Zhao WANG, Xiaotao TIAN, Meng HUANG, et al. Design of thrust estimator in the solid rocket ramjet based on PSO⁃BP neural network[J]. Journal of Aerospace Power, 2022, 37(7): 1487-1494.
DOI:
Zhao WANG, Xiaotao TIAN, Meng HUANG, et al. Design of thrust estimator in the solid rocket ramjet based on PSO⁃BP neural network[J]. Journal of Aerospace Power, 2022, 37(7): 1487-1494.DOI: 10.13224/j.cnki.jasp.20210325.
Design of thrust estimator in the solid rocket ramjet based on PSO⁃BP neural network
(modified adaptive BBPSO)和SNPSO(simplified pruning strategy based BBPSO)等四种不同的PSO中,基于SNPSO优化BP神经网络实现推力估计器设计是最为便捷有效的方法,不仅形式简单,而且对于测试集数据而言,其能够将推力相对误差控制在5%以内。
Abstract
A solid rocket ramjet thrust estimation method based on BP(back propagation)neural network optimized by PSO (particle swarm optimization) was proposed for direct control of the thrust of solid rocket ramjet.In detail,SPSO (standard PSO) and three different BBPSO (bare bones PSO) methods were adopted to optimize the network weights.Then,the optimal weights as the initial value were tuned finely by BP neural network training.Therefore,the nonlinear relationship between thrust and gas flow,flight Mach number as well as flight height was obtained such that the design of thrust estimator was completed.240 sets of training data were used to train the network,and 180 sets of testing data were used to verify the network.The simulation results showed that among four different PSO methods such as SPSO,BBExp (exploiting BBPSO),ABPSO
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(modified adaptive BBPSO) and SNPSO (simplified pruning strategy based BBPSO),the design of thrust estimator based on BP neural network optimized by SNPSO is the most convenient and effective method not only due to its simple form but also due to its capacity of controlling the relative thrust error within 5% for test set data.
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