SYSTEM AND METHOD OF AIRCRAFT AUTOMATIC LANDING Russian patent published in 2012 - IPC B64D45/04 

FIELD: transport.

SUBSTANCE: set of invention relates to aircraft automatic landing systems. Proposed method comprises emitting signals by arrays to on-course and glide-path beacons (CB, GB) to be received by onboard on-course and glide-path radio receivers (CR, GR). Every array transmits two signals in carrier frequency ω that differs for CB and GB. One signal is not modulated while another one is phase-modulated by sine signal with frequency Ω. First antenna receives signal by first receiver of every CR and GR, amplifies it and, after detection by square detector, said signal is fed to filter input. Filter isolates harmonic with frequency Ω and angular amplitude. Obtained signal is fed to first input of sync detector that generates signal of departure from course-glide path. Reference signal of frequency Ω for sync detectors of CR and GR is emitted by separate antenna located on surface. Said signal of departure from course-glide path is transmitted to aircraft ACS and to departure indicator. CB and GB of proposed system consist of oscillator, phase inverter, phase modulator, reference carrier oscillator, reference frequency generator, reference signal modulator, transmitting antenna power amplifiers. CR and GR consist of receiving antennas, receivers, AGC, square detector, filter, sync detector, reference signal detector and AGC.

EFFECT: higher reliability.

2 cl, 4 dwg