2012 IEEE Aerospace Conference最新文献_第3页

A fault-tolerant programmable voter for software-based N-modular redundancy 基于软件的n模冗余容错可编程投票人

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187253

Keun Soo YIM, V. Sidea, Z. Kalbarczyk, Deming Chen, R. Iyer

{"title":"A fault-tolerant programmable voter for software-based N-modular redundancy","authors":"Keun Soo YIM, V. Sidea, Z. Kalbarczyk, Deming Chen, R. Iyer","doi":"10.1109/AERO.2012.6187253","DOIUrl":"https://doi.org/10.1109/AERO.2012.6187253","url":null,"abstract":"This paper presents a fault-tolerant, programmable voter architecture for software-implemented N-tuple modular redundant (NMR) computer systems. Software NMR is a cost-efficient solution for high-performance, mission-critical computer systems because this can be built on top of commercial off-the-shelf (COTS) devices. Due to the large volume and randomness of voting data, software NMR system requires a programmable voter. Our experiment shows that voting software that executes on a processor has the time-of-check-to-time-of-use (TOCTTOU) vulnerabilities and is unable to tolerate long duration faults. In order to address these two problems, we present a special-purpose voter processor and its embedded software architecture. The processor has a set of new instructions and hardware modules that are used by the software in order to accelerate the voting software execution and address the identified two reliability problems. We have implemented the presented system on an FPGA platform. Our evaluation result shows that using the presented system reduces the execution time of error detection codes (commonly used in voting software) by 14% and their code size by 56%. Our fault injection experiments validate that the presented system removes the TOCTTOU vulnerabilities and recovers under both transient and long duration faults. This is achieved by using 0.7% extra hardware in a baseline processor.","PeriodicalId":6421,"journal":{"name":"2012 IEEE Aerospace Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81012245","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: 18

Commanding the James Webb Space Telescope using event-driven operations software 使用事件驱动操作软件指挥詹姆斯·韦伯太空望远镜

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187392

S. Barrow, V. Balzano

{"title":"Commanding the James Webb Space Telescope using event-driven operations software","authors":"S. Barrow, V. Balzano","doi":"10.1109/AERO.2012.6187392","DOIUrl":"https://doi.org/10.1109/AERO.2012.6187392","url":null,"abstract":"This paper provides an overview of the event-driven architecture that will be used onboard the James Webb Space Telescope (JWST) to carry out the series of exposures, maneuvers, and engineering activities that were selected beforehand by the JWST planning and scheduling subsystem. Each week during one of the ground communication intervals one observation plan segment that contains an ordered list of tasks for JWST will be uploaded to the telescope. A set of JavaScripts running onboard JWST will be responsible for implementing the series of tasks listed in the weekly observation plan segments as sequences of flight software commands. The JavaScripts will execute the observation plan segments in an event-driven manner, in which the JavaScripts query JWST telemetry to determine when to execute the flight software commands needed to carry out the observation plan. The onboard JavaScripts consult command and telemetry dictionaries to construct command requests and CCSDS telemetry queries. This paper will demonstrate how creating flight software commands as they are needed onboard simplifies the ground to flight interface, and allows onboard events to be taken into consideration during operations.","PeriodicalId":6421,"journal":{"name":"2012 IEEE Aerospace Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84052808","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

A rule-based decision support tool for architecting Earth observing missions 用于构建地球观测任务的基于规则的决策支持工具

