CAJ | 학술논문

舰炮火控雷达跟踪精度试验时需要确定跟踪数据的采样时间间隔 ,采样时间间隔主要取决于雷达跟踪误差特性的自相关时间.数据采样时间间隔直接影响试验航次数的确定和试验效率.从基础自相关估计理论出发 ,给出通过协方差函数直接计算和利用FFT变换计算雷达误差自相关时间方法 ,实测数据结果验证了火控雷达误差数据序列的平稳性 ;分析得到了火控雷达对典型目标的跟踪误差弱相关时间并给出雷达精度试验对空中目标数据采样时间间隔先按距离和方位角弱相关系数 K值确定 ,即1~2s,数据处理时再对高低角误差数据进行取2~3倍间隔的建议.通过自相关时间分析发现雷达伺服系统对消舰艇摇摆存在剩余的技术问题 ,有助于雷达技术改进和跟踪误差源分析.
함포화공뢰체근종정도시험시수요학정근종수거적채양시간간격 ,채양시간간격주요취결우뢰체근종오차특성적자상관시간.수거채양시간간격직접영향시험항차수적학정화시험효솔.종기출자상관고계이론출발 ,급출통과협방차함수직접계산화이용FFT변환계산뢰체오차자상관시간방법 ,실측수거결과험증료화공뢰체오차수거서렬적평은성 ;분석득도료화공뢰체대전형목표적근종오차약상관시간병급출뢰체정도시험대공중목표수거채양시간간격선안거리화방위각약상관계수 K치학정 ,즉1~2s,수거처리시재대고저각오차수거진행취2~3배간격적건의.통과자상관시간분석발현뢰체사복계통대소함정요파존재잉여적기술문제 ,유조우뢰체기술개진화근종오차원분석.
Determing sampling time interval of tracking data is the basic work of naval gun fire control radar in tracking precision experiment ,w hich chiefly depends on autocorrelation time of radar tracking error character .Sampling time in-terval has direct influence on test voyages and test efficiency .Based on the basic theory of autocorrelation estimate , methods of calculating autocorrelation time of radar ,including covariance function and FFT transform are presented , combined with engineering application ,some experimental results are also analyzed ,which verify that error data se-quence of fire control radar is stationary .The weak correlation time of radar tracking error for typical targets was ana-lyzed ,sampling time interval of aerial target according to weak correlation coefficient of range and azimuth angle K was made with 1 to 2 seconds ,and 2 to 3 times interval of elevation angle suggestion during data processing was made as well .The autocorrelation analysis results show that radar servo system has cancellation residue towards warship rolling ;w hich has certain guidance in improving radar techniques and analyzing tracking error sources in the future .