飞行器

In allusion to the condition on the aircraft visual locating, a method based on Kalman filter to study aircraft position and movement parameter of image sequences is proposed.

针对飞行器的视觉定位问题，提出了基于卡尔受滤波技术的序列图像飞行器位置和运动参数进行研究的方法。

Then shape optimization under the rarefied flow conditions becomes very important in order to improve the vehicle's performance.

因此高速飞行器在稀薄条件下的外形优化对于提高飞行器的性能尤其重要。

It is the main aspects of developing of FMS to raise the frequency respondency, accuracy, robustness, and reliability, from the view of the development tendency for the flight control system simulation in the world.

它可以真实地模拟飞行器在空间的各种姿态，为各种飞行器的改进和再设计提供各种参考依据，其性能直接影响到地面仿真的真实程度。

In comprehensive consideration of flight vehicle system constraints,trajectory design,aerodynamic characteristics and solid rocket booster design,a series of system/aerodynamics/trajectory/solid propellant integration design analysis and optimization models for solid rocket booster of flight vehicle were derived.

综合考虑飞行器总体设计约束、轨道设计、气动特性与固体火箭助推器设计间相互影响的情况下，建立了飞行器固体火箭助推器总体/气动/轨道/动力多学科的系统分析模型和设计优化模型。

Because the flying environment aircraft confronted with is very large and complex, and many kinds of constraints should be considered in the process of route planning, route search algorithm becomes the most challenging problem in route planning.

由于飞行器的飞行环境异常复杂庞大，约束条件众多且模糊性大，各因素之间存在强耦合，因此航迹规划算法成为飞行器任务规划中最具挑战性的问题。

In order to satisfy the guidance task of Suborbital Launch Vehicle, based on the SLV s plane symmetry lifting body figuration, the SLV selects the straight slope formal attack angle, mending the guidance of Launch Vehicle.

为了更好地满足亚轨道飞行器的制导任务需求，基于亚轨道飞行器面对称的升力体外形，采用直线斜率形式的迎角变化规律，改进了现有的运载火箭制导方法。

In this paper a Nonlinear Variable Dimension Estimator is proposed for tracking maneuvering spacecraft. Two process models were incorporated by the Unscented Kalman Filter to account for the dynamic uncertainties of the target of interest: a nonmaneuvering model based on the two body problem and a maneuvering model taking the forced acceleration as the unknown system input to be estimated.

当飞行器处于无机动的巡航状态时，无色卡尔曼滤波器使用常规的二体问题模型描述其运动规律，而当飞行器被认为开始机动后，滤波器将扩展系统的状态空间，将机动加速度作为状态变量进行估计，从而增加了模型的适应性。

In the recent 10 years, at the three special fields of dynamic aerodynamics, although the circumferential Reynolds number gap between wind tunnel free flight and its corresponding real flight is as high as one or two magnitudes, wind tunnel free flight experiment results succeed in predicting or reproducing the dynamic aerodynamic characteristics in the three special fields, which appear in the real flight phase producing severe effects on flight security and flight performance.

近10余年来，在3个动态气动专题领域内，地面风洞自由飞实验与对应的天空飞行器的绕流雷诺数虽然相差1～2个量级，但风洞自由飞实验结果多次预测或再现了天空飞行器出现的对飞行安全、飞行性能产生严重影响、其它地面风洞实验方法难以预测或再现的这3个专题领域内的动态气动特性，这至少为3个专题领域内天地动态气动相关中的雷诺数影响，提供了一个新的理解。

Just under this background, studying on the flight mechanism of flapping-wing MAV and sample fabrication from the bionics are conducted in this dissertation. The kinematics equations of insect wings can be acquired by the observation and measurement on the natural insect in researching paper. The geometry model of insect is established by UG technology. The three dimensional grid during the insect moving in the flow field is achieved which adopted grid generation method. The characteristic of lift and drag are attained by simulation the surround flow field during the locomotion of wings, and the flight mechanism of insect is discussed. Based on this study, the physical flapping-wing MAV is fabricated by the acquirable materials and parts of apparatus in existence.

正是在这一背景下，本文从仿生的角度来研究微型飞行器的飞行机理与样机制作；通过查阅文献中对自然界中昆虫翅膀运动的观察与测量，获取了昆虫翅膀的运动方程；采用UG建模技术，建立昆虫的几何模型；采用网格划分方法，获取昆虫在流场运动时的三维网格；运用CFD方法模拟翅膀运动时周围的流场，获取昆虫运动时的升阻力特性，进而来研究昆虫的飞行机理；在此基础上，通过现有可用的材料加工制作仿生微型飞行器。

The paper introduces the launch modes and characteristics of the high speed and low speed near space aerocraft.

介绍了高速临近空间飞行器和低速临近空间飞行器的发射方式和特点。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新