Secondly, a beam-hardening correction algorithm for single material object is given in the paper, which is more precise than polynomial approaching correction algorithm and more rapid than common iterative algorithm 其次,本文給出了單成分被測物體的射束硬化校正算法,該算法較多項(xiàng)式近似校正算法更加精確,并且顯著快于一般的迭代算法。
First, according to the orthonormal quality and the rational choice of working point of the sonar array three shafts frame, the structure of the models is predigested preliminarily; secondly, according to the quality indexes and the coupling quality between frames, relatively small quantum is neglected . so the complex non-linear coupling models of the sonar array are predigested farther; lastly, considering the characteristic of the model coefficient matrix, the methods of the low rank polynomial approach and the error simulation are introduced . so the models are predigested again 首先從聲納基陣框架結(jié)構(gòu)的正交性和工作點(diǎn)的合理選擇出發(fā),使模型的結(jié)構(gòu)得以簡化;其次根據(jù)系統(tǒng)性能指標(biāo)及框架間耦合性強(qiáng)弱,忽略相對小量,對聲納基陣復(fù)雜的非線性耦合模型進(jìn)一步簡化;最后考慮模型系數(shù)矩陣的特點(diǎn),運(yùn)用低階多項(xiàng)式逼近和誤差仿真的方法,實(shí)現(xiàn)了對模型的再次降階簡化處理。