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Fotino: design, manufacturing, testing of the capsule of the second Young Engineers' Satellite

机译：Fotino：第二位青年工程师卫星胶囊的设计，制造，测试

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Fotino is the re-entry capsule of the Young Engineers' Satellite 2 tethered re-entry demonstration experiment SpaceMail. It is a re-entry capsule entirely designed by students and will fly on-board the Foton-M3 mission in September 2007. The Young Engineers' Satellite, is an ESA educational project that involves students from more than 20 countries. The 5 kg capsule's prime objective is demonstration of lightweight re-entry technology, entering a new regime of aerothermodynamics and recording its re-entry conditions. The simple spherical shape makes it ideal to verify theory and tests with flight results. Fotino carries about 1 kg payload for scientific measurements, including pressure sensors, thermocouples, magnetometers, gyroscopes, accelerometers and a GPS receiver. All the data will be stored in an internal FLASH memory and transmitted on UHF for redundancy. The recoverability of the capsule is ensured by a redundant location system (ARGOS beacon and UHF transmission) and a parachute system. The exceptionally low weight record has been reached thanks to the use of an innovative passive Thermal Protection System, like the rest of Fotino developed by university students. The TPS manufacturing is simple and opens possibilities for future low-cost re-entry missions. The whole capsule has gone through several testing campaigns, including drop tests, thermal tests, shaker table tests and plasma chamber tests, all in parallel with simulations thus proving the validity of the design and qualifying the capsule for the mission. This paper provides an overview of the capsule development, describing the design choices that made the capsule possible, together with the manufacturing and the testing results.
机译：Fotino是“年轻工程师”卫星2系留式再入演示实验SpaceMail的再入舱。这是一个完全由学生设计的重入太空舱，将于2007年9月登上Foton-M3任务。年轻工程师卫星计划是一项ESA教育项目，涉及来自20多个国家的学生。 5公斤胶囊的主要目的是展示轻巧的再入技术，进入一种新的空气热力学状态并记录其再入条件。简单的球形使其成为验证理论和飞行结果的理想选择。 Fotino承载约1 kg的有效载荷用于科学测量，包括压力传感器，热电偶，磁力计，陀螺仪，加速度计和GPS接收器。所有数据将存储在内部闪存中，并通过UHF传输以实现冗余。胶囊的可恢复性由冗余定位系统（ARGOS信标和UHF传输）和降落伞系统确保。得益于创新的被动式热保护系统（如大学生开发的Fotino的其余部分）的使用，达到了极低的重量记录。 TPS的制造非常简单，为将来的低成本重返飞行任务提供了可能性。整个胶囊已经通过了几次测试活动，包括跌落测试，热测试，振动台测试和等离子腔室测试，所有这些都与模拟并行进行，从而证明了设计的有效性并验证了胶囊可以执行任务。本文概述了胶囊的发展，描述了使胶囊成为可能的设计选择，以及制造和测试结果。

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