Torpedo Overall Multidisciplinary Design Based on Collaborative Optimization

A torpedo multidisciplinary design optimization （MDO） based on the collaborative optimization is proposed. Through decomposition and coordination, some problems in torpedo design such as multidisciplinary coupling, large data volume and complex data relationships can be solved. Taking aim at some complex problems in the torpedo design, such as computation in multidisciplinary design, organization, modeling and information exchange, the collaborative optimization methods based on approximate technology are presented. An example to increase the torpedo range is also given. It demonstrates that the method can converge quickly, has higher reliability and smaller data throughput, and is a very effective MDO method.     

Design Method of Equipment Optimization Development Based on Standardization Theory

The matters of equipment optimization development are usually discrete, fuzzy and non-quantitative. It is difficult directly to optimize the equipment development with a mathematical model. A set of methods for designing the equipment optimization development with six di- mensions and eight main elements is established based on the theory and method of standardization. The top-tier design space of systematic development of equipment is built up by the relations of basic models, series and model spectrums. The relations of time and space for equipment optimization development are established. The design processes of a six dimension systematic space are expounded. The connotation of each plan in the main system space is analyzed. A design method for an entire equipment is established with standardization theory. The coordinating design methods of equipment technical system and the optimization design methods of equipment integration are discussed. The design methods for universalization and serialization of components and parts are established. The design methods of equipment optimization development highlight the relations of the basic model of platform, the serialization of platform basic models, the modularization of equipment functions, the model spectrum of variant equipment, and the universalization and serialization of components and parts.     

Design of PID Controllers System with Multiple of Anti-aircraft Artillery Servo Performance Specifications

A novel design method for determining the proportional-integral-derivative（PID） controller gains of an anti-aircraft artillery servo system with multiple performance specificauons based on a particle swarm optimization （PSO） algorithm is proposed. First, a performance criterion evolution function combined with the system maximum displacement settling time, rise time, overshoot, steady state error, constant velocity tracking error and sine wave tracking error is defined. Second, the optimization problem of PID controller parameters and the searching procedure of PSO algorithm are constructed. Finally, the optimal or near optimal PID controller parameters are fast and easily obtained by solving the above optimization problem on the given controller parameter space following the PSO searching procedure. The simulation results show the effectiveness of the proposed controllers.     

Real-time Parallel Processing System Design and Implementation for Underwater Acoustic Communication Based on Multiple Processors

ADSP-TS101 is a high performance DSP with good properties of parallel processing and high speed. According to the real-time processing requirements of underwater acoustic communication algorithms, a real-time parallel processing system with multi-channel synchronous sample, which is composed of multiple ADSP-TS101s, is designed and carried out. For the hardware design, field programmable gate array （FPGA） logical control is adopted for the design of multi-channel synchronous sample module and cluster/data flow associated pin connection mode is adopted for multiprocessing parallel processing configuration respectively： And the software is optimized by two kinds of communication ways： broadcast writing way through shared bus and point-to-point way through link ports. Through the whole system installation, connective debugging, and experiments in a lake, the results show that the real-time parallel processing system has good stability and real-time processing capability and meets the technical design requirements of real-time processing.     

Rough Set Fuzzy Optimum Selecting in Multidisciplinary System

Scheme evaluation and selection is an optimum selecting and sequencing problem with multi-objective and multilevel. It can＇t follow single objective function or rule. Meanwhile, these objectives are coupled with each other and the attribution information is fuzzy also. It is necessary to find an effective evaluation method which can consider all conditions and restrictions. In this paper, AHP and rough set theory are applied to fuzzy optimization to determine important weight of each attribution. The rough set fuzzy optimum selection is used to eliminate the useless information. Autonomous un- derwater vehicle （AUV） is large-scale systems with many coupled design variables and objective functions. Their scheme evaluation and selection are very important, which relate to multiple factors, such as reliability; security, service time; the lifecycle, etc. Results of application in torpedo design indicate that this method is feasible.     

Topology Optimization in Damping Structure Based on ESO

The damping material optimal placement for the structure with damping layer is studied based on evolutionary structural optimization （ESO） to maximize modal loss factors. A mathematical model is constructed with the objective function defined as the maximum of modal loss factors of the structure and design constraints function defined as volume fraction of damping material. The optimal placement is found. Several examples are presented for verification. The results demonstrate that the method based on ESO is effective in solving the topology optimization of the structure with unconstrained damping layer and constrained damping layer. This optimization method suits for free and constrained damping structures.     

