Throat bolt type solid attitude and orbit control thrust rapid prediction method

Abstract

The invention discloses a pintle type solid attitude and orbit control thrust rapid prediction method. A pintle type solid attitude and orbit control thrust physical model, design variables, constraint conditions and a design space after a deposition effect is considered are determined; generating input variables of training sample points in a design space through an experimental design method, and calculating a real output response of the physical model at each training sample point; establishing an augmented radial basis function approximation model of the pintle solid attitude and orbit control thrust by adopting a chaotic polynomial augmented radial basis method; converting a problem of determining a plurality of shape parameters in the approximation model into an anisotropic scaling coefficient optimization problem; and solving the anisotropic scaling coefficient optimization problem by adopting a K-fold cross validation algorithm, selecting the anisotropic scaling coefficient with the minimum cross validation error, and bringing the anisotropic scaling coefficient back to the approximation model to obtain a pintle type solid attitude and orbit control thrust rapid prediction model. And rapid prediction of the pintle type solid attitude and orbit control thrust can be carried out based on the pintle type solid attitude and orbit control thrust rapid prediction model.

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...

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