CAJ | 학술논문

箔条、角反射器等质心干扰诱使雷达导引头目标指示角偏离目标，导致导弹脱靶。为了解决这一问题，该文利用目标与干扰极化状态的差异性，通过目标、干扰极化相位描述子构造出斜投影算子，然后采用斜投影处理来抑制雷达导引头质心干扰。鉴于实际中目标、干扰极化状态难以准确估计，重点分析了目标、干扰极化相位描述子估计误差对斜投影输出目标、干扰信号的影响，推导得到了斜投影输出目标、干扰信号误差解析表达式；在此基础上，进一步推导得到了斜投影输出干信比、单脉冲比误差与目标、干扰极化相位描述子估计误差之间的关系式。理论分析与仿真结果表明，斜投影处理后的雷达导引头测角误差与目标极化相位描述子估计误差无关，与干扰极化相位描述子估计误差有关；干扰极化相位描述子估计误差在-10度到10度范围内时，斜投影仍具有一定的干扰抑制能力，有助于提高导引头的测角精度。
박조、각반사기등질심간우유사뢰체도인두목표지시각편리목표，도치도탄탈파。위료해결저일문제，해문이용목표여간우겁화상태적차이성，통과목표、간우겁화상위묘술자구조출사투영산자，연후채용사투영처리래억제뢰체도인두질심간우。감우실제중목표、간우겁화상태난이준학고계，중점분석료목표、간우겁화상위묘술자고계오차대사투영수출목표、간우신호적영향，추도득도료사투영수출목표、간우신호오차해석표체식；재차기출상，진일보추도득도료사투영수출간신비、단맥충비오차여목표、간우겁화상위묘술자고계오차지간적관계식。이론분석여방진결과표명，사투영처리후적뢰체도인두측각오차여목표겁화상위묘술자고계오차무관，여간우겁화상위묘술자고계오차유관；간우겁화상위묘술자고계오차재-10도도10도범위내시，사투영잉구유일정적간우억제능력，유조우제고도인두적측각정도。
Target indicated angle of radar seeker biases off the target when the centroid jamming such as chaff cloud or cor-ner reflector presents ,which makes the missile miss the target .To address this problem ,oblique projection is employed to suppress the centroid jamming in this paper ,where oblique projection operator is constructed by utilizing the polarization parameters of the target and the jamming .Since the polarization parameters of the target and the jamming are difficult to be estimated accurately in re-ality ,influences of the estimation errors of the polarization parameters of the target and the jamming on the output target signal and jamming after oblique projection are mainly analyzed .Analytic expressions of output signal errors of the target and the jamming are presented .Based on this ,the output interference-to-signal ratio and angle measurement error after oblique projection are further de-rived .Theoretical derivation and simulation results both demonstrate that angle measurement error of radar seeker after oblique pro-jection is unrelated to the estimation error of the polarization parameters of the target ,and is related to the estimation error of the po-larization parameters for the jamming .Oblique projection can suppress the jamming to some extent and is good for enhancing the an-gle measurement accuracy of radar seeker if the estimation errors of the polarization parameters of the jamming are within the range of minus ten degree to ten degree .