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In order to develop an intelligent guidance and control system, which can increase the mission robust performance in the full launch cycle, this paper provides the launch vehicle fault modes, and presents a fault classification method based on the energy characteristics firstly. The function and performance requirements to the guidance and control system are put forward for different ranks of energy fault. Especially, for the small and medium energy faults, the self-adaptive guidance methods, including the case and orbit-changing principle, are introduced; besides, the ways of implementation for the applications of the self-adaptive guidance technology are discussed. The fault classification method based on the energy characteristics and the self-adaptive guidance method can be applied to the future launch vehicles of China. [ABSTRACT FROM AUTHOR]

The numerical simulation method and the transport of the communication characteristics for different electromagnetic waves of the plasma sheath are analyzed. Firstly, based on the flight communication data of a blunt-nosed project, the numerical simulation method and the transport method of the communication characteristics in this paper are preliminarily proved to be feasible. Secondly, the communication characteristics of the plasma sheath for the lifting reentry vehicle are obtained in the typical trajectory. The transport of the communication characteristics for the S-band signals, Ka-band signals and K-band signals are also investigated, which indicates that the high-frequency signals will improve the communication characteristics and can be an effective technical approach for solving the communication blackout based on the domestic relay method. Finally, the influences on the transport of the communication characteristics of the direction angle and the angle of attack are investigated. The results can provide a reference for the communication design of the reentry vehicles to solve the communication blackout in China. [ABSTRACT FROM AUTHOR]