CAJ | 학술논문

为使两轴周视光电探测系统在三自由度扰动和大像旋条件下搜索并跟踪水面目标,在虚拟天际线焦平面像五自由度解析表达式基础上,推导出以目标像点和像旋中心线距离作为补偿截距的周视大像旋稳海天线方位截距补偿算法.通过对补偿截距与系统焦距的比值求反正切函数得到补偿角的绝对值,将目标像点和像旋中心点坐标转换到方位旋转坐标系下,并以转换后二者横坐标的代数差正负号作为补偿量的符号判据.该算法是在存在非线性大角度像旋情况下使目标像点逼近像旋中心线,与俯仰机构的向量角补偿算法联动能够使目标像点始终逼近焦平面原点.数学模型仿真验证了单次补偿能够将残差减小到1%左右,真实工况试验也验证了方位截距补偿算法的合理性.
위사량축주시광전탐측계통재삼자유도우동화대상선조건하수색병근종수면목표,재허의천제선초평면상오자유도해석표체식기출상,추도출이목표상점화상선중심선거리작위보상절거적주시대상선은해천선방위절거보상산법.통과대보상절거여계통초거적비치구반정절함수득도보상각적절대치,장목표상점화상선중심점좌표전환도방위선전좌표계하,병이전환후이자횡좌표적대수차정부호작위보상량적부호판거.해산법시재존재비선성대각도상선정황하사목표상점핍근상선중심선,여부앙궤구적향량각보상산법련동능구사목표상점시종핍근초평면원점.수학모형방진험증료단차보상능구장잔차감소도1%좌우,진실공황시험야험증료방위절거보상산법적합이성.
For a panoramic optoelectronic detecting system to compensate three disturbances to track offshore targets by azimuth and pitching axes, based on a five dimensional analytical expression for a image line projected on focal plane, a compensation algorithm for azimuth intercept of panoramic image rotation stabilizing sea-sky line, which takes target point and image rotation centerline as the compensation intercept, is derived. The absolute value of the compensation angle is obtained by extracting the arc tangent function for the ratio of the compensation intercept and system focal length. The coordinators of the target image point and image rotation center point is converted into the coordinator of azimuth rotation. The algebraic difference sign for the abscissa of the two points is taken as the sign criterion of the compensation dosage. The algorithm allows the target image point to approach to the image rotation centerline in the case of the nonlinear large-angle image rotation, and always approach to the original point on the focal plane in combination with the compensation algorithm of the vectorial angle for the pitching mechanism. The simulation of the mathematical model shows that a single compensation can reduce the residual by a factor of 1%. The reasonableness of the compensation algorithm for azimuth intercept was proved by an actual condition test.