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A software model has been developed to simulate the on-orbit dynamics of a dual-mass tethered system where one or both of the tethered spacecraft are able to produce propulsive thrust. The software simulates translations and rotations of both spacecraft, with the visco-elastic tether being simulated as a lumped-mass model. Thanks to this last feature, tether longitudinal and lateral modes of vibration...
The present work introduces low authority robust control algorithms and their application in a consistent procedure of Rendezvous and Docking or Berthing of Spacecrafts (RVD/B). This consistency implies achieving a maturity level that guarantees successful docking at least 90% of the time. Robust Nonlinear Adaptive Controllers are developed to compensate the friction effects in ground testing. H∞...
With the process size of microelectronics shrinking well below 90 nm, the characteristics of upsets experienced by spacecraft avionics are drastically changing; traditional hardware mitigation techniques are reaching performance limitations. A method for achieving reliability, along with the performance capabilities of new technologies, is through the use of an innovative avionics architecture which...
Since 2006 the SPHERES facility aboard the International Space Station has enabled research of high-risk autonomy algorithms which would not otherwise be conducted in a regular space mission. A thread of research with several demonstrations aboard the ISS is Collision Avoidance. Through two SPHERES test sessions over the course of a year, researchers have developed an efficient autonomous collision...
The designation of the International Space Station as a National Laboratory enhances the ability to use the facility for educational objectives. The MIT Space Systems Laboratory and Aurora Flight Sciences started the Zero Robotics program to enable High School students to participate directly in the science conducted aboard the ISS. The program, based on the successful history of the FIRST Robotics...
In space applications, system designs involve a particularly thorough assessment of performance, reliability and stability, as failure cost increases very significantly at each design stage. This effort has to be stressed when evaluating the feasibility of an innovative concept such as an In-Space Wireless Power Transmission (WPT) link. In this context, this work addresses modelling/characterizing...
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