Control method for utilizing standard trajectory to deal with multiple return conditions

Abstract

The invention discloses a control method for utilizing a standard trajectory to deal with multiple return conditions. The control method comprises the following steps: firstly, computing a novel required longitudinal flying range and a transverse flying range under a reentry coordinate system; computing a longitudinal flying range adjustment amount and a transverse flying range adjustment amount; computing a trajectory variable parameter A and a trajectory variable parameter B; utilizing the trajectory variable parameters to perform linear transformation on independent variables, to the guidance law, of a standard trajectory, and performing translation transformation on the computed longitudinal flying range and the transverse flying range for navigation; at last using the independent variables, to the guidance law, of the standard trajectory after the linear transformation, and the computed longitudinal flying range and the transverse flying range for navigation after the translation transformation to perform standard trajectory method guidance computing. According to the control method disclosed by the invention, the standard trajectory is not required to be changed, the reentry requirement of various reentry initial terminal condition changes (particularly longitudinal flying range change) can be met; meanwhile, the terminal state control precision cannot be damaged; the task flexibility and the terminal control index requirement can be met to the largest extent.

Description

technical field [0001] The invention relates to a re-entry control method that utilizes a standard ballistic trajectory to adapt to various conditions. It can adapt to different re-entry conditions by reasonably transforming the loaded standard ballistic length and independent variables, which belongs to the guidance technology of re-entry aircraft field. Background technique [0002] The standard ballistic guidance method is a general-purpose aircraft re-entry guidance method. The standard ballistic generally refers to a pre-booked piece in the aircraft computer before the aircraft is launched or returned, which is obtained according to the pre-mission design conditions and represented by several flight process characteristic parameters. data table. During the re-entry flight of the standard ballistic aircraft, it is often necessary to use the current ballistic characteristic data calculated from the navigation data, form the guidance feedback by solving the difference wit...

AI Technical Summary

Problems solved by technology

However, compared with the carrier launch where the launch window constraints are more obvious, the working conditions of the re-entry flight of the aircraft are much more complicated. If this method is adopted, the storage requirements are obviously greater, and the matching coverage and the accuracy of the ballistic correspondence cannot be guaranteed.

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