Study on Multi-objective Optimization of Airbag Landing Attenuation System for Heavy Airdrop

A finite element model of velticle mad its alrbag landing attenuation system is established mad verified experimentally. Two design cases are selected to constrain the ah-b ag design for extreme landing conditions, wfiile the height and width of ah-bag and the area of vent hole are chosen as design variables. The optimization is forced to compromise the design variables between the conflicting requirements of the two extremes. In order to optimize the parameters of ah-bag, the multi-dimensional response surfaces based on extended Latin hypercube design and radial basis function are employed instead of the complex filtite element model. Pareto optimal solution sets based on response surfaces are then obtained by multi-objective genetic algotitlml. The results show the optimization method presented in tfiis paper is a practical tool for the optimization of ah-bag landing attenuation system for heavy airdrop.     

AUV Load Separation Motion with Constraint of Anchor Chain

Motion equations of AUV（autonomous underwater vehicle） load separation with the constraint of anchor chain is derived. Based on proper engineering assumptions for anchor chain, system viewpoint is used to found the motion equations, and the D＇ Alemhert principle is used to eliminate the constraint force of anchor chain. Based on the equations, the motion simulation is carried out to a certain AUV, which reflects the actual condition, and is used for the reference of resrarching AUV load separation motion with the constraint of anchor chain.     

Structural Optimization of Machine Gun Based on Dynamic Stability Concept

Improving the firing accuracy is a final goal of structural optimization of machine guns. The main factors which affect the dispersion accuracy of machine gun are analyzed. Based on the concept of dynamic stability, a structural optimization model is built up, and the sensitivity of dispersion accuracy to design variables is analyzed. The optimization results of a type of machine gun show that the method is valid, feasible, and can be used as a guide to the structural optimization of other automatic weapons.     

A Study on the Estimation of Aeroheating upon the Warhead Nose at Supersonic Speed

An expression for estimating the aeroheating on a warhead nose at different supersonic speeds is proposed by incorporating CFD （computational fluid dynamics） and the least-square method. Compared with the traditional estimation formula, the expression is more accurate, convenient and can be used in the optimized design of warheads. The error from the result obtained in the test of a ball cartridge flight is less than 3 %. It satisfies the engineering requirements.     

计算机辅助双基系固体推进剂配方概念设计方法研究

为了降低基于优化技术求解配方问题可能无解的风险,提出了基于质量功能展开(QFD)和公理化设计(AD)的双基系固体推进剂配方概念设计方法和模型,利用配方概念设计系统设计了一个改性双基推进剂配方实例,展示了该模型在推进剂配方概念设计系统中的运用效果。结果表明,在配方概念设计阶段初步求解基本满足指标要求的配方功能成分及其边界含量,确保后续配方详细设计(优化设计)有解。在传统的配方设计工作中,按照"概念设计+详细设计+性能预估+再设计"的新方法能有效避免优化无解风险,提高配方设计效率,降低配方设计成本。     

使用多学科设计优化方法对鱼雷总体综合设计的建模思路研究

多学科设计优化方法是一种新的针对复杂工程系统设计的求解方法,给出了多学科设计优化方法的参数表示,分析了鱼雷总体综合设计的学科划分和耦合参数,然后分别使用三种典型的多学科设计优化方法——多学科可行性法、单学科可行性法和协调优化法对鱼雷总体综合设计进行建模思路研究,并对三种模型进行了对比分析。     

基于电子表单的圆柱形壳体结构参数化设计

针对水下航行器研制中存在的设计周期冗长现象,提出了一种结构设计的新思路,以自主式水下航行器(AUV)圆柱段壳体结构优化设计为例,利用电子表单使UG的建模功能与MATLAB科学运算功能得到有效的结合,完成了对壳体结构的优化设计及模型更新,重点说明了如何利用电子表单在MATLAB与UG之间进行数据通信,实现了参数化结构的优化设计。研究结果表明,该方法能极大地缩短结构设计周期,减少由于零件尺寸变化带给工程师设计上的工作量,也使得产品的结构设计系列化成为可能。     

