Aerospace Technic and Technology

The subject of the work is the process of creating Earth remote sensing spacecraft (ERS SC) within the framework of solving the problem of obtaining a high-resolution optical system by achieving high temperature dimensional stability (TDS) while retaining the strength of load-bearing structures (LBSs) during SC operation in orbit. The purpose of the work is to substantiate the block diagram of a package of SC strength measures that has been developed and is being implemented at Yuzhnoye SDO in the process of creating ERS SC containing laminar composite materials in their load-bearing structures, in particular using in their LBSs laminar polymer composite materials (PCMs) with special patterns of reinforcing carbon fibers. Objectives of the work: to analyze the use of layered structures with a resulting coefficient of temperature linear elongation close to zero, including negative in the direction of developing a long-term satellite remote sensing; to consider options for compensating for the weakening of the stiffness and strength characteristics of nanocrystals for TRS layered structures, taking into account the properties of PCM, significantly different from the properties of metals and alloys in the direction of increasing the reliability of spacecraft at various stages of development; to evaluate the compensation for the high cost of spacecraft for remote sensing with the duration of the period of active work in orbit based on modern information technologies.The results consist in that the article formulates features of a package of measures directly linked with ensuring the strength, stiffness, durability, and operating life of LBSs in ERS SC. This package of the measures Yuzhnoye SDO has developed and been implementing in the last years has its first priority to attain the TDS of LBSs and covers the whole life cycle of SC: design, manufacture (technology), testing and service. The service includes storage, transportation, prelaunch tests, injection into orbit and operation in orbit. The scientific novelty consists in the fact that the package takes into account all possible technological processes, tests on several versions of mockups and models with maximally full imitation of standard service conditions according to the scheme: onboard equipment ® onboard systems ® SC in whole. Problems are solved using CALS-class information technologies, for the complete realization of which a super computer has been put into operation with a peak speed of 300 teraflops. This enables to continuously improve ERS SC using PCMs for the TDS of LBSs.

spacecraft; Earth remote sensing; polymer composite material; temperature dimensional stability; strength; stiffness; durability; operating life

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