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Aerospace, IEEE Transactions on

Issue 4 • Date Oct. 1964

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  • Table of contents

    Page(s): c1
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  • IEEE Aerospace Group

    Page(s): c2
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  • Important Announcement to all Subscribers and Group Members

    Page(s): 1125
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  • From the Editor

    Page(s): 1125
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  • Chairman's Message

    Page(s): 1126
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  • Gyrosystem Analysis by Signal Flow Graph Techniques

    Page(s): 1127 - 1133
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    Equations for vector addition, vector cross products, and vector differentiation are represented in signal-flow-graph form, and are used to obtain signal flow graphs of the (tensor) equations of rotating rigid bodies. These signal flow graphs, in turn, are then applied to the analysis of several simple gyroscopic devices. View full abstract»

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  • Use of Saturable Cores in Linear Differential Transformers

    Page(s): 1134 - 1142
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    By proper design of windings and core, it is possible to operate a linear variable differential transformer with its core in a saturating condition. In this condition, its rectified output voltage is essentially independent of exciting current over a wide range thus avoiding the need for supply voltage regulation in many applications. Design considerations, performance characteristics and a means of reducing the variation of output with supply frequency are discussed. View full abstract»

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  • A Self-Programming Automatic Electronic Test System with Pattern Recognition Displays

    Page(s): 1143 - 1151
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    Employing a large number of optical and electrical input signals an automatic test system is proposed which rapidly samples the test data from an operating ensemble and which then displays the data in block form so that interpretation is made on the basis of pattern recognition. The display is via a cathode ray tube which is operated in a TV mode so that the displayed test data can be continuously and rapidly up-dated. By means of rear ports in the CRT it is shown how failure patterns can be recorded on film and preserved to make the test system self-programming, thereby overcoming one of the major obstacles in presently conceived automatic test systems. View full abstract»

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  • A Universal Data Processing System for the Mark 1 Aerospace Systems Environmental Chamber

    Page(s): 1152 - 1160
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    A data processing system, designed specifically to accommodate the vehicle instrumentation test requirements of a large environmental space simulation chamber is described. Prominent features of the system include a versatile input section capable of accepting FM/FM, PCM, PAM/PDM telemetry signals, and analog information; a stored program analog sequencer and telemetry decommutator: a data compressor; and an on-line computer. Primary emphasis in system design has been placed on flexibility and versatility. Reasons for this emphasis are presented with views on system utilization. View full abstract»

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  • Measurement Accuracy

    Page(s): 1161 - 1165
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    Measurement errors are discussed from a statistical viewpoint to form a basis for their consideration in measurement analyses. In particular, this paper (1) justifies the use of normal probabilitydensity distributions to describe measurement errors (2) derives expressions which describe the overall measurement error (3) examines the use of probability density distributions which view the true value as distributed about the measured value rather than the more conventional way of viewing the measured value as distributed about the true value (4) relates the conventional expression of measurement accuracy to the probability density distribution describing the measurement error and (5) discusses the numerical evaluation of measurement accuracy. View full abstract»

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  • Identifying the Presence of Destructive Interaction in Systems

    Page(s): 1166 - 1170
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    Two basic questions for aerospace reliability engineers are: a) are component failure rates estimated from systems tests coming from the same population of rates as those obtained when the components were not functioning in the "total systems" environment, and; b) if the populations are different, what are the phenomena whose presence are altering the population and how can they be operationally controlled? In this paper the concept of destructive interaction as a stochastic process is introduced. A method is developed for concluding whether or not it is reasonable to suppose that destructive interaction is present in a functioning system and to estimate the intensity of the process. A procedure for incorporating interaction processes into system simulations is then discussed. The relationship between interaction processes and the independence assumption of component operation is analyzed. View full abstract»

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  • Free Running-Switching Mode Power Regulator: Analysis and Design

    Page(s): 1171 - 1180
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    Nonlinear servo analysis is applied to a free running regulator. Steady state performance is determined using a modified sinusoidal describing function approach. Gain-phase plots provide a graphical analog. Transient analysis is accomplished using phase plane techniques. Complete analysis - steady state and transient -- is performed for a basic regulator and for an active output filter version. Results are applicable to specific requirements. View full abstract»

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  • Four-Square-Coil Systems for the Magnetic Testing of Spacecraft

    Page(s): 1181 - 1186
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    In the magnetic simulation of space for the testing of spacecraft, a system of four square coils has structural advantages over the more usual circular coils especially for very large coil systems. Theoretical expressions and computed results are presented for the parameters of the possible four-square-coil systems, particularly for the practical ones having integral turns-ratios. Contours of flux density for the system having unity turns-ratio indicate the degree of circumferential variation present. View full abstract»

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  • About the authors

    Page(s): 1187 - 1188
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  • The Institute of Electrical and Electronic Engineers Aerospace Group Constitution

    Page(s): 1189 - 1191
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  • IEEE Aerospace Group Organization & Activities

    Page(s): 1192 - 1199
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  • Affiliate Membership Information

    Page(s): 1200
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  • Proceedings Available - First International Congress on Instrumentation in Aerospace Simulation Facilities 28-29 September - Paris, France

    Page(s): 1200-a
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  • Information for authors

    Page(s): 1200a
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  • 1965 Aerospace Technical Conference and Exhibit

    Page(s): 1200b
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Aims & Scope

This Transactions ceased publication in 1965. The new retitled publication is IEEE Transactions on Aerospace and Electronic Systems.

Full Aims & Scope