Multi-objectives nonlinear structure optimization for actuator in trajectory correction fuze subject to high impact loadings

This paper presents an actuator used for the trajectory correction fuze, which is subject to high impact loadings during launch. A simulation method is carried out to obtain the peak-peak stress value of each component, from which the ball bearings are possible failures according to the results. Subsequently, three schemes against impact loadings, full-element deep groove ball bearing and integrated raceway, needle roller thrust bearing assembly, and gaskets are utilized for redesigning the actuator to effectively reduce the bearings' stress. However, multi-objectives optimization still needs to be conducted for the gaskets to decrease the stress value further to the yield stress. Four gasket's structure parameters and three bearings' peak-peak stress are served as the four optimization variables and three objectives, respectively. Optimized Latin hypercube design is used for generating sample points, and Kriging model selected according to estimation result can establish the relationship between the variables and objec-tives, representing the simulation which is time-consuming. Accordingly, two optimization algorithms work out the Pareto solutions, from which the best solutions are selected, and verified by the simulation to determine the gaskets optimized structure parameters. It can be concluded that the simulation and optimization method based on these components is effective and efficient.     

Prediction of three-dimensional elastic behavior of filament-wound composites based on the bridging model

This work provides a method to predict the three-dimensional equivalent elastic properties of the filament-wound composites based on the multi-scale homogenization principle.In the meso-scale,a representative volume element(RVE)is defined and the bridging model is adopted to establish a theoretical predictive model for its three-dimensional equivalent elastic constants.The results obtained through this method for the previous experimental model are compared with the ones gained respec-tively by experiments and classical laminate theory to verify the reliability of this model.In addition,the effects of some winding parameters,such as winding angle,on the equivalent elastic behavior of the filament-wound composites are analyzed.The rules gained can provide a theoretical reference for the optimum design of filament-wound composites.     

基于程序设计类课程的教育技术本科生创新思维培养研究与实践

本文基于ATDE创新教育理论,以程序设计类课程为教学阵地,对教育技术本科生创新思维培养做出了相关探索与实践。创新思维是高级的问题解决活动。培养学生的创新思维更多体现在对学生解决问题的策略应用方面。对此,本文通过给出的案例,从不同角度详细介绍了程序设计类课程对培养教育技术本科生创新思维的实施对策,以期对提高本专业建设做出有益的探索。     

装备保障信息分类与代码设计研究

根据装备保障信息化建设的需要,分析了装备保障信息的特点,探讨了信息分类的要求并提出了装备保障信息分类方法;阐述了装备保障信息代码设计的要求、分类、形式．提出了代码设计方法。     

对一体化联合作战的思考

对一体化联合作战的概念及基本特征作了介绍,探讨了研究一体化联合作战的迫切性,对我军一体化联合作战的的现状及如何加速提高我军一体化联合作战的能力作了详细的论述。     

自主式车载组合导航系统研究与仿真

考虑到车载组合导航系统运行时间长、地形环境复杂的特点,将零速修正技术与惯导/里程计/气压高度表组合导航系统相结合使用,采用序贯处理和平方根滤波算法,建立了实用的卡尔曼滤波模型。相比基本卡尔曼滤波算法,该方法实现简单,计算量小,抑制了滤波的发散,提高了滤波的精度。最后对组合导航系统进行仿真验证,取得了较为满意的结果。与INS/GPS组合导航系统相比,该系统具有良好的自主性及适应性。     

基于模糊综合评判的装备软件可靠性分析

可靠性是衡量装备软件质量的重要参数,但由于软件可靠性的特点,在实际对装备软件可靠性定量分析往往很难,甚至不可能。从软件质量框架模型出发,结合装备软件的特点,分析了影响装备软件可靠性的几个参数,提出了一种运用模糊综合评判方法对装备软件可靠性进行定性分析的方法。该方法简单,可行性强。最后,给出了一个实例。     

集成电路方波脉冲注入损伤效应实验研究

为了得到各损伤参数随脉宽的变化规律,寻找建立评价复杂EMP波形对集成电路损伤模型的依据,对2种典型的集成电路器件进行了方波脉冲注入损伤实验。结果表明:RAM6264损伤电压、电流及功率均随脉宽增大而减小,损伤能量处于某一小范围之内,可能属于能量损伤型器件;BG305损伤电压、功率随脉宽增大而减小,损伤能量随脉宽增大而增大,损伤电流处于某一个小范围之内,可能属于电流损伤型器件。     

基于QFD的维修质量管理部门设计

介绍了质量功能展开(quality function dep loym ent,QFD)的基本原理,分析了维修质量管理的目标和维修质量环,并结合具体案例,阐述了QFD在维修质量管理部门设计中的应用方法。     

舰空导弹引信发展趋势研究

简单描述了舰空导弹引信发展的历程,介绍了它的基本工作原理。根据未来海战场环境的特点,分析了舰空导弹引信发展的总体需求。从提高导弹引信的引战配合、抗干扰能力、可靠性三大技术指标的角度,着重论述了舰空导弹引信的8个研究方向,探析了未来舰空导弹引信及相关的技术的发展趋势。对我国发展舰空导弹引信提出了建议。