MPM 20 MAGNETIC AURA RESEARCH AND ITS UTILIZATION FOR MPM 20 SITUATIONAL CONTROL by ProQuest

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									                                                                                               Science & Military 2/2009




  MPM 20 MAGNETIC AURA RESEARCH AND ITS UTILIZATION FOR MPM 20
                     SITUATIONAL CONTROL
                            Jana MODROVIČOVÁ, Ladislav MADARÁSZ, Ján KABÁT

Abstract: This article is aimed at in-depth research and experimental confirmation of aircraft turbojet engines magnetic aura
existence, more exactly magnetic aura of small turbojet engine MPM 20. MPM 20 magnetic aura is one of its important
properties and its utilization possibilities for control purpose until now aren't closely explored. Worked article contains
motives and references of its utilization for MPM 20 situational control methodical application.

Keywords: MPM 20, magnetic aura, measurement, cross-section.


1 INTRODUCTION                                                    aura examination and its relation to engine
                                                                  revolutions. Measurements were executed on built
    Magnetism is a physical property, but also some               measuring construction by 4-channel magnetometer,
kind of physical performance of some particles as                 revolution counter and compressor, which was used
well as objects. Often magnetism serves for early                 for the crank up of the engine. Mentioned
mechanic defect detection of observed objects.                    magnetometer is more detailed described in
Small turbojet engine MPM 20 is observed object                   [2,3,5,6].
and has its own magnetism which is called MPM 20
magnetic aura. In more details, magnetic aura is                  2 MEASURING CHAIN
described in [7,8,9].
    This article is concerned with small turbojets                   As was already mentioned before in introduction,
engine MPM 20 magnetic aura next research and                     created measuring chain was composed of wooden
possibilities in design of situational control based on           construction on which, the motor was placed, and of
its magnetic aura. Previous measurements as well as               wooden frame with 4 probes of magnetometer
their results can be found in [7,8]. Measurements                 placed on it. Probes were rotated by 90° each.
described in this article are focused on magnetic                 Sketch of probes placement is shown in Figure 1.




                                                         4



                                        3                5                1

                                                                                Wooden frame for probes placement
                                                         2



                                  Figure 1 Schematics of wooden frame for probes fixing
                                             and placement (cross-section)

Legend: 1 – probe of magnetometer No.1 placed in horizontal plain,
        2 – probe of magnetometer No.2 placed in vertical plain,
        3 – probe of magnetometer No.3 placed in horizontal plain,
        4 – probe of magnetometer No.4 placed in vertical plain,
        5 – cross-section of MPM 20 engine.

   In next figure, described construction can be seen


								
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