This paper investigates the problem of attitude tracking control with predefined-time convergence for rigid spacecraft under external disturbances and inertia uncertainties. Firstly, proposed nominal controller is designed to achieve in absence uncertainties, errors can be selected advance. Then, integral sliding mode combined barrier function-based adaptive laws reject at same time, a method a...

This paper presents a novel deployable reflector concept based on the origami flasher pattern. The proposed folding architecture achieves rigid foldability for patterns applied to doubly curved surfaces, allowing parabolic reflectors be divided into number of panels efficient stowage. Such an provides intermediate solution between current rigid-surface and flexible-surface reflectors, offering ...

This paper gives a method to construct rigid spaces, which is similar to the method used to construct toric schemes.