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187439

Daniel Selva, E. Crawley

{"title":"A rule-based decision support tool for architecting Earth observing missions","authors":"Daniel Selva, E. Crawley","doi":"10.1109/AERO.2012.6187439","DOIUrl":"https://doi.org/10.1109/AERO.2012.6187439","url":null,"abstract":"A decision support tool is presented that is especially tailored for architecting Earth observing missions and programs. The tool features both a cost model and a performance model. This paper focuses on the description of the performance model. Indeed, while considerable effort has been put into the development of cost estimating models, comparably much less effort has been put into the development of quantitative methods to assess how well Earth Observing Mission satisfy scientific and societal needs. A literature review revealed that existing methods include a commercial approach, a value-of-information approach, end-to-end simulation, assimilation in Observing System Simulation Experiments, and simple expert judgment. Limitations of these methods include limited applicability, computational complexity, low modeling fidelity (e.g. abstraction of synergies between measurements), and subjectivity. Our method uses a knowledge-based system to store and manage large quantities of expert knowledge in the form of rules-of-thumb that replace expensive computations. Scientific and societal measurement requirements and instrument capabilities are expressed in the form of logical rules and data structures. An efficient pattern matching algorithm performs the comparison of the measurement requirements and the measurement capabilities on the basis of 64 different measurement attributes. The system is demonstrated on the Earth Science Decadal Survey. While the system is still under development, it shows great potential to enhance traceability in the modeling of scientific and societal value of Earth observing missions. Furthermore, the recursive nature of rule-based systems shows potential to model synergies between instruments and measurements, at a sufficient level of fidelity for architectural trade studies, especially for the ones conducted in committees with experts such as Decadal Surveys.","PeriodicalId":6421,"journal":{"name":"2012 IEEE Aerospace Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84070333","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

Quasi-monolithic structures for spaceflight using hydroxide-catalysis bonding 氢氧催化键合用于航天的准整体结构

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187157

A. Preston, J. Thorpe, L. Miner

{"title":"Quasi-monolithic structures for spaceflight using hydroxide-catalysis bonding","authors":"A. Preston, J. Thorpe, L. Miner","doi":"10.1109/AERO.2012.6187157","DOIUrl":"https://doi.org/10.1109/AERO.2012.6187157","url":null,"abstract":"Next generation space telescopes and interferometric missions will require stringent position and stability tolerances. To do this, these missions will require materials and bonding techniques with ever-increasing stability in order to make their measurements. As an example, the Laser Interferometer Space Antenna (LISA) will detect and observe gravitational waves in the 0.1 mHz to 1 Hz frequency range with strain sensitivities on the order of 10-21 at its most sensitive frequency. To make these measurements, critical components such as the optical bench or telescope support structure will need to have path-length stabilities of better than 1 pm/√Hz. The baseline construction method for the LISA optical bench is to affix fused silica components to a Zerodur baseplate using hydroxide-catalysis bonding (HCB). HCB is a recently developed technique that allows the bonding of glasses, some metals, and silicon carbide with significant strength and stability with a bond thickness of less than a few micrometers. In addition, a wide range of surface profiles can be bonded using only a small amount of hydroxide solution. These characteristics make HCB ideal for adhering components in complex optical systems. In addition to being used to construct the LISA optical bench, the HCB technique shows great promise for constructing other structures such as hollow retroreflectors to be used for lunar laser ranging, or a visible nulling coronograph to be used for exoplanet detection. Here we present construction techniques that could be used to make an optical bench, hollow retroreflector, nulling coronograph, or other quasi-monolithic structures using HCB. In addition, we present dimensional stability results of an optical bench that was made using HCB, as well as HCB strength measurements.","PeriodicalId":6421,"journal":{"name":"2012 IEEE Aerospace Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84165272","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

