A gliding aircraft three-dimensional reentry guidance method based on analytical prediction

Abstract

The invention discloses a gliding aircraft three-dimensional reentry guidance method based on analytical prediction. The method comprises the following implementation steps of: constructing a three-dimensional flight corridor taking a longitudinal lift-drag ratio, a lateral lift-drag ratio and energy as a standard frame by considering constraint conditions, directly designing a flight profile in the three-dimensional flight corridor based on a prediction model, designing a reasonable heeling overturning strategy, updating the flight profile, and tracking the flight profile to generate a heeling angle instruction and an attack angle instruction. The method is based on a high-precision analysis model; the aircraft target accessibility and the lateral maneuvering task requirements are comprehensively considered; A flight profile and an overturning strategy are directly designed in a three-dimensional flight corridor constructed by considering a plurality of constraint conditions; An attack angle instruction and a roll angle instruction are generated through profile tracking, so that the design of the three-dimensional reentry guidance method is completed, the integrity of dynamic information can be ensured, and the task adaptive capacity of the gliding aircraft under the long-distance large-range maneuvering condition is fully exerted.

Description

technical field [0001] The invention relates to the field of aircraft dynamics and guidance, in particular to a three-dimensional re-entry guidance method for gliding aircraft based on analytical prediction, which can be widely used in the calculation of guidance methods for gliding re-entry aircraft such as hypersonic aircraft and manned spacecraft. Planning and guidance provide support, which has broad application prospects and value. Background technique [0002] Since the advent of glide vehicle (glide reentry vehicle), the guidance method of space shuttle based on two-dimensional drag acceleration profile has been favored in the research of traditional reentry guidance methods. Based on this, the researchers proposed some improved drag acceleration profile tracking guidance methods for different application backgrounds. These improvement methods are mainly considered from two aspects: in the vertical direction, the longitudinal tracking guidance law is improved, and th...

AI Technical Summary

Problems solved by technology

However, there is a deficiency in these technical solutions: the angle of attack scheme generally needs to be given in advance based on the longitudinal range requirements, and only depends on adjusting the roll angle to take into account the lateral maneuvering requirements of the gliding aircraft

As a key control parameter to determine the maneuverability, once the angle of attack scheme is determined in advance, even if it can be fine-tuned in actual flight, it will greatly limit the actual maneuverability of the glide vehicle

Especially for some extreme targets, there may be a problem that the actual ability of the glide vehicle can be reached but it is difficult to guide due to the limited guidance method

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