合成孔徑雷達(dá)要得到高分辨率的成像,必須保證天線波束指向恒定。本文以DSP 為核心構(gòu)造天線平臺(tái)數(shù)字控制系統(tǒng)來(lái)對(duì)大氣擾動(dòng)造成的雷達(dá)載體的角運(yùn)動(dòng)進(jìn)行補(bǔ)償，當(dāng)雷達(dá)載體在方位向、橫滾向及俯仰向發(fā)生角運(yùn)動(dòng)時(shí)，天線平臺(tái)數(shù)字控制系統(tǒng)控制平臺(tái)向相反方向轉(zhuǎn)動(dòng)，從而保證天線指向恒定，得到高分辨率的雷達(dá)圖像。
關(guān)鍵詞：雷達(dá)天線平臺(tái)；數(shù)字控制系統(tǒng)；DSP；角運(yùn)動(dòng)補(bǔ)償
Abstract: In order to obtain high resolution radar images, the antenna direction of SAR must be steady and precision. In this paper, with the DSP as the core, the digital control system of antenna platform can compensate the angle movement of the radar carrier due to the atmosphere interference. When radar carrier generates angle movement on the direction of drift, roll and pitch, the digital control system of antenna platform will drive the platform rotate reversely to guarantee the invariableness of the antenna direction and gain high resolution radar images.
Keywords: antenna platform of radar; digital control system; DSP; compensation of angle movement