SOFTWARE METHODS FOR INCREASING THE RELIABILITY OF AERODROME QUASI-DOPPLER AUTOMATIC RADIO DIRECTION FINDERS

 Objectives To develop software methods that can improve the reliability of airfield quasi-Doppler automatic direction finders (ADFs).

Method. Mathematical models and algorithms of software fault recovery of aerodrome quasi-Doppler automatic radio direction finders were developed. It is proposed to change the structure of aerodrome quasi-Doppler automatic radio direction finders.

Results. Methods and algorithms for software improvement of the reliability of airfield quasi-Doppler automatic direction finders are proposed. A novel structural organisation of airfield quasi-Doppler automatic radio direction finders is given. New software methods are proposed for ensuring ADF operability in the event of a failure of the antenna system vibrators, both with the use of phase relations from any two pairs of orthogonally arranged ring antenna vibrators and with the use of the combinatorial method. The proposed organisational ADF scheme allows the average operating time per failure of one direction-finding channel to be increased by 4.4 times.

Conclusion. The developed methods for ensuring ADF operability in the event of a failure of antenna system vibrators enable a simultaneous calculation of the azimuth and angle of position on the radio emission source. The use of the proposed method increases the potential reliability of airfield quasi-Doppler automatic direction finders without any hardware costs, as well as ensuring the adequacy of the calculated instrumental error values of airfield quasi-Doppler automatic direction finders relative to the real ones. 

1. Aslanov G.K. Avtoreferat dissertatsii na soiskaniye uchenoy stepeni doktora tekhnicheskikh nauk na temu: "Prikladnyye metody obespecheniya tochnostnykh kharakteristik ARP i ARPS". Moskovskiy gosudar-stvennyy tekhnicheskiy universitet grazhdanskoy aviatsii. Moskva 1998g. [Aslanov G.K. Abstract of dissertation for the degree of Doctor of Technical Sciences on the topic: "Applied methods to ensure the accuracy characteristics of ARP and ARPS." Moscow State Technical University of Civil Aviation. Moscow 1998. (In Russ)]

2. Aslanov G.K., Gasanov O.I. Analiz prichin vozniknoveniya anomal'nykh oshibok v kvazidoplerovskikh avtomaticheskikh radiopelengatorakh // Nauchno-tekhnicheskiye vedomosti SPbGPU, seriya Informatika Telekommunikatsii Upravleniye, №2. SPb: 2009. [Aslanov G.K., Hasanov O.I. Analysis of the causes of abnormal errors in quasi-Doppler automatic direction finders // Scientific and Technical Journal of St. Petersburg State Polytechnic University, Series Informatics Telecommunications Management, No. 2. SPb: 2009. (In Russ)]

3. Aslanov G.K., Gasanov O.I. Vykhod iz stroya elementov antennoy sistemy ARP kak prichina vozniknoveniya anomal'noy oshibki pelengovaniya // Sbornik tezisov dokladov XXX itogovoy nauchno-tekhnicheskoy konferentsii prepodavateley, sotrudnikov, aspirantov i studentov DGTU: tezisy dokladov. Chast' I. Tekhnicheskiye nauki – Makhachkala: DGTU, 2009. [Aslanov G.K., Hasanov O.I. Failure of elements of the ARP antenna system as the cause of an abnormal direction finding error // Collection of abstracts of the XXX final scientific and technical conference of teachers, employees, graduate students and students of DSTU: abstracts. Part I. Technical sciences - Makhachkala: DSTU, 2009. (In Russ)]

4. Aslanov G.K., Gasanov O.I. Analiz oshibok avtomaticheskikh radiopelengatorov, vyzyvayemykh vy-khodom iz stroya elementov antennoy sistemy // Vestnik Dagestanskogo gosudarstvennogo tekhnicheskogo uni-versiteta. Tekhnicheskiye nauki. – 2008. - №11. [Aslanov G.K., Hasanov O.I. Error analysis of automatic direction finders caused by the failure of the antenna system elements // Herald of the Daghestan State Technical University. Technical science. 2008. No. 11. pp. 91-96. (In Russ)]

