• very large solar batteries and reflectors • large support structures for space-based platforms • long elements with space between control points exceeding dozens of meters • and ground-based, fast, movable receiving devices working in conjunction with the space systems. Development of the construction classes is based on the following novel approaches: creation of structures with unilateral joints, ring systems, pneumo-rigid (pneumatic-rigidizcd) structures, and pre-stressed parts, as well as many other innovative approaches, which originate from the best traditions of civil engineering. Theoretical studies The theoretical studies address the problems of mathematical simulation of the unfolding a structure in space. It includes complete analysis of the process dynamics and the creation of a mathematical model for analysis of a structure's operational behavior. The computer program for the mathematical simulation contains the following parameters: stand-alone process temporal intervals; the structure's abnormal behavior; alteration of the system's geometrical parameters; oscillation frequency and amplitude; element strength, local and universal stability etc. The program produces a display of numerical and graphical information and the process animation on the screen. For example, Figures 1 and 2 show the printouts of stills for the antenna unfolding process in abnormal and normal modes. Design of the structure system and release of a technical data kit for manufacture. Presently, the following structure system technical data kits have been released and implemented. 1. Space radio telescope 30 m in diameter working within the decimeter and meter wave range. The weight of the metallic version of the antenna is 750 kg, the composite materials version of the antenna is 470 kg. Unfolding time is 45 seconds. Dimensions of the cylinder-shaped pack are: diameter = 1.8 m and height = 2 m. The unfolding mechanism of the two systems is in the form of the forces of elasticity and motors 2. The space radio telescope with the aerial reflector diameter of 30 m working in the centimeter wave range. The weight of the metallic version of the radio telescope is 1100 kg, the composite materials version of the radio telescope is 850 kg. Unfolding time in space is 25 sec. The dimensions of the folded, transportable pack are: diameter = 2 m, height = 2.1 m. The unfolding mechanism is two electromechanical systems and the accumulator-based version of the elasticity forces
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