Proceedings 2002 NASA/DoD Conference on Evolvable Hardware最新文献

The failure of a small satellite and the loss of a space science mission 一颗小卫星的失败和一项太空科学任务的失败

Proceedings 2002 NASA/DoD Conference on Evolvable Hardware Pub Date : 2002-07-15 DOI: 10.1109/EH.2002.1029856

R. Katz

{"title":"The failure of a small satellite and the loss of a space science mission","authors":"R. Katz","doi":"10.1109/EH.2002.1029856","DOIUrl":"https://doi.org/10.1109/EH.2002.1029856","url":null,"abstract":"Summary form only given. On March 4, 1999, the Wide-Field Infrared Explorer (WIRE) was launched from Vandenberg Air Force Base on a Pegasus XL launch vehicle into a 540 km orbit with a planned mission duration of four months. WIRE was designed to conduct a deep infrared, extra galactic science survey 500 times more sensitive than the Infrared Astronomy Satellite (IRAS) Faint Source Catalog. The instrument consists of, a cryogenically cooled, 30-centimeter telescope and all associated electronics designed to detect faint astronomical sources in two infrared wavelength bands. The WIRE launch was nominal. Shortly after launch, ground commands were transmitted to perform a planned secondary venting of the secondary hydrogen tank. The next pass showed that the spacecraft was tumbling at increasing rate, ultimately spinning up to 60 rpm. Within 36 hours of launch, the instrument's 4-month supply of cryogen was completely exhausted. The WIRE>scientific mission was declared lost on March 8,1999. The root cause of the WIRE mission loss is a digital logic design error in the instrument pyro electronics box, which inadvertently caused the cover to be ejected. The transient performance of components was not adequately considered in the box design resulting in the inadvertent pyrotechnic device firing during the initial pyro electronics box power-up. The results from the investigation into the failure mechanism will be discussed; that is, how did the mission fail. An equally important question is why did the mission fail. Spacecraft systems go through a variety of analyses, simulations, tests, and reviews. These will be discussed showing why the error resulted in a mishap on-orbit. A review of launcher and spacecraft performance and failures in the Industry over the last decade will be reviewed. Trends will be presented and discussed.","PeriodicalId":322028,"journal":{"name":"Proceedings 2002 NASA/DoD Conference on Evolvable Hardware","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114988624","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

An EHW architecture for real-time GPS attitude determination based on parallel genetic algorithm 基于并行遗传算法的GPS实时姿态确定EHW体系结构

Proceedings 2002 NASA/DoD Conference on Evolvable Hardware Pub Date : 2002-07-15 DOI: 10.1109/EH.2002.1029877

Jiangning Xu, T. Arslan

引用次数: 24

Evolution of quantum computer algorithms from reversible operators 从可逆算子演化的量子计算机算法

Proceedings 2002 NASA/DoD Conference on Evolvable Hardware Pub Date : 2002-07-15 DOI: 10.1109/EH.2002.1029884

A. Surkan, A. Khuskivadze

引用次数: 8

The robustness of small developed SBlock circuits using different clocking schemes 采用不同时钟方案的小型开发SBlock电路的鲁棒性

Proceedings 2002 NASA/DoD Conference on Evolvable Hardware Pub Date : 2002-07-15 DOI: 10.1109/EH.2002.1029862

