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Current algorithms for bounded model checking (BMC) use SAT methods for checking satisfiability of Boolean formulas. These BMC methods suffer from a potential memory explosion problem. Methods based on the validity of Quantified Boolean Formulas (QBF) allow an exponentially more succinct representation of the checked formulas, but have not been widely used,(More)
Current algorithms for bounded model checking use SAT methods for checking satisfiability of Boolean formulae. These methods suffer from the potential memory explosion problem. Methods based on the validity of Quantified Boolean Formulae (QBF) allow an exponentially more succinct representation of formulae to be checked, because no "unrolling" of the(More)
The ability to autonomously assemble large structures in space is desirable for the construction of large orbiting solar arrays, interplanetary spacecraft, or space telescopes. One technique uses free-ying satellites to manipulate and connect elements of the structure. Since these elements are often exible and lack embedded actuators and sensors, the(More)
—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(More)
— 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(More)
There is widespread investment of resources in the fields of Computer Science, Science, Technology, Engineering, Mathematics (CS-STEM) education to improve STEM interests and skills. This paper addresses the goal of revolutionizing student education using collaborative gaming and competition, both in virtual simulation environments and on real hardware in(More)
The deployment of space robots for servicing and maintenance operations, which are tele-operated from ground, is a valuable addition to existing autonomous systems since it will provide flexibility and robustness in mission operations. In this connection, not only robotic manipulators are of great use but also free-flying inspector satellites supporting the(More)
Since beginning operations aboard the International Space Station (ISS) in May 2006, the Synchronized Position Hold Engage Reorient Experimental Satellites (SPHERES) facility has completed a total of twelve test session with over 150 tests. As a testing environment for distributed satellites systems, SPHERES research concentrates on the development of(More)
Large spacecraft represent a large investment of time and money, and are often risky ventures. The ability to visually inspect craft provides operators and engineers valuable information about on-orbit failures or salvagability. To minimize the risk of damage to the large craft, initial inspection maneuvers should be designed to maintain a safe observation(More)
— 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(More)