A method for determining the objective function of sounding rocket aerodynamic shape optimization

Abstract

In order to overcome the shortcomings of the existing objective function determination methods in the optimization process of the aerodynamic shape design of the sounding rocket in terms of optimization efficiency and optimization result performance, the present invention provides a method for determining the objective function of the aerodynamic shape optimization of the sounding rocket. The present invention takes the minimum momentum loss caused by aerodynamic resistance along the trajectory as the starting point, and proposes a method for determining the objective function of the aerodynamic shape optimization of the sounding rocket comprising the following steps: (1) providing the initial trajectory data of the ascent section of the rocket; (2) initial trajectory data Preprocessing, determine the ballistic feature points; (3) Calculate the weighted coefficients of each feature point; (4) Take the minimum weighted drag coefficient of the ballistic feature points as the objective function of the sounding rocket aerodynamic shape optimization. The invention significantly improves the efficiency of the optimization of the aerodynamic shape of the sounding rocket, improves the performance of the optimization result, is applicable to the shape design of various sounding rockets and at each design stage, and can be extended and applied to the determination of the objective function of the optimization of the aerodynamic shape of other aircraft question.

Description

technical field [0001] The invention belongs to the field of aircraft shape design optimization, in particular to a method for determining an objective function of sounding rocket aerodynamic shape optimization. Background technique [0002] Sounding rockets are an indispensable and effective tool for space exploration and scientific experiments. Since the first sounding rocket Wac Corporal was launched by the Jet Propulsion Laboratory (JPL) in 1945, humans have launched thousands of sounding rockets. A large number of application results have been achieved in the fields of meteorological detection, space environment detection, microgravity experiments, biological experiments and verification of new space technologies. With the rapid development of near-space vehicles and the continuous progress of space scientific research, the use mode of sounding rockets will continue to expand, and they will be more and more widely used in the field of space exploration and scientific ex...

AI Technical Summary

Problems solved by technology

At present, there are mainly two methods for determining the objective function of the aerodynamic shape design optimization of sounding rockets at home and abroad: one is to combine ballistic simulation, and take the ballistic characteristic data such as the highest height of the ballistic apex as the objective function; Objective function, the shape optimization result obtained by the former can maximize the height of the ballistic vertex and improve the performance of the rocket, but a single objective function calculation process needs to complete the calculation of aerodynamic characteristics and ballistic integration in sequence, which takes a long time; the acquisition of the latter objective function only involves The calculation of aerodynamic characteristics is relatively convenient, but the selection of weighting coefficients is relatively subjective and arbitrary, and cannot maximize the height of the ballistic apex

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