P. V. Remortel, T. Lenaerts, B. Manderick

{"title":"The robustness of small developed SBlock circuits using different clocking schemes","authors":"P. V. Remortel, T. Lenaerts, B. Manderick","doi":"10.1109/EH.2002.1029862","DOIUrl":"https://doi.org/10.1109/EH.2002.1029862","url":null,"abstract":"Biological development is a stunning mechanism that allows robust generation of complex structures from a linear building plan. This makes it an interesting source of inspiration for solving problems where direct manipulation of a higher-order structure is hard, and the generative building plan can be used as a substitute for indirect manipulation of the unfolded structure. We investigate the possibility of adopting a nondeterministic developmental mapping in the evolution of electronic circuits, which demands that phenotypes be functionally stable despite limited structural change. We study the functional robustness of small SBlock circuits under different amounts and types of 'developmental' noise, using different clocking schemes. We report an exponential decrease in robustness with increasing noise. We provide experimental results that show that noise injected later on the developmental timescale shows less harmful then 'early' noise. This effect becomes more significant as the total amount of noise increases. The relative ranking of the effects of different types of noise seems not affected by the clocking scheme.","PeriodicalId":322028,"journal":{"name":"Proceedings 2002 NASA/DoD Conference on Evolvable Hardware","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121749127","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

Application of the univariate marginal distribution algorithm to analog circuit design 单变量边际分布算法在模拟电路设计中的应用

Proceedings 2002 NASA/DoD Conference on Evolvable Hardware Pub Date : 2002-07-15 DOI: 10.1109/EH.2002.1029871

L. Zinchenko, H. Mühlenbein, V. Kureichik, T. Mahnig

引用次数: 11

Optimizing signal strength in-situ using an evolvable antenna system 利用可进化天线系统优化现场信号强度

Proceedings 2002 NASA/DoD Conference on Evolvable Hardware Pub Date : 2002-07-15 DOI: 10.1109/EH.2002.1029879

D. Linden

引用次数: 26

We need assurance 我们需要保证

Proceedings 2002 NASA/DoD Conference on Evolvable Hardware Pub Date : 2002-07-15 DOI: 10.1109/EH.2002.1029855

Brian D. Snow

引用次数: 20

Self-reproduction in asynchronous cellular automata 异步元胞自动机的自复制

Proceedings 2002 NASA/DoD Conference on Evolvable Hardware Pub Date : 2002-07-15 DOI: 10.1109/EH.2002.1029886

Chrystopher L. Nehaniv

{"title":"Self-reproduction in asynchronous cellular automata","authors":"Chrystopher L. Nehaniv","doi":"10.1109/EH.2002.1029886","DOIUrl":"https://doi.org/10.1109/EH.2002.1029886","url":null,"abstract":"Building on the work of Von Neumann, Burks, Codd, and Langton, among others, we introduce the first examples of asynchronous self-reproduction in cellular automata. Reliance on a global synchronous update signal has been a limitation of all solutions since the problem of achieving self-production in cellular automata was first attacked by Von Neumann half a century ago. Our results obviate the need for this restriction. We introduce a simple constructive mechanism to transform any cellular automata network with synchronous update into one with the same behavior but whose cells may be updated randomly and asynchronously. This is achieved by introduction of a synchronization substratum which locally keeps track of the passage of time in a local neighborhood in a manner that keeps all cells locally in-step. The generality of this mechanism is guaranteed by a general mathematical theorem (due to the author) that allows any synchronous cellular automata configuration and rule to be realized asynchronously in such a way the the behavior of the original synchronous cellular automata can be recovered from that of the corresponding asynchronous cellular automaton. Thus all important results on self-reproduction, universal computation, and universal construction, and evolution in populations of self-reproducing configurations in cellular automata that have been obtained in the past carry over to the asynchronous domain.","PeriodicalId":322028,"journal":{"name":"Proceedings 2002 NASA/DoD Conference on Evolvable Hardware","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2002-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134479688","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: 32

Coevolution of form and function in the design of micro air vehicles 微型飞行器设计中形态与功能的协同进化

Proceedings 2002 NASA/DoD Conference on Evolvable Hardware Pub Date : 2002-07-15 DOI: 10.1109/EH.2002.1029881

M. Bugajska, A. Schultz

引用次数: 26

Evolutionary technique to elementary coding of the internal states of the state machine 演化技术对状态机内部状态进行基本编码

Proceedings 2002 NASA/DoD Conference on Evolvable Hardware Pub Date : 2002-07-15 DOI: 10.1109/EH.2002.1029867

I. Vasiltsov

引用次数: 2