2005 IEEE Aerospace Conference最新文献

{"title":"Adaptive bio-inspired wireless network routing for planetary surface exploration","authors":"Richard Alena, Charles Lee","doi":"10.1109/AERO.2005.1559434","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559434","url":null,"abstract":"Wireless mobile networks suffer connectivity loss when used in a terrain that has hills and valleys when line of sight is interrupted or range is exceeded. To resolve this problem and achieve acceptable network performance, we have designed an adaptive, configurable, hybrid system to automatically route network packets along the best path between multiple geographically dispersed modules. This is very useful in planetary surface exploration, especially for ad-hoc mobile networks, where computational devices take an active part in creating a network infrastructure, and can actually be used to route data dynamically and even store data for later transmission between networks. Using inspiration from biological systems, this research proposes to use ant trail algorithms with multi-layered information maps (topographic maps, RF coverage maps) to determine the best route through ad-hoc networks at real time. The determination of best route is a complex one, and requires research into the appropriate metrics, best method to identify the best path, optimizing traffic capacity, network performance, reliability, processing capabilities and cost. Real ants are capable of finding the shortest path from their nest to a food source without visual sensing through the use of pheromones. They are also able to adapt to changes in the environment using subtle clues. To use ant trail algorithms, we need to define the probability function. The artificial ant is, in this case, a software agent that moves from node to node on a network graph. The function to calculate the fitness (evaluate the better path) includes: length of the network edge, the coverage index, topology graph index, and pheromone trail left behind by other ant agents. Each agent modifies the environment in two different ways: In addition the agents are provided with some capabilities not present in real ants, but likely to help solving the problem at hand. For example each ant is able to determine how far away nodes are, what the RF coverage index is, topology favorable index and they all have a memory of which nodes they have already visited. Furthermore, we add the estimated values for next node by tracking the speed of current mobile units. The simulation shows that the method is feasible and more reliable. It is a feasible way to avoid node congestion and network interruptions without much decrease of network performance","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131779381","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}

{"title":"Test facilities study for the NASA advanced CNS architectures and systems technologies project","authors":"C. Wargo, R. Kerczewski, D. Buchanan","doi":"10.1109/AERO.2005.1559474","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559474","url":null,"abstract":"The National Aeronautics and Space Administration (NASA) Glenn research Center (GRC) is undertaking a significant new project to research, to develop and to test technologies that provide the communications, navigation and surveillance (CNS) infrastructure needed to support future air traffic management (ATM) for the U.S. National Airspace System (NAS). The development of the project's test and demonstration infrastructure is an integral part of the new project. Requirements for the infrastructure facilities are being assessed, and the plans for development of the test and demonstration facilities (TDFs) are being defined. The TDF capabilities include modeling and simulation of CNS for nationwide ATM system as well as the performance testing of wireless data links. This paper outlines the approach being taken to achieve the assessment and TDF definition","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132299314","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}

{"title":"The M.Sc. in advanced communications and navigation satellite systems","authors":"D. Teotino, M. Antonini, M. Ruggieri","doi":"10.1109/AERO.2005.1559759","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559759","url":null,"abstract":"In this paper' a new teaching initiative performed by the University of Rome \"Tor Vergata\" is presented: the Master of Science (M.Sc.) in Advanced Communications and Navigation Satellite Systems. The paper aims at delineating the challenging issues associated with the design of the M.Sc. educational programme. Moreover, information about the job opportunities potentially created in the first edition of the M.Sc. will be presented and commented on","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134356944","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}

{"title":"A gigabit-per-second Ka-band demonstration using a reconfigurable FPGA modulator","authors":"D. Lee, A. Gray, E. Kang, H. Tsou, N. Lay, W. Fong, D. Fisher, S. Hoy","doi":"10.1109/AERO.2005.1559427","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559427","url":null,"abstract":"Gigabit-per-second communications have been a desired target for future NASA Earth science missions, and for potential manned lunar missions. Frequency bandwidth at S-band and X-band is typically insufficient to support missions at these high data rates. In this paper, we present the results of a 1 Gbps 32-QAM end-to-end experiment at Ka-band using a reconfigurable field programmable gate array (FPGA) baseband modulator board. Bit error rate measurements of the received signal using a software receiver demonstrate the feasibility of using ultra-high data rates at Ka-band, although results indicate that error correcting coding and/or modulator predistortion must be implemented in addition. Also, results of the demonstration validate the low-cost, CMOS-based reconfigurable modulator approach taken to development of a high rate modulator, as opposed to more expensive ASIC or pure analog approaches","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133034266","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}

{"title":"A 4-Mbit Non-Volatile Chalcogenide Random Access Memory","authors":"L. Burcin, S. Ramaswamy, K. Hunt, J. Maimon, T. Conway, Bin Li, A. Bumgarner, G.F. Michael, J. Rodgers","doi":"10.1109/AERO.2005.1559546","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559546","url":null,"abstract":"During the first stage of a multi-year research program, BAE SYSTEMS and Ovonyx have designed, fabricated and tested a series of test chips to demonstrate full integration of a chalcogenide-based non-volatile memory element into a radiation hardened CMOS process. The test structures range from simple two- and four-point-probe material characterization macros, such as sheet resistance monitors and chalcogenide memory elements, to fully wired 64kbit memory arrays. Process integration has progressed from the previously demonstrated stand-alone chalcogenide memory elements through full memory array fabrication. Results of successful integration of the chalcogenide material used for phase-change applications in re-writable optical storage (Ge2Sb2Te5) with BAE SYSTEMS' 0.5mum radiation hardened CMOS to produce 64kbit arrays have been reported in the past. In this paper we present a description of the architecture and design of a 4Mbit, chalcogenide non-volatile memory for a 0.25mum radiation hardened CMOS process. Fabrication of the design was completed in early 2005. Electrical test results of the 4Mb chalcogenide memory hardware are presented at the conference. In addition, results from the C-RAM process transition (from BAE SYSTEMS' 0.5mum to the radiation hardened 0.25mum process) are presented","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133177864","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}