Conceptual development of the DESDynI mission DESDynI任务的概念发展

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187024

H. Eisen, B. Jai, P. Rosen, L. Veilleux, P. Xaypraseuth

{"title":"Conceptual development of the DESDynI mission","authors":"H. Eisen, B. Jai, P. Rosen, L. Veilleux, P. Xaypraseuth","doi":"10.1109/AERO.2012.6187024","DOIUrl":"https://doi.org/10.1109/AERO.2012.6187024","url":null,"abstract":"The high value of Radar and Lidar data for understanding climate change and earth dynamics led to the prioritization of the Deformation, Ecosystem Structure and Dynamics of Ice (DESDynI) mission as Tier One in the last National Academy of Sciences' Earth Science Decadal Survey. A mission concept that matched those desired objectives underwent pre-Project development and passed several layers of review in late 2010 and early 2011 with the target of a 2017 launch. However, cuts in the proposed FY2012 budget forced a reset of the Radar mission and eliminated the Lidar sciencecraft. The proposed DESDynI-Radar mission may now fulfill a more limited set of objectives with a more modest budget on a longer development timescale. A multitude of options have been studied with varying levels of cost, risk and science value. Flight and Ground system implementations have a direct bearing on many of these factors and will also be addressed. The methodology and status of evaluating these options will be discussed. A key distinguishing characteristic of the projected DESDynI-Radar measurement would be large scale coverage and frequent revisit at fine resolution. This would be enabled via a new Radar technique called SweepSAR. Efforts to develop and field test SweepSAR will also be discussed, as well as other technology developments underway that are associated with this mission.","PeriodicalId":6421,"journal":{"name":"2012 IEEE Aerospace Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77764422","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

New sensing application to diagnose power semiconductor aging in actuator power drive systems 传感诊断致动器功率驱动系统中功率半导体老化的新应用

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187388

I. Ali, A. Ginart, J. Goldin, P. Kalgren, M. Roemer, S. Poll

引用次数: 0

Data-driven fault diagnosis in a hybrid electric vehicle regenerative braking system 混合动力汽车再生制动系统的数据驱动故障诊断

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187368

C. Sankavaram, B. Pattipati, K. Pattipati, Yilu Zhang, Mark N Howell, M. Salman

引用次数: 15

Improved heuristic and evolutionary methods for tactical missile mission planning 战术导弹任务规划的改进启发式和进化方法

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187213

Cagatay Tanil

{"title":"Improved heuristic and evolutionary methods for tactical missile mission planning","authors":"Cagatay Tanil","doi":"10.1109/AERO.2012.6187213","DOIUrl":"https://doi.org/10.1109/AERO.2012.6187213","url":null,"abstract":"In this paper, improved heuristic and evolutionary methods are presented for pre-launch trajectory optimization of a tactical missile. Computation time and trajectory length are minimized as objectives whereas maneuverability of the missile, total amount of fuel, obstacles, no-fly zones, islands, shorelines are considered to be constraints. There are two main methods developed for this purpose. One method is based on heuristic search by adaptive-based A* algorithm. In this method, sub-optimal path is obtained by constructing a network in which node distance (leg length) and node intensity can be changed adaptively with respect to mission environment in the search time. This enhancement in conventional A* method leads to closer optimal trajectories in less computation load especially in complex mission scenarios such as shorelines having narrow pass, too many unintended targets or friends etc. The other proposed path planning method is improved genetic algorithm. This algorithm has a variable-length chromosome and a real-valued encoding as well as an intelligent population creation method that produces feasible individuals only. By means of starting with a feasible population, it is observed that convergence time is far less than using random creation of initial population. Furthermore, for rapid analysis and comparison of the two proposed methods in different environments, a generic graphical user interface (MPT-The Mission Planning Tool) is developed.","PeriodicalId":6421,"journal":{"name":"2012 IEEE Aerospace Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79886623","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

Silicon carbide power processing unit for Hall effect thrusters 霍尔效应推力器用碳化硅功率处理单元

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187244

B. Reese, B. Mcpherson, M. Schupbach, A. Lostetter

引用次数: 2

Tunable narrow linewidth laser source for a methane lidar 甲烷激光雷达的可调谐窄线宽激光源

2012 IEEE Aerospace Conference Pub Date : 2012-03-03 DOI: 10.1109/AERO.2012.6187178

S. Li, H. Riris, K. Numata, S. Wu, D. Poulios, A. Ramanathan, J. Abshire, M. Krainak

引用次数: 8