Throat fast prediction method for solid attitude and orbit control with throat bolt

Abstract

A fast prediction method for throat-bolt solid attitude and orbit control thrust, which determines the throat bolt solid attitude and orbit control thrust physical model, design variables, constraints and design space after considering the deposition effect; generates training samples in the design space through the experimental design method The input variable of each point is used to calculate the real output response of the physical model at each training sample point; the augmented radial basis function approximation model of throat-bolt solid attitude and orbit control thrust is established by using the chaotic polynomial augmented radial basis method; The problem of determining multiple shape parameters is transformed into an optimization problem of anisotropic scaling coefficients; K ‑Folding cross-validation algorithm solves the optimization problem of anisotropic scaling coefficient, selects the anisotropic scaling coefficient with the smallest cross-validation error and brings it back to the approximate model, and obtains a fast prediction model of throat-bolt solid attitude-orbit control thrust. Based on the fast prediction model of throat-bolt solid attitude and orbit control thrust, the rapid prediction of throat bolt solid attitude and orbit control thrust can be carried out.

Description

technical field [0001] The invention belongs to the technical field of thrust prediction of a solid attitude and orbit control engine, and in particular relates to a fast prediction method for thrust of a throat bolt type solid attitude and orbit control. Background technique [0002] The actual equivalent throat area of ​​each nozzle is different from the ideal equivalent throat area due to the deposition effect of the nozzle of the solid attitude and orbit control engine, resulting in a deviation between the actual thrust and the expected ideal thrust. Quickly and accurately predicting the nozzle thrust of the solid attitude orbit control engine after considering the deposition effect is of great significance for the precise control of the engine thrust. [0003] At present, there are few researches on the thrust prediction of solid attitude orbit control engine at home and abroad. The commonly used neural network-based thrust prediction methods for solid attitude and orb...

AI Technical Summary

Problems solved by technology

[0011] Aiming at the problem that the actual equivalent throat area of ​​each nozzle is different from the ideal equivalent throat area due to the deposition effect of the solid attitude orbit control engine nozzle, resulting in deviations between the actual thrust and the expected ideal thrust, the invention proposes a throat plug type The rapid prediction method of solid attitude and orbit control thrust solves the problems of low prediction accuracy, slow prediction speed and localized prediction information existing in the existing neural network technology-based solid attitude and orbit control engine thrust prediction method

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