The LISA Pathfinder mission was flown to test some key technologies for the in-flight detection of gravitational waves. The mechanism developed to initialise the science phase, releasing the test mass into a geodesic trajectory, produced unexpected test mass states, requiring dedicated in-flight and on-ground test campaigns. Due to the limited information available from the telemetry, the analysis of the results required a combination of experimental and analytical approaches. A dynamic model of the release mechanism, integrated by an impact model, is developed to explain the in-flight test results. The proposed interpretation of the mechanism anomalies may provide useful guidelines for the design and development of the flight units for the forthcoming LISA mission.

LISA探路者飞行任务是为了测试飞行中引力波探测的一些关键技术。为初始化科学阶段而开发的机制，将测试质量释放到测地轨迹中，产生了意想不到的测试质量状态，需要专门的飞行和地面测试活动。由于遥测可用的信息有限，结果分析需要结合实验和分析方法。开发了由撞击模型集成的释放机制的动态模型来解释飞行中的测试结果。对机制异常的拟议解释可能为即将到来的 LISA 任务的飞行单元的设计和开发提供有用的指导。