Multi-input,multi-output flight control system design for the YF-16 using nonlinear QFT and pilot compensation

Nonlinear quantitative feedback theory (QFT) and pilot compensation techniques are used to design a 2 × 2 flight control system for the YF-16 aircraft over a large range of plant uncertainty. The design is based on numerical input-output time histories generated with a FORTRAN implemented nonlinear simulation of the YF-16. The first step of the design process is the generation of a set of equivalent linear time-invariant (LTI) plant models to represent the actual nonlinear plant. It has been proven that the solution to the equivalent plant problem is guaranteed to solve the original nonlinear problem. Standard QFT techniques are then used in the design synthesis based on the equivalent plant models. A detailed mathematical development of the method used to develop these equivalent LTI plant models is provided. After this inner-loop design, pilot compensation is developed to reduce the pilot's workload. This outer-loop design is also based on a set of equivalent LTI plant models. This is accomplished by modelling the pilot with parameters that result in good handling qualities ratings, and developing the necessary compensation to force the desired system responses.     

A method of identifying latent human errors in work systems

Work system improvements are implemented in various manufacturing processes to prevent problems caused by human errors. However, they are almost always applied to problems which have already occurred. This paper examines a method of identifying latent human errors existing within the work systems beforehand. A procedure for applying failure mode and effect analysis to this identification problem was defined based on over 1000 empirical errors: a work system decomposition criterion and fundamental error modes for listing latent human errors, and then applied to three practical manufacturing processes in order to evaluate its effectiveness.     

SiC（w）／TZP＋mullite陶瓷复合材料界面和组成设计与力学性能

本文从理论上分析了ＳｉＣ（ｗ）ＴＺＰ＋ｍｕｌｌｉｔｅ（ｐ）复合材料界面残余热应力及其在基质内的分布规律。提出在ＳｉＣ（ｗ）表面涂复Ａｌ２Ｏ３和在ＰＺＴ中加入ｍｕｌｌｉｔｅ（ｐ）联合作用来降低晶须／基质界面残余热应力的界面设计方案，导出ＳｉＣ（ｗ）和ｍｕｌｌｉｔｅ（ｐ）协同补强ＰＺＴ的匹配条件。制备了ＳｉＣ（ｗ）／ＴＺＰ＋ｍｕｌｌｉｔｅ（ｐ）复合材料并了ＳｉＣ（ｗ）表面涂层Ａｌ２Ｏ３厚度和ＳｉＣ（ｗ     

面向表面微加工工艺的微器件设计框架的研究

本文以微器件设计为对象，对微硅表面制造驱动的微器件并行设计方法学及相应的计算机辅助设计工具的开发逻辑进行了研究，提出了采用基于三层Web-ASP集成框架实现e-CAD原型工具的编程方案，其中，并行任务流管理与控制，微器件实例及设计资源库，微加工工艺规划及仿真，微器件设计评价等是该系统实现的关键要素，在此基础上将建立网上微器件设计中心，并通过应用服务机制，实现对微器件设计工具使用的商务化，以达到降低设计成本，加快MEMS产业化之目的。     

关于后张预应力混凝土结构优化设计的几个问题

结合UP软件编程实践，本文对后张预应力混凝土结构计算程序中引入优化功能的意义进行了论述，提出了预应力筋与普通钢筋之间的最优搭配关系，优化原点概念及相关影响因素，列出了优化计算程序所应涉及的基本计算内容，并对当前后张预应力混凝土结构设计中的一些观点提出了不同意见。     

敏捷夹具构型设计系统的体系结构、知识表达与推理策略

介绍了敏捷夹具系统的基本特征，提出了敏捷夹具构型设计系统的体系结构，论述了敏捷夹具构型设计的知识表达、推理策略及其实现方法。     

10万t/a甲醇装置的设计及变更实践

介绍了10万t/a甲醇装置设计与变更的指导思想，变更内容及实际运行情况。实践证明，变更后工艺流程更加合理，各项消耗指标优于设计值。     

自旋式脱接器在临盘油田的应用

为保障临盘采油厂的大泵井正常生产 ,购进了自旋式脱接器。这种脱接器由上体和下体两部分组成 ,上体包括轨道管和轨道套 ;下体包括接头、挡圈、弹簧、滑套和中心杆。自旋式脱接器可在任意位置和角度对接和脱开 ,对接和脱开时只需下放和上提抽油杆柱即可完成。当泵砂卡时 ,左旋抽油杆柱即可脱开 ,解决了砂卡井脱接器不能脱开的难题。该脱接器可重复对接12 0次以上 ,耐疲劳寿命 7× 10 7次以上     

无油润滑压缩机活塞环和支承环设计

通过对填充聚四氟乙烯材料活塞环及带卸荷槽结构支承环的研究 ,确定了活塞及活塞环结构 ,建立了带卸荷槽支承环的力学分析模型 ,并将其结果用于结构尺寸的确定。在压缩机工艺指标不变的情况下 ,用该方法设计的活塞环和支承环性能优良。     

高速往复式内燃机平衡轴低质量设计分析

分析了扇形和偏心圆两种平衡轴设计的要求以及平衡重低质量的设计原则。扇形平衡重半径及宽度应尽量大、夹角应尽量小。偏心圆平衡重的偏心圆半径应尽可能大 ,轴承半径应尽可能小。同样质量的扇形平衡重产生的平衡力比偏心圆平衡重要大。