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,推导出焦平面坐标系铅直轴的方向向量和该坐标系下海天出射平面法向量夹角的余弦表达式.该式求反余弦后减π/2,得到焦平面铅直坐标轴的方向向量和海天出射平面法向量小于π/2的夹角,该夹角的0.5倍作为俯仰反射镜的净作动量,目的是克服非线性像旋使包含目标信息的虚拟海天线的像线通过焦平面中心.该算法与方位补偿算法联动能够使目标像点始终逼近焦平面原点.通过数学模型仿真和真实工况试验都验证了俯仰机构位置环海天线向量角补偿算法的合理性.
위사량축주시광전탐측계통재삼자유도우동화대상선조건하수색병근종수면목표,재허의천제선초평면상오자유도해석표체식기출상,추도출초평면좌표계연직축적방향향량화해좌표계하해천출사평면법향량협각적여현표체식.해식구반여현후감π/2,득도초평면연직좌표축적방향향량화해천출사평면법향량소우π/2적협각,해협각적0.5배작위부앙반사경적정작동량,목적시극복비선성상선사포함목표신식적허의해천선적상선통과초평면중심.해산법여방위보상산법련동능구사목표상점시종핍근초평면원점.통과수학모형방진화진실공황시험도험증료부앙궤구위치배해천선향량각보상산법적합이성.
The direction vector of vertical axis of focal plane reference frame and analytical expression in cosine of a vector included angle measured from normal line for catoptric plane of a suppositional horizon outgoing plane were derived based on the five degrees of freedom analytical expression for a image line projected on focal plane to track the targets on sea surface by the panoramic photoelectric detecting system with both azimuth and pitching axes under the condition of three-frame disturbances and panoramic rotating image. The angle included between the direction vector of vertical axis of focal plane reference frame and the normal line of a suppositional horizon outgoing plane, which is less than π/2, was acquired by subtracting π/2 from arc cosine. The value from included angle multiplying 0.5 is taken as the static momentum of pitching reflector, which is a kernel of pitching position tracking algorithm adapting to arbitrary rotating angle for image line. In combination with the azimuth compensating algorithm (non-dissertated in this paper), the tracking algorithm can make the image points of offshore targets to approximate to the original point of the focal plane from the beginning to the end. Simulation results and engineering test validate the algorithm.