Solid rocket engine performance progressive matching design method

Abstract

The invention provides a solid rocket engine performance progressive matching design method. The solid rocket engine performance progressive matching design method comprises the steps of acquiring task objectives of total indexes of a solid rocket engine; determining a time interval division number according to the working time of a preset thrust demand in the task target; obtaining an initial training sample set of the preset thrust demand matching degree based on an initial balance pressure method; according to the initial training sample set, operating the combustion surface and internal ballistic trajectory calculation model in the initial time interval to obtain N thrust curves, and constructing a thrust approximation model according to the N thrust curves; carrying out inaccurate sampling to obtain alternative solutions; substituting the alternative solution into a combustion surface calculation and internal trajectory calculation model, and calculating the performance of the internal trajectory within simulation time to obtain an alternative thrust curve; when the simulation time is not less than the working time, adding the alternative solution as a new sample point into asample set to obtain an updated sample set; and when a preset convergence condition is reached, outputting the alternative thrust curve as an optimal solution.

Description

technical field [0001] The invention relates to the field of aerospace technology, in particular to a design method for progressive matching of solid rocket motor performance. Background technique [0002] Solid rocket motor is one of the important power systems of space vehicles such as missiles and rockets. In the design of solid rocket motors, the thrust-time curve is the most direct performance output of the motor, and it is also the most concerned motor performance of the missile as a whole. With the continuous improvement of the refined design level of missiles, the demand for engines with specific thrust curves is more urgent. Therefore, the performance matching design for solid rocket motors can better meet the overall refined design requirements of missiles and improve the overall performance of missile weapons. Different from the existing design requirements for performance indicators, engine performance matching design is to find a set of design schemes in the d...

AI Technical Summary

Problems solved by technology

[0004] However, the current commonly used engine matching design method has the disadvantage that the fitness evaluation must be performed after the simulation is completed in each iteration process, resulting in repeated calculations of poor solutions, resulting in increased calculation time and low efficiency.

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