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Aerospace and Electronic Systems Magazine, IEEE

Issue 2 • Date Feb. 1994

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Displaying Results 1 - 8 of 8
  • "Reinventing" career development

    Page(s): 3 - 8
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (554 KB)  

    The following topics are dealt: career development definition; career development as a part of effective management; job satisfaction issues; motivated abilities; a case study results; identification of motivational patterns; and 'reinvention' of career development.<> View full abstract»

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  • Tracking of planetary terrains

    Page(s): 9 - 18
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1006 KB)  

    The AFAST project (Autonomously Feature And Star Tracking) at the Jet Propulsion Laboratory, California Institute of Technology is engaged in the attitude determination and tracking of the CCD camera pointing direction on future spacecraft missions. Ground based attitude determination is time-consuming and costly. This implies that the attitude determination and the tracking of the pointing direction must be autonomous and rely exclusively on the CCD sensor. Also, distant observations call for autonomy, as relay times to Earth make ground control infeasible. This paper presents a strategy to track the pointing direction on planetary terrains. The strategy utilizes multiple closed contours in a planetary image. It accomplishes tracking by recognizing a constellation of the closed contours. The strategy is adaptable to both spacecraft and missile applications.<> View full abstract»

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  • Printed circuit board diagnosis using artificial neural networks and circuit magnetic fields

    Page(s): 20 - 24
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (573 KB)  

    Testing of electronic systems using conventional testing methods has become more difficult and costly as these systems have become more complex and compact. Conventional testing methods and systems often require lengthy analysis to define testing strategies. These test systems may require lengthy test periods, complex stimulus and measurement instrumentation as well as complicated fixturing. The results are often ambiguous and require further interpretation. This paper presents an exploration of a "non-intrusive" test method based on interpreting changes in the magnetic field close to a Printed Circuit Board (PCB). Currents moving between devices on the PCB produce these magnetic fields. Changes of the PCB operational status due to faults cause changes in the associated magnetic field pattern that can be interpreted by Artificial Neural Networks (ANNs) for fault identification. An apparatus to collect magnetic field measurements is described along with some problems of collecting data. Typical magnetic field patterns for "known-good" and faulted PCBs are presented. Possible extensions of the method are discussed. This paper resulted from internally funded work at Southwest Research Institute (SwRI) concerning non-intrusive diagnostic techniques.<> View full abstract»

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  • Quality first. A model for TQM implementation and planning

    Page(s): 25 - 27
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (293 KB)  

    Experience at Harris with managing change through Continuous Improvement (CI) has demonstrated it is a Socio-Technical process... that is, the human elements are crucial and must be addressed before pressing for structural, institutional or technological change. Harris utilizes a five-stage business improvement model. It is not a road map to problem solving, rather it is an analysis and direction-setting framework, which can be applied to virtually any business situation. We have used it to insert major technology advances, characterize multifunctional business processes, solve a problem, develop a new product, improve a service, etc. The model is easy to teach, easy to understand, and easy to follow. It guides the application of the correct set of Continuous Improvement tools at the correct time to achieve the goal.<> View full abstract»

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  • Automated inspection of through hole solder joints utilizing X-ray imaging

    Page(s): 28 - 32
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (416 KB)  

    Solder joint inspection has traditionally been done by manual inspection. The disadvantage of manual inspection is the large amount of time required and the decrease in efficiency as operator fatigue occurs. This has prompted the development of automated inspection systems to speed up the inspection process and increase efficiency. Automated inspection systems typically use visible light, infrared light or X-rays to illuminate the board. These systems require solder joint position information that is provided either by CAD data or by human entry of the position information. This paper describes a preliminary, automated inspection system that finds the solder joints in an X-ray image and inspects them using an artificial neural network (ANN). The identification of solder joints in the gray-scale image is done using image processing techniques; CAD data or manual registration of the solder joints is not required. The image processing techniques also yield binary maps (i.e., black and white images) showing the locations of ICs and other components, which is useful for other diagnostics.<> View full abstract»

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  • First order exponential approximations for small arguments

    Page(s): 33 - 35
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (208 KB)  

    Most functions of interest in engineering problems can be approximated as f(/spl chi/)=A/spl chi//sup M/ exp /spl lcub/B/spl chi//sup N//spl rcub/ for small values of the argument /spl chi/, where A, B, M and N are constants. Such a decomposition allows one to rapidly visualize the functional dependence for small arguments, and is also useful in evaluating products and quotients of functions. Applications in electromagnetics include scattering, radiation and antenna problems.<> View full abstract»

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  • SMES benefit analysis using a production cost model for Puget Sound application

    Page(s): 36 - 39
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (401 KB)  

    Superconducting magnetic energy storage (SMES) is an emerging technology that is expected to provide a means of storing electrical energy for use during peak demand periods. Pacific Northwest Laboratory (PNL) has estimated benefits and costs associated with the use of SMES technology and has provided insight into the overall future potential of SMES in the service area of the Bonneville Power Administration (BPA) and on systems that connect and exchange power with BPA.<> View full abstract»

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  • AEGIS ORTS/spl minus/the first and future ultimate integrated diagnostics system

    Page(s): 40 - 45
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (522 KB)  

    The AEGIS Weapon System's Operational Readiness Test System (ORTS) was the predecessor to current Integrated Diagnostic Systems. Evolving from cost effective, diagnostic mix modeling and analysis, it optimally integrated the diagnostic apparatus of the era with AEGIS weapons. As such system's target the 21st century, more complete integration can be achieved. An entire ship, including weapon system, hull mechanical and electrical systems, and propulsion systems can be serviced by a single Integrated Diagnostic System.<> 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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Meet Our Editors

Editor-in-Chief
Teresa Pace, PhD EE
Chief Engineer SenTech
SenTech, LLC - A DSCI Company
12601 Research Parkway
Orlando, FL 32826
(407) 207-1900 ext: 2102
(407) 450-0929 (BB)
tpace@sentech.dsci.com