5. Aslanov G.K., Gasanov O.I. Uluchsheniye tekhnicheskikh kharakteristik ARP, putem yego intellektualizatsii // Sovremennyye informatsionnyye tekhnologii v proyektirovanii, upravlenii i ekonomike: materialy IV Vserossiyskoy konferentsii po aktual'nym problemam vnedreniya i razvitiya sektora IT-tekhnologiy, 22-25 sent. 2009 g. - Makhachkala: DGTU, 2009. [Aslanov G.K., Hasanov O.I. Improving the technical characteristics of ARPs through its intellectualization // Modern Information Technologies in Design, Management and Economics: Proceedings of the IV All-Russian Conference on Actual Problems of Implementation and Development of the IT-Technology Sector, September 22-25. 2009 - Makhachkala: DSTU, 2009. (In Russ)]

6. Aslanov G.K., Aslanov T.G., Kazibekov R.B.,.Tetakayev U.R. Otsenka oshibok, vyzyvayemykh vykhodom iz stroya elementov antennoy sistemy aerodromnogo avtomaticheskogo radiopelengatora // Vestnik Dagestanskogo tekhnicheskogo universiteta. Tekhnicheskiye nauki 2018; 45(2) :94-103. https://doi.org/10.21822/2073-6185-2018-45-2-94-103 [Aslanov G.K., Aslanov T.G., Kazibekov R.B.,. Tetakaev U.R. Evaluation of errors caused by the failure of the elements of the antenna system of an airfield automatic direction finder // Bulletin of the Dagestan Technical University. Engineering 2018; 45(2) :94-103. https://doi.org/10.21822/2073-6185-2018-45-2-94-103. (In Russ)]

7. Aslanov G.K., Kazibekov R.B., Tetakayev U.R.. Ob odnom metode obespecheniya rabotosposobnosti fazovykh avtomaticheskikh radiopelengatorov pri neispravnykh vibratorakh antennoy sistemy // Molodezh', nauka, innovatsii»: Materialy II Vserossiyskoy nauchno-prakticheskoy konferentsii. – Groznyy: GGNTU imeni akademika M.D. Millionshchikova, 2013. [Aslanov G.K, Kazibekov R.B., Tetakaev U.R. On a method for ensuring the operability of phase automatic direction finders with faulty vibrators of the antenna system // Youth, Science, Innovation ”: Materials of the II All-Russian Scientific and Practical Conference. - Terrible: GSTU named after academician M.D. Millionschikova, 2013. (In Russ)]

8. Kazibekov, R.B. Obespecheniye rabotosposobnosti aerodromnykh avtomaticheskikh radiopelengato-rov pri neispravnoy antennoy sisteme // Mezhd. sb. nauch. tr. «Smart IT», 2014. [Kazibekov R.B. Ensuring the operability of airfield automatic direction finders with a faulty antenna system // Int. Sat scientific tr Smart IT, 2014. (In Russ)]

9. Korn G., Korn T. Spravochnik po matematike (dlya nauchnykh rabotnikov i inzhenerov). M.: Nauka, 1977. [Korn G., Korn T. Handbook of mathematics (for scientists and engineers). M .: Nauka, 1977. (In Russ)]

10. Kukes I.S., Starik M.Ye. Osnovy radiopelengatsii. M., "Sov. radio",1964. [Kukes I.S., Old man M.E. Basics of direction finding. M., "Sov. Radio", 1964. (In Russ)]

11. Saidov A.S., Tagilayev A.R., Aliyev N.M., Aslanov G.K. Proyektirovaniye fazovykh avtomaticheskikh radiopelngatorov. Moskva, Radio i svyaz', 1997. [Saidov A.S., Tagilaev A.R., Aliev N.M., Aslanov G.K. Design of phase automatic radio panglers. Moscow, Radio and Communications, 1997. (In Russ)]

