monitoring","authors":"M. Karchnak, R. Shipman","doi":"10.1109/AERO.2007.352875","DOIUrl":"https://doi.org/10.1109/AERO.2007.352875","url":null,"abstract":"In a previous series of IEEE Aerospace Conference Papers, specific technical characteristics of a Robust Laser Interferometer (RLI) were presented, with emphasis on applicability for aviation Prognostic Health Monitoring . It was demonstrated that acoustic emissions (AE) in broadband vibrations are observable in detail, and that processing tools such as envelope processing of the high frequency (hundreds of kilohertz) broadband RLI measurements exhibits substantial potential for component and system health monitoring. Functional interests that range beyond mechanical system health, such as electrical wiring health monitoring, were presented along with system implementation choices. Physical system implementation choices presented ranged from a fiber-optic routed RLI through 'Point-and-Shoot' configurations. Multi-functional integrated health monitoring choices were also introduced. Most significantly, the measurement performance capability over a frequency range from 0 Hertz through hundreds of kilohertz was presented in detail. Realizing that one concern associated with robust high volume data systems relates to the \"information extraction\", opportunities for RLI-based Prognostic Health Monitoring are examined from four 'information sensitive' opportunity viewpoints. These include: (i) \"artifact free\" wideband spectrum data; (ii) use of \"system basis\" for PHM design; (iii) user friendliness; and (iv) application of the \"logic of science\". It is postulated that when considered together, such information opportunities can provide a basis for a quantum upgrade of PHM system capabilities.","PeriodicalId":6295,"journal":{"name":"2007 IEEE Aerospace Conference","volume":"118 1","pages":"1-19"},"PeriodicalIF":0.0,"publicationDate":"2007-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87941956","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

Herschel/Planck Program-From Complex Mission Design to Verification and Operations 赫歇尔/普朗克计划——从复杂的任务设计到验证和操作

2007 IEEE Aerospace Conference Pub Date : 2007-03-03 DOI: 10.1109/AERO.2007.352710

A. Heske, T. Passvogel, G. Crone, P. Estaria, J. Juillet

引用次数: 1

Terrestrial Attitude Estimation for the Formation Control Testbed (FCT) 编队控制试验台(FCT)地面姿态估计

2007 IEEE Aerospace Conference Pub Date : 2007-03-03 DOI: 10.1109/AERO.2007.352658

Joel Shieldst, Hannah Goldberg, Jason Kiem, Mauricio Morales, Dan Scharf

{"title":"Terrestrial Attitude Estimation for the Formation Control Testbed (FCT)","authors":"Joel Shieldst, Hannah Goldberg, Jason Kiem, Mauricio Morales, Dan Scharf","doi":"10.1109/AERO.2007.352658","DOIUrl":"https://doi.org/10.1109/AERO.2007.352658","url":null,"abstract":"In this paper we look at the problem of terrestrial (earth based) attitude estimation of a unique robotic vehicle using full three axis attitude measurements and three axis inertial rate sensors (gyros). The vehicle is completely autonomous and uses air bearings to simulate the drag free dynamic environment of space. An onboard infrared camera system is used to provide quaternion measurements representing the attitude of the robot relative to the room frame of the test facility. Fiber optic gyros are used to sense the inertial angular rates. To simulate the performance of the system, a stochastic model of the gyros was developed based on long term rate table data. The angle random walk, bias, and bias stability were determined to agree with the data provided in the manufactures specification sheet. We show that a 3times reduction in the standard deviation of the attitude estimates can be achieved by proper mixing of the two sensor measurements. The attitude estimation algorithm used in this paper also provides bias free estimates of the angular rate which can be used for control or other purposes. These results are established in both high fidelity simulations and experimentally using data taken during real time operation of the robot.","PeriodicalId":6295,"journal":{"name":"2007 IEEE Aerospace Conference","volume":"88 1","pages":"1-10"},"PeriodicalIF":0.0,"publicationDate":"2007-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88955299","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

A Storyboard Tool to Assist Concept of Operations Development 辅助操作概念开发的故事板工具

2007 IEEE Aerospace Conference Pub Date : 2007-03-03 DOI: 10.1109/AERO.2007.352990

C. Thronesbery, A. Molin, D. Schreckenghost

引用次数: 6

An Optimization-Based Method for Dynamic Multiple Fault Diagnosis Problem 基于优化的动态多故障诊断方法

2007 IEEE Aerospace Conference Pub Date : 2007-03-03 DOI: 10.1109/AERO.2007.352868

Satnam Singh, S. Ruan, Kihoon Choi, K. Pattipati, P. Willett, S. Namburu, S. Chigusa, D. Prokhorov, Liu Qiao

引用次数: 11