Determining method for terminal guidance shift-exchange conditions of reenter vehicle

Abstract

The invention discloses a determining method for terminal guidance shift-exchange conditions of a reenter vehicle. The determining method includes (1), generating preset shift-exchange point information; (2), correcting the preset shift-exchange point information generated in step (1), and generating a preset shift-exchange point error ball; (3), designing guidance gain which is changeable with time; (4), determining a command smoothing time factor sequence sorted according to time; (5), determining shift-exchange logic, starting terminal guidance of a seeker when the shift-exchange logic is completely met; (6), in the process of midcourse guidance flight of the reenter vehicle, performing midcourse guidance by the aid of the guidance gain, which is changeable with the time, determined in step (3), judging whether the shift-exchange logic determined in step (5) is met or not in real time, starting the terminal guidance of the seeker when the shift-exchange logic is met, picking a factor from the command smoothing time factor sequence determined in step (4) according to order, performing smoothing on the midcourse guidance and the terminal guidance by the factor, performing guidance according to a command subjected to smoothing, and shifting to the simple terminal guidance of the seeker after preset time is reached.

Description

technical field [0001] The invention belongs to the technical field of weapon system design, and relates to a method for determining the shift condition of the terminal guidance of a reentry vehicle. The invention is mainly applied to the design and realization of the transition conditions of the middle and terminal guidance of the reentry precision strike aircraft, so as to ensure the strike precision of the payload. Background technique [0002] Reentry vehicles have the characteristics of high dynamics and multiple constraints, which are especially important for vehicles with terminal guidance capabilities. A reentry vehicle with terminal guidance capability needs to experience a wide range of speed changes and altitude changes, and the performance requirements for the guidance and control system are relatively strict. In general, different guidance systems are used for intermediate guidance and terminal guidance. After the mid-to-terminal guidance is handed over, the po...

AI Technical Summary

Problems solved by technology

Therefore, it is a high-reliability, high-precision flight guidance control mode, which brings many new challenges and difficulties to the control system

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