飞行器太阳能源计算方法CSCD

介绍了空间飞行器典型电源系统组成,通过对影响太阳能源输出的各项参数因素分析,提出了空间飞行器太阳能源计算方法,该方法包括由功率计算所需太阳阵面积的公式和由太阳阵面积计算输出功率的公式,达到了准确计算太阳能源的效果,解决了以往空间飞行器太阳能源估算误差大,在总体回路设计中电源参数难以闭环的问题。     

基于多软件的STK模型转换应用研究

针对STK(Satellite Tool Kit)/VO模块中所使用三维模型格式(*.mdl)的特殊性,首先阐述了转换STK模型的途径,接着就如何利用各种3D模型制作和转换软件,将通用格式的三维模型转换成STK模型进行方法分析,重点研究了在国内应用广泛的*.max格式模型向STK模型的转换。     

Development and verification of ground-based tele-robotics operations concept for Dextre

The Special Purpose Dextreous Manipulator (Dextre) is the latest addition to the on-orbit segment of the Mobile Servicing System (MSS); Canada's contribution to the International Space Station (ISS). Launched in March 2008, the advanced two-armed robot is designed to perform various ISS maintenance tasks on robotically compatible elements and on-orbit replaceable units using a wide variety of tools and interfaces. The addition of Dextre has increased the capabilities of the MSS, and has introduced significant complexity to ISS robotics operations. While the initial operations concept for Dextre was based on human-in-the-loop control by the on-orbit astronauts, the complexities of robotic maintenance and the associated costs of training and maintaining the operator skills required for Dextre operations demanded a reexamination of the old concepts. A new approach to ISS robotic maintenance was developed in order to utilize the capabilities of Dextre safely and efficiently, while at the same time reducing the costs of on-orbit operations. This paper will describe the development, validation, and on-orbit demonstration of the operations concept for ground-based tele-robotics control of Dextre. It will describe the evolution of the new concepts from the experience gained from the development and implementation of the ground control capability for the Space Station Remote Manipulator System; Canadarm 2. It will discuss the various technical challenges faced during the development effort, such as requirements for high positioning accuracy, force/moment sensing and accommodation, failure tolerance, complex tool operations, and the novel operational tools and techniques developed to overcome them. The paper will also describe the work performed to validate the new concepts on orbit and will discuss the results and lessons learned from the on-orbit checkout and commissioning of Dextre using the newly developed tele-robotics techniques and capabilities.     

贴壁方柱湍流场TR—PIV实验研究

采用时变粒子图像速度场测试技术（TR—PIV），对低速循环水槽中贴壁二维方柱绕流湍流场进行了细致的测量。通过对实验得到的30000个连续瞬态速度场进行分析，得到了时均速度场和流线图谱，以及流向、法向速度分量的脉动强度场和涡量场。此外，对脉动速度时序信号进行谱分析，得到了流场中低频大尺度相干结构脱落频率。通过对瞬态速度场的分析，揭示了贴壁方柱绕流的旋涡脱落及其发展过程。     

基于协作机械臂的航电开关柔性检测算法

在基于协作机械臂的航电联调联试系统中,为了解决机械臂在检测航电开关时存在环境复杂、需要适应不同种类开关与定位误差等问题,提出了两种基于关节力传感器的航电开关柔性检测算法,用来检测航电联试环境中主要的3大类开关.基于外力阈值检测的接触定位与操作算法,通过广义动量观测器估计末端外力,并在控制机械臂运动时设置操作力阈值,实现...     

A new efficient technology of aerodynamic design based on CFD driven optimization

This paper describes a new technology of aerodynamic design based on CFD driven constrained optimization to minimum drag. Within an aircraft development project we focus on the aerodynamic design of wings and show how the design process has been advanced with the new capabilities achieved through the use of the recently developed in-house optimization tool OPTIMAS. The optimization method of the present work is based on the use of Genetic Algorithms and accurate full Navier–Stokes drag prediction. The results include a variety of optimization cases for aerodynamic design of transport-type aircrafts.     

Study on electrodynamic tether system for space debris removal

As a countermeasure for suppressing space debris growth (P. Eighler, A. Bade, Chain Reaction of Debris Generation by Collisions in Space—A Final Threat to Spaceflight? in: 40th Congress of the International Astronautical Federation, IAA-89-628, October 1989), the National Aerospace Laboratory of Japan is investigating a satellite capture, repair and removal system for non-cooperative satellites, part of which involves assessing the viability of electrodynamic tether (EDT) technology as an orbital transfer system. In this paper, some results concerning the time required to remove existing satellites, the behavior of flexible tethers during the debris separation phase, and orbital transfer strategies of EDT systems during space debris removal operations are described. From numerical simulations, it is found that EDT systems can transfer satellites from LEO to orbits with a short lifetime within a realistic timeframe. It is also found that the stability of EDT systems is compromised when debris separation occurs both while a tether current is running and when the ratio of the end mass to that of the service satellite is high. To ensure stability, the end mass should be selected from the target debris group with due regard for the maximum possible mass that can be maneuvered safely. Moreover, it is also found that orbital elements (a, e, i) can be changed independently with an adequate current control strategy.     

贫燃熄火实验预测方法综述

贫燃熄火（Lean Blowout，LBO）属于一类特殊的不稳定燃烧现象，往往导致严重后果。因此，及时准确地预测出贫燃熄火现象是实现燃烧稳定性控制的一个重要前提。本文综述了2000年以来，基于化学发光信号、可见光谱颜色信号、温度信号、声压信号和离子电信号预测LBO的原理，以及其采集方式和各自特点。接着介绍了将这些信号进行分析处理得到控制参数的5类方法，分别为统计法、阈值-事件法、频谱法、符号法和非线性动力学法，将这些方法进行综合比较，评价了其预测效果。最后从实际应用的角度出发，对贫燃熄火检测技术的未来发展提出展望。     

不同流速比超声速混合层气动光学效应研究

针对不同流速比混合层流场气动光学效应问题，首先采用大涡模拟数值方法进行了数值仿真，其次用光线追迹方法进行了气动光学效应仿真，最后对混合层的气动光学效应进行了评价。结果表明，混合层流场涡结构与光程差极小值存在一一对应关系，并且其流速比低的混合层气动光学效应更加严重。同时，研究了不同光学参数对斯特列尔比的影响，得到了相应的规律。