A method and system for determining the overall parameters of a solid launch vehicle based on uncertain optimization

Abstract

The invention relates to a method and system for determining overall parameters of a solid launch vehicle based on uncertain optimization. The method comprises the steps of constructing a system modelof the solid launch vehicle, comprising optimization variables and system parameters; according to the system model of the solid launch vehicle, establishing the deterministic optimization model; establishing the deviation model of the optimization variables and the system parameters in the system model of solid launch vehicle; according to the solid vehicle system model, the deterministic optimization model and the deviation model, establishing an uncertain optimization model; solving the deterministic optimization model and obtaining the result; taking the result as the initial value of theuncertain optimization model, solving the uncertain optimization model and obtaining the overall parameters of the solid launch vehicle. By considering the influence of uncertain factors in the development process, the robustness and reliability of the design scheme can be improved and the overall scheme can be more competitive in the design of the overall parameters.

Description

technical field [0001] The invention relates to a method and system for determining overall parameters of a solid carrier based on uncertainty optimization, which can effectively improve the quality of the overall design scheme of the solid carrier and belongs to the field of overall design of aircraft. Background technique [0002] The solid vehicle has the characteristics of fast response, strong maneuverability, high reliability and low cost, and is an important space vehicle. In the initial stage of solid carrier program demonstration, it is necessary to optimize the overall parameters such as inter-stage ratio, engine thrust and working time of each stage according to the determined technical index requirements. This link is the basis of the overall scheme design of the solid carrier, and has a significant impact on the overall performance level of the carrier. [0003] The traditional design method often decouples the whole from other disciplines, adopts the serial mo...

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Problems solved by technology

[0004] However, when MDO technology is used for overall parameter design, the optimization variables and system parameters are generally regarded as deterministic, but in the actual engineering development process, there are often large uncertainties in each variable and parameter. Influenced by these uncertain factors, the robustness and reliability of the scheme are often poor, and the scheme may not be effectively closed in the detailed design stage, and the design scheme needs to be greatly adjusted or even redesigned, resulting in a significant increase in the development cycle and cost. , which is not conducive to practical engineering applications

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