Implementation of tactical maneuvers with maneuver libraries

This study creates and combines the general maneuver libraries for fixed-wing aircraft to implement tactical maneuvers. First, the generalized maneuver libraries are established by analyzing the characteristics of tactical maneuvers required in battlefields. The 7th order polynomial is applied to both the creation of the maneuver libraries and the generation of the trajectories or flight paths for modal inputs. To track the desired trajectory, we design the Attitude Command Attitude Hold (ACAH) system and the Rate Command Rate Hold (RCRH) system using Model Following Controller (MFC). Moreover, the Line-of-Sight (LOS) guidance law is designed. In particular, the CONDUIT® is employed to optimize the gains so that the control systems meet the aircraft Handling Qualities (HQ) criteria. Finally, flight simulations are performed for the longitudinal loop, immelmann-turn, and climb-slalom-descent maneuvers to verify that tactical aggressive maneuvers are realizable via the combination of maneuver libraries. This study can contribute to the development of flight techniques for aircraft tactical maneuvers and to the revision of air force operational manuals.     

课表编制工作探讨

在高等教育深化改革的今天，使得课表编制工作的复杂程度越来越高。在这种新形势下，如何才能编制出科学、合理、高效、周密的课表，以达到建立优良的教学秩序和教学环境，提高教学质量的目的，这是高校教学管理工作者急需认真研究的问题。     

飞机主操纵系统疲劳试验载荷谱小操纵位移频次问题研究

针对飞机全机主操纵系统疲劳试验载荷谱中小操纵位移频次影响问题进行了分析和讨论,确定了某机全机主操纵系统小操纵位移频次的级别。同时,在原某机全机主操纵系统疲劳试验载荷谱的基础上再次对其小操纵位移频次进行了计算,去掉了这一级别以下对全机主操纵系统疲劳试验无影响的小操纵位移频次,从而完善了主操纵系统疲劳试验载荷谱。另外,对小操纵位移频次问题研究结果在其全机主操纵系统疲劳试验中的实施效果进行了阐述。     

自适应控制方法的直接命中目标本体的平行接近制导律

本文在最少量测条件下采用视线角速度ｑ趋于零的指标函数和低阶等效辨识模型与快速自适应控制方法实现了战术导弹的平行接近制导律。这种最优制导律可以实现直接命中目标本体，实现一弹多用，可以用于反导弹的控制。能使制导装置简化并使其尺寸和重量减小，算法简单易于工程使用。经过大量数学和半实物仿真试验表明，上述成果可应用于实际工程当中。     

FY-1C/D极轨气象卫星及其在轨运行

简要说明了风云一号(FY-1)极轨气象卫星的总体情况。介绍了FY-1C星运行5年。D星运行2年后的测控、电源、热控、敖传、扫描辐射计和星载数据收集与分发(DCDS)分系统、有效载荷空间粒子成分监测器。以及姿控和星载计算机的在轨运行情况。在轨测试结果表明，两星的在轨运行、功能和性能符合任务书的要求。最后总结了长寿命高可靠稳定优质业务运行的FY-1C，D星的创新点、主要成绩，并给出了部分应用情况。     

生态环境材料——社会可持续发展的物质基础

 生态环境材料是近年来在先进材料研究中提出的一个新研究领域。简要介绍了生态环境材料概念的产生、发展及哲学基础,从材料环境协调性评价、材料和物质的再生循环、与生态系统相协调的材料与工程、环境工程材料、与材料科学相关的生态工程等几方面对生态环境材料研究的最新进展进行了评述。     

A Possible Transfer Mechanism for the 11-Year Solar Cycle to the Lower Stratosphere

Observational evidence of the 11-year solar cycle (SC) modulation of stratosphere temperatures and winds from the ERA-40 dataset is reviewed, with emphasis on the Northern winter hemisphere. A frequency modulation of sudden warming events is noted, with warmings occurring earlier in solar minimum periods than in solar maximum periods. The observed interaction between the influence of the SC and the quasi biennial oscillation (QBO) on the frequency of sudden warmings is noted as a possible clue for understanding their mechanism of influence. A possible transfer route for the 11-year solar cycle from the equatorial stratopause region to the lowest part of the stratosphere is proposed, via an influence on sudden warming events and the associated induced meridional circulation. SC and QBO composites of zonal wind anomalies show anomalous wind distributions in the subtropical upper stratosphere in early winter. Mechanistic model experiments are reviewed that demonstrate a sensitivity of sudden warmings to small wind anomalies in this region. Various diagnostics from these experiments are shown, including EP fluxes and their divergence and also the synoptic evolution of the polar vortex, in order to understand the mechanism of the influence. Some recent GCM experiments to investigate the SC/QBO interaction are also described. They simulate reasonably well the observed SC/QBO interaction of sudden warming events and appear to support the hypothesis that tropical/subtropical upper stratospheric wind anomalies are an important influence on the timing of sudden warmings.     

恒温热源条件下实际回热式布雷顿循环的功率密度优化

计人工质与高、低温侧换热器和回热器的热阻损失、压气机和涡轮机中不可逆压缩和膨胀损失及管路系统中的压力损失，用有限时间热力学方法，导出了恒温热源条件下实际回热式布雷顿循环功率密度与压比间的解析式，借助于数值计算，研究了高、低温侧换热器和回热器的热导率分配对最大功率密度的影响。     

不同生命周期项目组合的约束资本预算优化模型及算法

文章给出了约束资本预算优化模型的一般数学表达式.根据詹姆斯*范霍恩的共同生命周期法的理论,提出了一种对不同生命周期项目组合的约束资本预算优化的新算法.通过算例,说明了新算法与原有算法的差别,结果表明新算法考虑了项目的重置,在满足各种约束的前提下,按照净现值指数的大小选择项目组合,从总体上寻优,得到的净现值总和更大,具有更为优化的特征.     

Families of halo orbits in the elliptic restricted three-body problem for a solar sail with reflectivity control devices

Solar sail halo orbits designed in the Sun-Earth circular restricted three-body problem (CR3BP) provide inefficient reference orbits for station-keeping since the disturbance due to the eccentricity of the Earth’s orbit has to be compensated for. This paper presents a strategy to compute families of halo orbits around the collinear artificial equilibrium points in the Sun-Earth elliptic restricted three-body problem (ER3BP) for a solar sail with reflectivity control devices (RCDs). In this non-autonomous model, periodic halo orbits only exist when their periods are equal to integer multiples of one year. Here multi-revolution halo orbits with periods equal to integer multiples of one year are constructed in the CR3BP and then used as seeds to numerically continue the halo orbits in the ER3BP. The linear stability of the orbits is analyzed which shows that the in-plane motion is unstable while the out-of-plane motion is neutrally stable and a bifurcation is identified. Finally, station-keeping is performed which shows that a reference orbit designed in the ER3BP is significantly more efficient than that designed in the CR3BP, while the addition of RCDs improve station-keeping performance and robustness to uncertainty in the sail lightness number.