载人航天器对接通道保压检漏方法

载人航天器对接后形成的对接通道是影响组合体密封性的关键环节，为保证航天员的安全，开舱门前需进行对接通道漏率检测。文章通过分析载人航天器对接通道特点，提出基于温度修正的保压检漏方法，并确定了在轨保压压力和检漏时间。文章还设计了地面模拟试验予以验证，结果表明该方法合理可行且精度较高。该保压检漏方法已在“天舟一号”飞行任务中成功应用，可以为后续空间站任务舱体检漏提供重要技术支撑。

Pressure-maintaining leak detection for manned spacecraft docking channel

The tightness of the docking channel formed after the docking of manned spacecrafts is essential for the sealing performance of the whole assembly. In order to ensure the safety of the astronauts, the leak rate detection of the docking channel is required before the hatch is opened. Based on the characteristics of the docking channel, a pressure-maintaining leak detection method is proposed with temperature corrections. This method determines the assumed maintaining pressure and the time for the leak detection, which is also validated by the ground simulation test. It is shown that this method is has applicable with an adequately high precision. The flight verification of this method in the Tiangong-I has provided the technical support for the leak detection in the following space station missions.