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Aerospace and Electronic Systems Magazine, IEEE

Issue 9 • Date Sept. 2002

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Displaying Results 1 - 7 of 7
  • Radar target backscattering simulation

    Publication Year: 2002 , Page(s): 38 - 40
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (247 KB)  

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  • A systems perspective on current ATC trends

    Publication Year: 2002 , Page(s): 28 - 32
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    The air traffic control system is about to undergo a profound transformation from a ground-based, centralized, loosely integrated system to a space-based, decentralized, tightly integrated system-of-systems. This article examines this transformation from a systems perspective. The trade-offs between centralized and decentralized architectures are identified, the enabling technologies are discussed in detail, and the political challenges of building such a system are examined. The article concludes with some strategies for coping with the political challenges of building a complex system-of-systems. View full abstract»

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  • Microthrusters in silicon for aerospace application

    Publication Year: 2002 , Page(s): 22 - 27
    Cited by:  Papers (1)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (596 KB)  

    This paper reviews the results of the thermal and static analysis of small motor aerospace technology (SMART) propulsion system, constituted of a microthrusters array realised by MEMS technology on silicon wafers. This system has been studied using FEM (NASTRAN) and the results have been verified by the electro-thermic analogy and the FDM method, using, respectively, SPICE and MATLAB codes. The simulation results demonstrated the feasibility of SMART systems for aerospace applications such as attitude control and deorbiting missions for small satellite station-keeping. A theoretical impulse of 20 mNs has been calculated for the SMART system. View full abstract»

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  • Performance, life-cycle cost, and emissions of fuel cells

    Publication Year: 2002 , Page(s): 33 - 37
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (420 KB)  

    In this tutorial we evaluate the present status and future direction of fuel cell development. The three most promising types of fuel cells being evaluated for electric vehicle propulsion are: (1) direct hydrogen-consuming fuel cells; (2) methanol-consuming fuel cells; and (3) zinc-air fuel cells. The author evaluates the advantages and disadvantages of each type. View full abstract»

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  • Aging avionics: the problems and the challenges

    Publication Year: 2002 , Page(s): 16 - 21
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    Aging avionics have become a problem because aircraft are being kept in service far longer than the original plan. This paper discusses the four key problems of aging avionics: (1) determining the systems that are the high cost drivers in order to select those that should receive priority; (2) determining the requirements for the replacement; (3) identifying alternative technologies that will satisfy the requirements and are affordable; and (4) determining the funding required and acquiring the funding needed to replace the aging avionics. Challenges encountered in solving these problems include management and technical. The problem of aging avionics is not limited to a single aircraft, but occurs across all aircraft. Cost-effective modernization requires cutting horizontally across all aging aircraft, and coordination with the end users and the existing management structure. A key technical challenge is to select an architecture that is upgradeable since the funding limitations may ensure parts will become obsolete prior to the completion of a drawn-out production. View full abstract»

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  • Fingerprint verification using smart cards for access control systems

    Publication Year: 2002 , Page(s): 12 - 15
    Cited by:  Papers (4)
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (327 KB)  

    Over the past few years, the authors have tried to integrate biometrics into a smart card. In this paper, to improve error rates obtained with hand geometry biometrics and the costs with the iris recognition system, fingerprints are used. This technique, quite well known in the industry and deeply studied for the last century, has improved its electronic sensors, pulling down prices and, therefore, enabling its use in many more applications. The first step, as in every biometric system, is to obtain an image of the user's fingerprint. After this, a pre-processing algorithm is applied, which enables feature extraction to obtain the location and type of all minutiae, i.e., the discontinuities in the ridges and valleys of the fingerprint. Due to the fact that it is not possible to always catch the same number of minutiae, a special matching algorithm should be applied to compare the feature vector with the corresponding user's template. Efforts to integrate this matching algorithm in a low computer power device, such as a smart card, are given, showing the paths that should be followed in order to improve the security of access control and payment systems available today. View full abstract»

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  • The Space Systems Technical Panel

    Publication Year: 2002 , Page(s): 3 - 11
    Cited by:  Papers (2)
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    The Space Systems Technical Panel of the IEEE Aerospace and Electronic Systems Society (AESS) was conceived in 2000 and established in 2001. The aims and main activities of the panel are highlighted together with an overview of the status of some ongoing key European space programs. View full abstract»

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Aims & Scope

The IEEE Aerospace and Electronic Systems Magazine publishes articles and tutorials concerned with the various aspects of systems for space, air, ocean, or ground environments.

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Editor-in-Chief
Teresa Pace, PhD EE
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