12. Tetakayev U.R., Kazibekov R.B. Razresheniya fazovoy neodnoznachnosti metodom kombinatoriki / // Sbornik tezisov dokladov XXKHVI itogovoy nauchno-tekhnicheskoy konferentsii prepodavateley, sotrudni-kov, aspirantov i studentov DGTU, 21-25 aprelya 2015. – Makhachkala: DGTU, 2015. [Tetakaev U.R., Kazibekov R.B. Resolutions of phase ambiguity by the combinatorics method // Collection of abstracts of reports XXXVI of the final scientific and technical conference of teachers, employees, graduate students and students of DGTU, April 21-25, 2015. Makhachkala: DGTU, 2015. (In Russ)]

13. Tetakayev U.R., Kazibekov R.B., Mirzabekov T.M., Shikhmagomedova R.F. Povysheniye nadezhnosti avtomaticheskogo radiopelengatora za schet optimizatsii vremeni nakopleniya informatsii v zavisimosti ot urovnya pelenguyemogo signala //Sbornik tezisov dokladov XXKHVIII itogovoy nauchno-tekhnicheskoy konfe-rentsii prepodavateley, sotrudnikov, aspirantov i studentov DGTU, 17-22 apr. 2017. Makhachkala: DGTU, 2017. [Tetakaev U.R., Kazibekov R.B., Mirzabekov T.M., Shikhmagomedova R.F. Improving the reliability of the automatic direction-finder by optimizing the accumulation time of information depending on the level of the direction-finding signal // Collection of abstracts XXXVIII of the final scientific and technical conference of teachers, employees, graduate students and students of DSTU, April 17-22. 2017. Makhachkala: DSTU, 2017.

14. Direction finding of narrowband autoregressive sources by antenna arrays / Ziskind Ilan, Bar-Ness Yeheskel // Antennas and Propag .: Int. Symp Dig. "Merg. Technol. 90's", Dallas, Tex., May 7-11, 1990. Vol. 4. Piscataway (N.J.), 1990.

15. Direction-of-arrival estimation for narrow band coherent and incoherent sources in the presence of un-known noise fields / Wang Fengzhen // Res. IEEE Int. Radar Conf., Arlington, Va., May 7-10, 1990. New York (N. Y.), 1990.

16. Johnson, J .: R&S direction finders for Her Majesty's Coastguard. News from Rohde & Schwarz (1985) No.109, pp. 36-37.

17. Mutual coupling effects on phase-only direction finding / Weiss Anthony J., Friedlander Benjamin // IEEE.Trans. Antennas and Propag. 1992. Vol. 40, N5.

18. Performance analysis of direction finding using lag redundancy averaging / Doron Miriam A., Weiss Anthony J., // IEEE Trans. Signal Process. - 1993 . 41, No. 3. 15. Precision DF safeguards North-Sea shipping. News from Rohde & Schwarz (1985) No.109, pp. 35-36.

19. F. Quint, J. Reichert and H. Roos. Emitter Detection and Tracking Algorithm for a Wide Band Multichannel. Direction-Finding System in the HF-Band. Proc. MILCOM 1999, vol. 1, pp. 212-216. 1999.

20. A. Chemarov, "The Signal Detection / Direction Finding Algorithm in a Wide Simultaneous Scan Band", 8th International Symposium on Electromagnetic Compatibility and Electromagnetic Ecology, EMC-2009, pp. 71-74, St.Petersburg, Russia, June 16-19, 2009.

21. Direction-of-arrival estimation for narrow band coherent and incoherent sources in the presence of unknown noise fields / Wang Fengzhen // Res. IEEE Int. Radar Conf., Arlington, Va., May 7-10, 1990. New York (N. Y.), 1990.

22. . Unsett U. VHF Direction Finders control shipping in North Sea and Atlantic. News from Rohde & Schwarz (1989) No.124, pp. 36 - 37.