Crosstalk calculation in electric circuits of aircraft steering gear

Аuthors

Kirillov V. Y.^1*, Tomilin M. M.^2**

1. ,
2. Moscow Aviation Institute (National Research University), 4, Volokolamskoe shosse, Moscow, А-80, GSP-3, 125993, Russia

*e-mail: kaf309@mai.ru
**e-mail: emc@mai.ru

Abstract

Two types of electric drives — electro-mechanical or electro-hydrostatic — are supposed to be implemented for оnboard systems of “more electric aircraft” with a great number of various kinds of electrical equipment [1] for controlling various functional elements [2]. The increasing number of implemented electrical equipment, electro-mechanical steering gear in particular, which phase currents cause electromagnetic interference (EMI) in the form of electric and magnetic fields with high-level intensities. The main source of radiated EMI caused by electric drives systems are power circuits bundles. Electro-mechanic steering gear power circuits' bundles consist of a pair of twisted or axial conductors with currents' of tens of amps [5, 6]. Correspondingly, they generate radiated EMI, which may cause signal distortion in aircraft onboard system communication lines and, hence, deteriorate its functionality.

The presented study is dedicated to of radiated EMI levels in the form of magnetic field harmonic components computation. These EMI are generated by phase currents in aircraft electro-mechanical actuator motor powering circuits, and crosstalk in the form of voltages in open conductors of double-wire communication lines.

 The presented spacing charts allow deduce that voltages and currents, which amplitudes are commensurable or even greater than valid signals values, occur in aircraft onboard cable system communication lines in the form of harmonic electric and/or magnetic field. The charts allow determining the safe distances between power circuits and open communication lines, wherein the levels of induced conducted interferences are significantly lower than information and control signals peak values in aircraft onboard system communication lines. It allows provide electromagnetic compatibility of high-power and low-power circuits.

The presented paper is a part of the research work on computation and simulation of electromagnetic interferences, caused by transients in aircraft steering gear system.

⁠

Keywords:

aircraft, electro-mechanical drive, electromagnetic interference

References

1. Reznikov S.B., Bocharov V.V., Kharchenko I.A. Elektromagnitnaya i elektroenergeticheskaya sovmestimost' sistem elektrosnabzheniya i vtorichnykh istochnikov pitaniya polnostyu elektrifitsirovannykh samoletov (Electromagnetic and electric compatibility of power supply systems and secondary power sources of all-electrical aircraft), Moscow, MAI, 2014, 160 p.

2. Ermakov S.A., Sukhorukov R.V. Materialy konferentsii “Tekhnicheskie i programmnye sredstva sistem upravleniya, kontrolya i izmereniya”, Moscow, 2010, pp. 438449.

3. Kuz'michev R.V., Sitin D.A., Stepanov V.S. Trudy MAI, 2011, no. 45, available at: http://www.mai.ru/science/trudy/eng/published.php?ID=25426 (accessed 24.04.2016).

4. Ogoltsov I., Samsonovich S., Selivanov A., Alekseenkov A. New developments of electrically powered electrohydraulic and electromechanical actuators for the more electric aircraft. Proceedings of the 29th Congress of the International of the Aeronautical Sciences, St. Petersburg, Russia, September 7 — 12, 2014, available at: http://www.icas.org/ICAS_ARCHIVE/ICAS2014/data/alle.html

5. Kirillov V.Yu., Klykov A.V., Tomilin M.M. Vestnik Moskovskogo aviatsionnogo instituta, 2016, vol. 23, no. 2, pp. 175184.

6. Cadence PCB solutions, 2016, available at: http://www.orcad.com

7. Grodnev I.I., Sergeichuk K.Ya. Ekranirovanie apparatury i kabelei svyazi (Equipment and communications cables shielding), Moscow, Svyaz'izdat, 1960, 316 p.

8. Bulekov V.P. Elektromagnitnaya sovmestimost' tekhnicheskikh sredstv podvizhnykh ob''ektov (Electromagnetic compatibility of moving objects facilities), Moscow, MAI, 2004, 648 p.

9. Gainutdinov R.R., Chermoshentsev S.F. Vestnik Kazanskogo gosudarstvennogo tekhnicheskogo universiteta im. A.N. Tupoleva, 2014, no.3, pp. 200 — 208.

10. Kravchenko V.I., Bolotov E.A., Letunova N.I. Radioelektronnye sredstva i moshchnye elektromagnitnye pomekhi (Radioelectronic devices and high-power electromagnetic interferences), Moscow, Radio i svyaz', 1987, 256 p.