水下航行器全动舵可靠性优化设计

利用基于中心复合采样的二阶响应面法得到AUV稳定度极限状态函数。综合考虑由于人为和客观造成的不确定性误差对极限状态方程的可靠度的影响,进行多次随机虚拟实验,计算AUV稳定度的可靠度,并根据求得的可靠度定量给出各设计变量关于极限状态函数的可靠度灵敏度。经判断,选择灵敏度较小的参数作为确定性变量,并对AUV全动舵进行可靠性优化设计,结果表明,减少不确定性量后,优化迭代次数大幅减少。     

多学科优化设计技术在现代鱼雷设计中的应用展望

介绍了国内外多学科优化设计技术的现状与发展，基于该技术在国内起步较晚、在鱼雷领域的应用还是空白的现状，展望了多学科优化设计技术在现代鱼雷技术中的应用，认为应从4个方面开展工作：建立适合鱼雷使用的系统优化模型；确定优化算法；研究优化设计流程；建立鱼雷总体多学科优化设计平台，从而实现全雷各系统各学科的协同设计，提高鱼雷总体设计水平。同时介绍了几种优化算法，如单级优化算法、并行子空间优化算法和协作优化算法，以及几种优化设计平台，如美国Engineous Software公司开发的iSIGHT软件、Sandia国家实验室开发的DAKOTA软件、Vanderplaats开发的VisualDOC软件、Phoenix Integration公司开发的ModelCenter软件等的技术特点。     

水下航行器壳体结构多目标优化设计研究

针对大深度水下航行器壳体结构多目标优化问题,提出一种基于自适应响应面的多目标优化方法。该方法利用实验设计得到初始点,利用响应面构造近似模型,初次优化得到Pareto解集。引入一种空间采点法,均匀得到Pareto解样点,使用高精度有限元分析技术校核后补充到初始样本集,通过一种渐近全局策略使近似模型最终满足精度。利用灰色关联分析法处理Pareto解集。结合水下航行器壳体结构实际情况,提出一种多级标度赋权法,在获得各目标权重后从Pareto解集中挑选出满意解,优化后与传统经验公式结果相比,在满足近似精度的前提下,总体性能有了一定提高。     

基于试验设计和响应面近似的高超声速巡航飞行器多学科设计优化

建立了基于试验设计理论和响应面近似的超燃冲压发动机推进的高超声速巡航飞行器多学科设计优化方法。首先建立外形尺寸、质量估算、气动力性能、气动热性能和推进性能学科的分析模型。模型考虑了学科间的耦合效应，结合弹道方程，形成了飞行器的总体性能模型。然后分别采用D—Optimal设计、Taguchi设计和均匀设计选择设计点，通过多机并行计算完成高超声速巡航飞行器性能分析。根据分析结果，构造响应面近似模型。通过响应面近似模型的优化，完成了高超声速巡航飞行器的多学科设计优化。计算表明，基于试验设计的多学科设计优化方法可以用于高超声速巡航飞行器的优化设计。     

新型装备模块化概念设计方法

针对传统装备概念设计存在的种类繁多、规格不统一等问题,提出一种新型装备模块化概念设计方法。简要概述模块化理论,重点描述模块化概念设计内容,给出其详细设计流程。通过该方法的应用,可进一步增强新型装备的模块化水平,提高新型装备的体系作战能力,并为相关研究人员提供参考。     

飞航导弹总体方案评价决策技术研究

从飞航导弹总体方案设计及评估需求出发，结合灰色模糊综合评价理论，建立了飞航导弹总体方案评价体系，并研究了灰色模糊综合评价方法及其在飞航导弹总体设计方案评价系统中的应用．     

基于TOPSIS的地空导弹总体方案评价决策研究

地空导弹总体方案科学与否直接关系到地空导弹性能的优劣，科学准确地评价总体方案是做出正确决策的前提．针对地空导弹总体方案定量分析问题，提出了一种用基于AHP法分配权重，模糊数学量化定性指标，最终运用目标决策分析中逼近于理想解的排序方法（TOPSIS）对总体方案进行排序，比较好地克服了以往方法区分度小等不足．实例表明，该方法是有效而又实用的。