基于互相关碰撞强度谱的航天器碰撞定位技术

在针对空间碎片碰撞事件的碰撞定位技术中，传统方法是根据不同位置的碰撞信号到达时间差进行定位。对于加筋板而言，由于受到加强筋对信号的反射及衰减影响，采用传统定位方法无法实现准确定位。为解决上述问题，提出一种基于互相关碰撞强度谱的碰撞定位方法。该方法使用不同传感器之间的互相关系数曲线计算被测试件各位置的碰撞强度，构成碰撞强度谱，再通过查找碰撞强度谱中的最大值进行碰撞定位。为验证该方法的定位效果，共选取8个传感器13个实验点进行碰撞实验。结果证明该方法能够实现加筋板中的碰撞定位，通过选取适当滤波频带，平均定位误差最小为4.22 cm，满足航天器碎片碰撞定位应用需求。

Impact positioning based on cross-correlation impact intensity map for spacecraft

Among the impact positioning technologies in dealing with the space debris impacts, the traditional method is based on the arrival time difference of the impact signals at different positions to locate the impact point. However, for a stiffened plate, there inevitably will be the reflection and the attenuation of the signals, so, it is hard to achieve a high accuracy positioning. To solve this problem, we propose a novel impact positioning method based on the cross-correlation impact intensity map. In this method, the cross-correlation coefficient curves of different sensors are used to calculate the impact intensities of each experimental point on the test plate to form an impact intensity map. The impact point can be located based on the maximum value in the map. To verify the reliability of the method, a series of experiments are conducted with eight detectors and covering thirteen test points. It is shown that with this method, the impact location on a stiffened plate can be determined; with a proper filter band, the average location error is as small as 4.22 cm.