atr-72气象雷达的故障分析与排除（Fault analysis and elimination of ATR-72 weather radar）.docVIP

atr-72气象雷达的故障分析与排除（Fault analysis and elimination of ATR-72 weather radar） Xinjiang branch of China Southern Airlines maintenance base Li Wanxi Yin Keqiang The basic principle of weather radar The weather radar antenna through continuous sweep to the front of the aircraft and its powerful radiation power sector on both sides of the radar pulse signal, and receives the radar echo generated by water and other meteorological rainfall area target. The echo signal in radar receiver and display through the complex processing, ultimately to the target image in the form of display. Under normal circumstances, whether the aircraft is flying or a certain pitch angle or inclination, weather radar display provides always flying target height and horizontal position distribution pattern is in parallel with the plane. The weather radar system in general by the transceiver, antenna, control box, monitor etc.. Weather radar transceiver has the following features: the internal circuit transmitting circuit, receiving circuit, receiving circuit, power supply circuit, switch monitoring circuit, antenna stabilization amplifier circuit. Weather radar antenna from the structure can be divided into two parts: the base antenna for radiating and receiving antenna of radar signal and control part of the antenna motion. The composition and connection two, ATR-72 weather radar system ATR-72 weather radar system by the transceiver and antenna, control box, waveguide components, components and systems related with SGU No. 1 and No. 2 and No. 1 AHRU SGU. X band electromagnetic wave signal from the transceiver through the waveguide antenna radiation was sent out, echo signal received at the antenna from the waveguide to the transceiver inside. The internal transceiver receiving circuit of echo signal processing to generate the 2 road weather information signal, the two signals were sent to SGU No. 1 and No. 2 SGU. The transceiver and the No. 1 AHRU connected, receiving signals from the attitude of