{"title":"A post-Huygens Titan surface science mission design","authors":"W. Zimmerman, J. Lunine, R. Lorenz","doi":"10.1109/AERO.2005.1559321","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559321","url":null,"abstract":"With the Cassini-Huygens atmospheric probe drop-off mission fast approaching, it is essential that scientists and engineers start scoping potential follow-on surface science missions. This paper provides a summary of the first year of a two year design study (Chau et al., 2003) which examines in detail the desired surface science measurements and resolution, potential instrument suite, and complete payload delivery system. Also provided are design concepts for both an aerial inflatable mobility platform and deployable instrument sonde. The tethered deployable sonde provides the capability to sample near-surface atmosphere, sub-surface liquid (if it exists), and surface solid material. Actual laboratory tests of the amphibious sonde prototype are also presented","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130388084","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}

{"title":"Multi Gigabit Transceiver Configuration RAM Fault Injection Response","authors":"Paul L. Murray, Doug Walquist","doi":"10.1109/AERO.2005.1559536","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559536","url":null,"abstract":"High performance processing and memory systems require enormous amounts of I/O bandwidth. Wide parallel bus architectures have reached their practical limits for high bandwidth transport. High speed serial interfaces that support 10's of Gbps are now displacing wide shared bus architectures for many systems. Xilinx FPGAs serial links support this transition by providing more than 10 Gbps in their multi gigabit transceiver (MGT) I/Os. For space applications, these links are susceptible to single event effects (SEE). Many of these effects are due to upsets in the FPGAs configuration RAM that control the many features and functions of the I/O. This paper details the functional effects of configuration RAM upsets in Xilinx MGTs. These effects are realized by injecting upsets in the FPGA configuration RAM while monitoring MGT functional operation. Configuration RAM upset effects are described and functional upset rates due to configuration RAM upsets are calculated for an example orbit. The results of this work provide insight into the on-orbit upset rate and effects of Xilinx multigigabit transceivers","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115206966","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}

{"title":"Product-Based Engine Health Management Planning","authors":"B. Beachkofski","doi":"10.1109/AERO.2005.1559642","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559642","url":null,"abstract":"The traditional method to develop a program that meets user requirements is to use the GOTChA process. However, the GOTChA method generates a list of programs that is not an executable plan; the list is generally larger than the available budget and unconnected with user transition windows. The proposed product-based planning process, entitled \"ApPRoVal\", prioritizes approaches, constructs an executable program, and aligns programs with transition opportunities. The planning process is applied to turbine engine health management and results in a plan that meets the user requirements both technologically and programmatically. By applying the process correctly, the potential exists to radically change engine support practices through health management","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114370804","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}

{"title":"Link design and planning for Mars Reconnaissance Orbiter (MRO) Ka-band (32 GHz) telecom demonstration","authors":"S. Shambayati, F. Davarian, D. Morabito","doi":"10.1109/AERO.2005.1559447","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559447","url":null,"abstract":"NASA is planning a Ka-band (32 GHz) engineering telemetry demonstration with Mars Reconnaissance Orbiter (MRO). Capabilities of Ka-band for use with deep space mission are demonstrated using the link optimization algorithms and weather forecasting. Furthermore, based on the performance of previous deep space missions with Ka-band downlink capabilities, experiment plans are developed for telemetry operations during superior solar conjunction. A general overview of the demonstration is given followed by a description of the experiment planning during cruise, the primary science mission and superior conjunction. As part of the primary science mission planning the expected data return for various data optimization methods is calculated. These results indicate that, given MRO's data rates, a link optimized to use of at most two data rates, subject to a minimum availability of 90%, performs almost as well as a link with no limits on the number of data rates with the same minimum availability requirement. Furthermore, the effects of forecasting on these link design algorithms are discussed","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116264407","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}

{"title":"Designing Autolanding Neuro-Controller Using PID and Optimal Strategies","authors":"H. Izadi, M. Pakmehr, M. Moghaddam","doi":"10.1109/AERO.2005.1559589","DOIUrl":"https://doi.org/10.1109/AERO.2005.1559589","url":null,"abstract":"Designing a Neuro Controller for longitudinal autolanding system of a commercial jet transport has been considered. To train the neuro controller there are so many strategies in selecting the training data. In this paper, first a PID and an optimal controller for autolanding system have been designed. Then, the outputs of these two classic controllers have been used to train the neuro controller separately. Furthermore, the robustness of the controllers has been investigated by applying the gust and changing the flight conditions. Other advantages and disadvantages of the controllers have also been discussed. Simulation results show that PID controllers due to their robustness and Optimal controllers due to their performance are good candidates to train the neuro-controller","PeriodicalId":117223,"journal":{"name":"2005 IEEE Aerospace Conference","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2005-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115117460","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}