Composite laminate shells have been applied more and more widely in aerospace structures . in order to increase thrust to weight ratio and improve the comprehensive performance of airplane , optimization design must be carried out . this thesis brings forward utilizing the method of aga - fem , which combines adaptive genetic algorithm ( aga ) and finite element method ( fem ) , to optimize fibre - reinforced composite shells 本文提出采用自適應(yīng)遺傳算法( adaptivegeneticalgorithm )和有限元方法( finiteelementmethod , fem )結(jié)合即aga - fem方法進行纖維增強型復(fù)合材料層合殼結(jié)構(gòu)的優(yōu)化設(shè)計,并對某航空發(fā)動機復(fù)合材料機匣進行優(yōu)化設(shè)計分析,取得了很好的效果。
The thesis includes the following five aspects : a ) introduce characteristics , application and development summary of parallel machine tool and intelligent control , b ) introduce of fundamental knowledge , c ) the research of error compensation control , d ) the research of parallel calculation and parallel control , e ) the research of fuzzy control . according to the characteristics of pmts , such as : very good stiffness to weight ratios , large feed speed , high position accuracy , simple mechanical structure etc . a real time error compensation control scheme which is based on bp neural network is proposed 本論文包含以下五個方面: a )介紹了智能控制和并聯(lián)機床的特征、應(yīng)用和發(fā)展概況; b )介紹了bp神經(jīng)網(wǎng)絡(luò)、 dsp技術(shù)、模糊控制和并聯(lián)機床的基本知識; c )研究了基于bp神經(jīng)網(wǎng)絡(luò)的并聯(lián)機床的誤差補償控制策略; d )研究了基于dsp技術(shù)的并行計算方法和并行控制策略; e )研究了基于模糊邏輯控制的并聯(lián)機床的位置控制。
Cu2 + . cr3 + were selected with different weight ratio doping in tio2 to study the photocatalyst modifying in this paper . the experiments of degradation methylene blue showed that the doping results were quantitatively correlated with the transition metal ion radii . their electronic configuration 對次甲基藍的降解實驗表明摻雜離子的修飾效果與過渡金屬離子的離子半徑、外圍電子構(gòu)型、氧化還原電位和離子濃度等因素有關(guān),質(zhì)量比為0 . 5的fe ~ ( 3 + )摻雜對次甲基藍的降解效率最高。