A fast prediction method for accurate ballistic trajectory of hypersonic vehicle based on 3D flight profile

Abstract

The invention discloses a method for quickly predicting the precise ballistic trajectory of a hypersonic vehicle based on a three-dimensional flight profile, which includes the following steps: 1. Establishing a space motion model of the hypersonic vehicle; Power, followed by real-time compensation based on the predicted flight state; 3. Establish a pole-changing geocentric coordinate system, and obtain the aircraft pole-changing model through pole-changing transformation; 4. Take the longitudinal lift-to-drag ratio, lateral lift-to-drag ratio, and energy as the coordinate frame, Design the three-dimensional flight profile; Fifth, based on the small parameter perturbation strategy, solve the perturbation analytical solution of the dynamic model of the hypersonic vehicle based on the three-dimensional flight profile. Based on the direct mapping relationship between the three-dimensional flight profile and the flight trajectory, the present invention obtains the prediction analytical solution of the aircraft trajectory by adopting a small parameter perturbation strategy, and the prediction model has good prediction accuracy and rapidity.

Description

technical field [0001] The invention belongs to the technical field of rapid trajectory design of hypersonic vehicles, and in particular relates to a method for rapidly predicting precise trajectory of hypersonic vehicles based on a three-dimensional flight profile. Background technique [0002] Due to its rapid response capability, strong defense penetration capability, high maneuverability and precision strike capability, hypersonic vehicles have great military value and potential economic value, and their trajectory design, guidance and planning issues have become current research hotspots. [0003] During the re-entry flight of a hypersonic vehicle, the flight speed is fast and the maneuvering range is large. Constraints such as heat flow, overload, dynamic pressure, angle of attack, and roll angle have a significant impact on the maneuvering of the aircraft, making re-entry trajectory prediction a complex and multi-constrained task. Conditional nonlinear model solving p...

AI Technical Summary

Problems solved by technology

[0004] The current ballistic fast solution methods are mostly based on simplified models to solve, the loss of dynamic information is large, and the accuracy of predicted ballistics is uncontrollable

However, solving the ballistic model directly by dynamic integral will lead to problems such as large amount of calculation, long solution time, and large amount of stored data.

[0005] Therefore, it is a technology that needs to be solved urgently in this field to design a high-precision and fast solution method for the hypersonic vehicle trajectory that can overcome the problem of insufficient performance of the aircraft due to the large deviation of the traditional voyage prediction, and can give full play to the capabilities of the hypersonic vehicle. problem

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