基于改进增广径向基的固体姿轨控发动机推力快速预示  

Fast Thrust Prediction Method for Solid Divert and Attitude Control System Based on Improved Augmented Radial Basis Functions

作　　者：张杰[1] 李国盛 文谦 王东辉[1] 武泽平 张为华 ZHANG Jie;LI Guo-sheng;WEN Qian;WANG Dong-hui;WU Ze-ping;ZHANG Wei-hua(College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学空天科学学院,湖南长沙410073

出　　处：《推进技术》2023年第8期201-209,共9页Journal of Propulsion Technology

基　　金：国家自然科学基金(52005502);国防科技大学科研计划(ZK19-11)。

摘　　要：为实现沉积影响下的喉栓式固体姿轨控发动机推力快速预示,提出一种融合各向异性和快速交叉验证的增广径向基近似建模方法。基于正交条件构建混沌多项式增广的径向基混合模型,并提出基于样本局部密度的各向异性方法,进一步提高混合模型精度。采用递归演化的拉丁超立方试验设计生成样本点,根据通用交叉验证误差求解过程中高阶矩阵快速求逆方法,降低模型训练的计算复杂度。与其他常用代理模型方法相比,本文提出的方法具有更好的精度和稳定性。将本文方法应用于固体姿轨控发动机推力快速预示,预示结果与仿真结果偏差控制在2.5%以内,计算耗时由小时级降低至秒级。In order to realize the rapid prediction of the thrust of solid divert and attitude control system(SDACS)with pintle under the influence of deposition,this paper proposes an augmented radial basis function metamodeling method based on anisotropic and fast cross validation.Firstly,a polynomial chaos expansions aug-mented radial basis functions metamodel is constructed based on orthogonal conditions,and an anisotropic meth-od based on local density of samples is proposed to further improve the accuracy of the metamodel.Secondly,the recursive evolution Latin hypercube design is used to generate sample points.According to the fast inversion method of high-order matrix in the process of solving the universal cross-validation error,the computational com-plexity of model training is reduced.Compared with other common metamodels,the proposed method has better accuracy and stability.The proposed method is applied to the thrust fast prediction of solid divert and attitude con-trol system.The deviation between the predicted results and the simulation results is controlled within 2.5%,and the calculation time is reduced from hour level to second level.

关 键 词：固体姿轨控发动机 增广径向基函数 各向异性 代理模型 交叉验证 推力预示 

分 类 号：V231.1[航空宇航科学与技术—航空宇航推进理论与工程]