一种航天器舱壁加筋结构泄漏定位方法

A Leak Location Method of Spacecraft Stiffened Structure

针对航天器舱体复杂加筋板结构泄漏定位问题,文章提出了一种基于声学原理的泄漏定位方法。使用声阵列传感器接收泄漏声波,并通过不同频段过筋系数加权波束形成算法实现加强筋内泄漏定位。针对空间站典型加筋板结构,搭建试验平台,对加强筋前后泄漏声波的时域及频域特征进行了分析,计算得到距离补偿过筋系数权重因子矩阵,并开展泄漏定位试验验证。结果表明:这种方法比传统的波束形成法定位误差减小19.4%,定位准确率提高13.3%,可为我国航天器在轨泄漏检测提供参考。

In order to solve the problem of leak location in the complex stiffened plate structure of spacecraft, a leak location method based on acoustic principle is proposed in the paper. In this method, the acoustic array sensors are used to receive leak sound wave, and leak location is made by the beam forming algorithm based on transmission coefficient weighting of leak sound wave passing through the stiffener. Taking the typical stiffened plate structure of space station as the research subject, an experiment platform is set up. By analyzing characteristics of leak waves before and after the stiffener in both time-domain and frequency-domain, this paper proposes the weight factor matrix of distance compensated stiffener coefficient. A leak location test is carried out and the results show that the location error decreases 19.4% and the accuracy increases 13.3% comparing with tradition beam forming method. This method can provide some helpful suggestions about leak detecting of spacecraft in orbit.