配偶权在我国确立的利弊分析

关于配偶权的确立正反两派向来都是各执一词，笔者基于对配偶权浓厚的研究兴趣，收集和探析两派对配偶权的不同观点。本文尝试从确定配偶权的概念，正反两面关于配偶权确立的不同观点展开分析论述。     

Two freedom linear parameter varying μ synthesis control for flight environment testbed

To solve the problem of robust servo performance of Flight Environment Testbed(FET)of Altitude Ground Test Facilities(AGTF) over the whole operational envelope, a two-degree-offreedom μ synthesis method based on Linear Parameter Varying(LPV) schematic is proposed, and meanwhile a new structure frame of μ synthesis control on two degrees of freedom with double integral and weighting functions is presented, which constitutes a core support part of the paper. Aimed at the problem of reference command's rapid change, one freedom feed forward is adopted, while another freedom output feedback is used to meet good servo tracking as well as disturbance and noise rejection; furthermore, to overcome the overshoot problem and acquire dynamic tuning,the integral is introduced in inner loop, and another integral controller is used in outer loop in order to guarantee steady errors; additionally, two performance weighting functions are designed to achieve robust specialty and control energy limit considering the uncertainties in system. As the schedule parameters change over large flight envelope, the stability of closed-loop LPV system is proved using Lyapunov inequalities. The simulation results show that the relative tracking errors of temperature and pressure are less than 0.5% with LPV μ synthesis controller. Meanwhile, compared with non-LPV μ synthesis controller in large uncertainty range, the proposed approach in this research can ensure robust servo performance of FET over the whole operational envelope.     

影响粉末冶金刹车片硬度及磨损量因素的研究

从粉末原材料、粒度、形状及粒度组成、粉末化学成分、压制及烧结过程等方面,结合生产实际探讨影响了粉末冶金刹车片硬度及磨损量的因素,对生产实践具有一定的指导作用.     

定位环系列产品的工艺及模具设计

按定位环系列产品外径大小,设计了三种定位环系列产品压制模具结构,不仅结构合理,制造成本低,而且做到了一模多用。     

高校贫困生认定工作存在的问题与对策

高校的贫困生认定工作是国家助学政策落实的关键性环节,也是困扰高校贫困生工作的一项难题。随着我国高校的扩招,大学生中的贫困生人数也在不断增加,同时国家对贫困生的资助比例也有所提高,使得科学的认定贫困生成为迫切需要解决的问题。从贫困生认定的现状、存在的问题及优化的对策三个方面进行阐述。     

基于扩张状态观测器的高空台进气环境模拟控制技术研究

针对航空发动机高空台推力瞬变等过渡态试验对进气环境模拟控制系统所提出的强抗扰性、强鲁棒性的迫切需求,设计了一种基于扩张状态观测器（ESO）的高空台进气环境模拟主动抗扰控制技术方法。首先分析了现有高空台过渡态环境模拟的技术特点和高品质控制指标难于实现的原因;其次设计线性自抗扰控制器（LADRC）和一体化并行控制器（IPC）;最后通过仿真对高空台进气环境模拟主动抗扰控制方法进行了验证。结果表明,应用基于扩张状态观测器的主动抗扰控制技术能够大幅提高发动机过渡态试验中进气环境模拟的动态响应速度、控制精度和抗扰动能力。     

大气中N2O4/UDMH推进剂蒸发特性的研究

正确评估火箭爆炸后残留于地面的有毒推进剂形成的毒气的危害范围 ,关键问题之一是弄清楚渗入泥土中有毒推进剂的蒸发规律。介绍了 N2 O4/ UDMH推进剂在大气中蒸发的实验研究结果以及一种推进剂蒸发速率计算数学模型 ,实验结果与模型计算结果基本一致