MEMS激光雷达测量下的航天器隐藏目标点测量

MEMS laser radar measurement of spacecraft hidden target point measurement

摘要:

为具有指向性的发掘航天器行驶轨迹中的隐藏节点，根据企特征进行准确测量，提出一种基于MEMS激光雷达测量技术的航天器隐藏目标点测量方法。利用离散型雷达滤波器，采集激光测量过程中的上机位数据，进而获取雷达测量性能指标，促进指向性测量系数的适度下降。在此基础上，借助航天器目标的运动特性条件，估计特征值的最大似然量，再联合相关测量指标，建立航天器目标的特征模型，对目标点微动频率的下降趋势进行抑制。利用隐藏目标的立体视觉处理结果，选择最适合MEMS激光雷达的测量点，并以此为条件，测算航天器隐藏目标的比例情况，完成MEMS激光雷达测量下航天器隐藏目标点测量方法的建立。在RCS平台中模拟航天器行驶轨迹，随着MEMS激光雷达测量技术的应用，目标点微动频率提升、指向性测量系数下降，隐藏目标节点得到有效测量。

Abstract:

In order to explore the hidden nodes in the trajectory of the spacecraft with directivity, according to the characteristics of the enterprise, an adaptive measurement method for spacecraft hidden target points based on MEMS lidar measurement technology is proposed. The discrete radar filter is used to collect the upper position data in the laser measurement process, and then the radar measurement performance index is obtained to promote the moderate decline of the directivity measurement coefficient. On this basis, based on the motion characteristics of the spacecraft target, the maximum likelihood of the eigenvalues ??is estimated, and then the relevant measurement indicators are combined to establish the feature model of the spacecraft target, which suppresses the downward trend of the target point fretting frequency. Using the stereo vision processing results of hidden targets, the measurement points most suitable for MEMS laser radar are selected, and the proportion of hidden targets of spacecraft is measured under the condition of this, and the measurement method of hidden target points of spacecraft under MEMS lidar measurement is completed. The spacecraft trajectory is simulated in the RCS platform. With the application of MEMS lidar measurement technology, the target point fretting frequency is increased, the directivity measurement coefficient is decreased, and the hidden target node is effectively measured.