This paper proposed a robust liquid metal based microheater for high temperature applications.Generally,Eutectic Galliun-Indium(EGaIn)has been widely used to fabricate resistive microheaters in microf
Zeolites have great potential in adsorption and separation of alkane-olefin mixtures with similar properties due to their shape selectivity and huge specific surface area.To separate allyl chloride fr
Learning from nature has inspired the creation of intelligent devices to meet the increasing needs of the advanced community and also to better understand how to imitate biology.[1-3] As one of biomim
In this study,the flow and heat transfer characteristics of microchannel heat sink(MCHS)with manifold arrangement and secondary channels are numerically investigated.Three dimensional finite volume mo
Research on Microfluidics and Nanofluidics has advanced rapidly over the past two decades,which is a cutting-edge subject and has great application potential in biochemistry,human health,new energy,ad
A numerical research on flow regime transition of R134a in horizontal microchannels was conducted.The model was based on the volume of fluid approach and user-defined routines.The observed annular flo
随着太空开发的不断深入，空间机器人的技术要求也越来越高。双臂空间机器人系统相较于单臂空间机器人系统，其承载负荷抵抗变形能力更强、执行任务性能更稳定、定位精度更高，因此其控制方法的研究也成为热点。漂浮基空间机器人是一个非线性、强耦合性和时变的系统，其控制技术比较复杂。考虑到双臂机器人系统的干扰性和不确定性，全局状态向量不完全可测。
为实现两个飞行器间的在轨补加任务,可通过主飞行器携带的空间机械臂直接捕获、抓取目标飞行器,然后转位到补加对接口,进行对接补加,从而避免直接交会对接过程中两飞行器的剧烈碰撞[1-2].由于两个飞行器质量惯量参数相近,转位过程中组合体的质心和转动惯量等质量参数的大范围变化[3],主飞行器姿态控制较为困难.本文根据机械臂抓捕位置和两飞行器对接方向,规划机械臂转位路径,确定系统结构和参数,并分析无控状态下
本文以航天器远程交会对接为背景，应用三向独立推力模型对航天器远程交会进行了研究。在以往对连续推力下航天器交会对接的研究中，尽管总推力是Bang-Bang 控制，但推力的仰俯角和偏航角是连续可变的，尤其是推力为连续大推力情形下，推力的最优控制过程是难以实现的。