Analysis of Aircraft Navigation Control Performance Improvement Based on Antenna Sideband DVOR Model 432
Keywords:
DVOR, Doppler effect, Sideband Antenna, Air Navigation, Model 432.Abstract
This study discusses the analysis of improving the performance of the Doppler Very High Frequency Omni-Directional Radio Range (DVOR) model 432-based aircraft navigation control system. The DVOR system functions to provide directional information (azimuth) to the aircraft by utilizing the Doppler effect resulting from the rotation of the sideband antenna. The purpose of this study is to analyze the influence of the angle of arrival of the aircraft (θ) on the change in the frequency of the received signal and to evaluate the stability of the DVOR system model 432 in providing accurate navigation data. The test results showed that the change in the angle of arrival of the aircraft had an effect on the frequency shift due to the Doppler effect, with frequency values in the range of 112,299,592 Hz to 112,299,600 Hz and an average of 112,299,595 Hz. This value showed excellent transmission stability with fluctuations of only about ±5 Hz. The system with 49 sideband antennas was able to produce fine variable signals and minimize reflection interference (multipath reflection). The analysis results also show the direction of the Omni Bearing Selector (OBS) of 187°, which describes the aircraft's position against the DVOR station with an accuracy level below 1°. Overall, the DVOR model 432 has high accuracy, good frequency stability, and reliable performance, making it still relevant to be used as a modern air navigation aid system despite the development of satellite technology such as GPS.
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