轻质穿透式薄膜盖的分析、设计与实验研究

穿透式导弹发射箱薄膜盖的研制是导弹运载工具轻质化的一部分，由于其一方面需能承受一定的压力，即需具有足够的强度，另一方面又要求顶破力较小，而这两个要求是互相矛盾的。本文通过有限元仿真计算，确定了满足这两项要求的方案。然后研制了实物，进行了实验验证，设计分析的结果与实验结果吻合。本文的研究为轻质穿透式薄膜盖的研制和应用提供了方法和依据。     

基于集合-覆盖模型的液体火箭发动机多故障诊断研究

通过从故障仿真数据中提取常见故障的效应参数症状，建立发动机的集合覆盖多故障诊断模型。根据当前发动机已有测量参数的症状与假设故障的相应参数效应症状的对比结果，对各假设故障赋以相应的奖征值，然后综合诸参数的奖惩值得到相应假设故障集的合理笥指标值值，基于该指标值利用遗传算法进行启发式的假设故障产生与测试。最后，基于所提取的效应参数症状进行了仿真故障数据样本的多故障诊断分析，并与经参数优选后的多故障诊断结     

碳化硅颗粒增强铝基复合材料及其口盖的研制

采用一种新型的复合材料替代传统的材料应用于航天产品推进舱上的口盖。经过复合材料制备、预镦粗变形、热轧和冷轧、热处理、表面阳极氧化等工艺过程，成功地制备了ＳｉＣｐ／ＬＤ１０复合材料口盖。探讨了制备过程中的工艺选择和工艺参数，并对复合材料板材的性能进行了测试。     

X波段波导端头裂缝的互耦分析

用矩量法(MOM)导出求解X波段波导端头裂缝单元间互耦等效磁流的模型。在此基础上给出了等效磁流在激励和未激励单元内部产生的场、反射系数、驻波系数和两单元间耦合系数等的计算公式。分别在共E、H面条件下分析了两X波段波导端头裂缝互耦的影响,并对单元间不同相对距离和工作频率时的互耦影响规律进行了讨论。研究结果表明,该算法简单,计算值与测试结果吻合较好。     

双端供油泵诱导轮与上端泵口卡滞故障分析与预防

通过对调试现场发生的故障现象进行分析和判断，找出整机调试中客观存在的问题，通过采取科学有效的方法与措施，杜绝后续同类故障的持续发生。     

Experiment for mapping land cover and it’s change in southeastern Sri Lanka utilizing 250 m resolution MODIS imageries

Utilizing freely available MODIS NDVI and Natural color imageries of 250 m spatial resolution produced by NASA, an experiment was made to map land-cover and its change with an emphasis on vegetation cover in southeastern Sri Lanka, which plays a vital role for control of green house gas. For the change detection purpose, 1987 land cover map made by present authors from Landsat MSS image and extensive ground truth survey data was used as the base map. The result of the experiment shows that MODIS data are useful to make a land cover map of 250 m spatial resolution for tropical areas with high cloud coverage like Sri Lanka. It was found that the forest cover decrease amounted as large as 21% in 19 years time span in southeastern Sri Lanka, the prominent forest region of the country. On the other hand homestead/vegetation and mixed vegetation/scrub dominant categories increased by 13.7% and 7.1%, respectively. These changes are considered due to a large clearance of forest areas for agriculture and building houses to accommodate increasing inhabitants.     

弹性杆端性能计算方法及验证

弹性杆端技术是旋翼系统杆端关节轴承技术的一大进步。基于传统弹性元件工程计算方法，结合橡胶计算力学理论，创建了一套弹性杆端关节轴承性能计算方法，并且通过试验结果验证了其可行性。     

Simulator of pyroshock environment and effect rules of its adjustable parameters

During the launching of spacecraft, the on-board devices will undergo a series of pyroshock environments. In order to verify the reliability of these devices under these pyroshock environments, all of them are needed to take the shock test before launching. This paper has carried out an in-depth research on the simulation method of the pyroshock based on the true explosive excitation. In this study, a simulator containing multiple adjustment parameters is presented and the safety is considered by the design of the protective cover. And the working process of this setup is simulated with the explicit dynamic codes LS-DYNA. What’s more, the effects of the adjustment parameters on the three factors of shock Response Spectrum (SRS) of the resonant board are explored carefully. The rules achieved in this paper are verified by a typical example. The results indicate that the improved simulator can avoid the danger of explosive and make full use of the advantage of actual explosive excitation. And the test condition can be quickly realized at the simulator according to the effect rules of the three adjustable parameters.     

静压延时矫直策略在头部翘曲板材矫直过程中的应用

随着厚规格、高强度品种钢的大量开发,头部翘曲成为中厚板生产过程中的一种常见缺陷,同时国产化的矫直机矫直能力不足,使得头部翘曲板材矫直过程困难。以某板卷厂开发厚规格、高强度品种钢过程中,频繁出现头部翘曲呈蛇形问题为依托,采用弹塑性差分的曲率积分方法,分析头部翘曲板材的传统矫直策略中残余曲率与矫直力的变化,讨论传统矫直策略和静压延时矫直策略的选择原则,研究静压延时矫直工艺。某板卷厂现场证明:静压延时矫直可以有效解决头部翘曲板材矫直问题,同时改善板材的板形。     

轻型自主爬行制孔系统集成控制技术

针对机身筒段大部件的装配需求,设计了由自主多足移动机构与多功能末端执行器两大功能模块组成的轻型自主爬行制孔系统。基于集成控制的总体需求,设计了上下位机分层控制体系。利用Microsoft Visual Studio平台开发了上位机集成控制软件,用以规划整个钻铆系统的加工任务,监测现场加工任务的执行情况。利用德国倍福软PLC技术实现对整个系统终端硬件的实时控制。在明确了集成控制的总体方案后,设计了基于工业网络的硬件组态和基于多软件平台的软件组态。最后,在不同倾斜角度的曲面工装上进行了机器人的行走和钻孔试验。试验结果表明轻型自主爬行制孔系统结构设计合理,集成控制系统性能稳定,能够稳定实现行走和钻孔功能,制孔质量满足要求。