Line-of-Sight Control in Airborne Radar Reconnaissance System
碩士 === 國立交通大學 === 機械工程系所 === 94 === Radar is a device of using electromagnetic waves to detect the presence of the target and extract its location and relative velocity. The airborne radar deviates from its predicted trajectory by pilot-induced maneuvers, atmospheric gusts disturbance and structural...
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| Format: | Others |
| Language: | en_US |
| Published: |
2006
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| Online Access: | http://ndltd.ncl.edu.tw/handle/66068451020045522697 |
| Summary: | 碩士 === 國立交通大學 === 機械工程系所 === 94 === Radar is a device of using electromagnetic waves to detect the presence of the target and extract its location and relative velocity. The airborne radar deviates from its predicted trajectory by pilot-induced maneuvers, atmospheric gusts disturbance and structural vibrations, and will decrease the detection efficiency of radar. In order to improve the problem, we have to compensate the motion uncertainty of aircraft and correct the motion deviation of radar. The purpose of the thesis is to implement the antenna stabilization system of airborne radar. By setting up a two-axis gimbal mechanism on the antenna pedestal, we can compensate the changing attitudes of aircraft and stabilize the antenna line-of-sight in a designated earth-fixed location. Algorithm used for line-of-sight control generates commands to stabilize and point antenna. The gyroscope and encoders are taken as the sensors of feedback signals in this system. PID controller is developed to minimize tracking error and improve system performance.
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