Development of an operational fitness test for the Royal Air Force

Since 2002, the Royal Air Force (RAF) has been working towards developing role-related physical tests for use as an operational fitness test (OFT). The purpose of this study was to establish reliability of the OFT (comprising four tests), investigate gym-based tests as predictors of performance and establish performance standards. Fifty-eight RAF personnel performed the OFT on three occasions. A separate cohort carried out fitness and anthropometric tests before performing the OFT, by way of establishing performance predictors. Documented evidence and views of an expert panel were used to determine OFT standards. Reliability ranged from moderate to good for three tests, with one test (Dig) showing poor reliability. The 95% limits of agreement for the prediction models ranged from good to poor (6.7–34.2%). The prediction models were not sufficiently accurate to estimate confidently OFT performance, but could be used as a guide to quantify likely outcome and training needs.     

Development of an operational fitness test for the Royal Air Force

Since 2002, the Royal Air Force (RAF) has been working towards developing role-related physical tests for use as an operational fitness test (OFT). The purpose of this study was to establish reliability of the OFT (comprising four tests), investigate gym-based tests as predictors of performance and establish performance standards. Fifty-eight RAF personnel performed the OFT on three occasions. A separate cohort carried out fitness and anthropometric tests before performing the OFT, by way of establishing performance predictors. Documented evidence and views of an expert panel were used to determine OFT standards. Reliability ranged from moderate to good for three tests, with one test (Dig) showing poor reliability. The 95% limits of agreement for the prediction models ranged from good to poor (6.7-34.2%). The prediction models were not sufficiently accurate to estimate confidently OFT performance, but could be used as a guide to quantify likely outcome and training needs.     

Unmanned Aircraft Flights and Research at the United States Air Force Academy

The United States Air Force Academy is actively involved in unmanned aircraft research across numerous departments involving many projects, aircraft, government agencies, and experimental programs. The importance of these research projects to the Academy, the faculty, the cadets, the Air Force, and to the defense of the nation cannot be understated. In an effort to be proactive in cooperating with recent concerns from the FAA about the growth and proliferation of UAS flights, the Air Force has implemented several new guidelines and requirements. Complying with these guidelines, directives, and regulations has been challenging to the researchers and research activities conducted at USAFA. Finding ways to incorporate these new guidelines effectively and efficiently is critical to research and participation in joint projects and exercises. This paper explores the nature of research at USAFA current restrictions imposed by the various regulations, the current process, short term solutions, and a long term vision for research into UAS at the Academy.     

基于Multi-Agent的通航飞行行为仿真分析

为了探索航空器在低空环境中的飞行特点,本文利用智能体(Agent)思想,构建了基于Multi-Agent的通航飞行行为模型,并建立了低空环境下的冲突解脱模型.探究其运行环境,构建多种类通航Agent及内部逻辑框架,借助Netlogo软件对所建模型进行了仿真实验.结果表明,低空环境下,通航飞行量与冲突数、安全间隔都存在一...     

四旋翼无人直升机鲁棒飞行控制

讨论了四旋翼无人直升机的飞行控制问题,提出了一种鲁棒控制器设计方法.该控制器由内环姿态控制器和外环位置控制器两部分组成,姿态控制器采用基于信号补偿的鲁棒控制方法,位置控制器由经典的PD控制实现.将该控制器用于实验室自主研制的四旋翼无人直升机系统,实现了室内悬停飞行.实验结果验证了该控制方法的有效性.     

某型舰载直升机飞行模拟器飞行仿真系统设计

对某型舰载直升机飞行模拟器飞行仿真系统进行了设计研究.给出了某型舰载直升机飞行模拟器飞行仿真系统的模型框架.定义了建模过程中所涉及的主要坐标系,研究与分析了与主旋翼相关的诱导速度、挥舞角、拉力、扭矩的计算方法,给出了舰载直升机部件气动建模思路.最后,结合舰载直升机数据,对直升机飞行模拟器飞行仿真系统对舰载机飞行员的操纵响应进行了仿真分析.设计的舰载直升机飞行模拟器飞行仿真系统已经成功应用到了某型舰载直升机飞行模拟器上,具有仿真度高、实时性好等特点,起到了良好的训练效果,得到了舰载直升机飞行教员和学员的认可.     

一种新型模拟肺模型的实验研究

建立了一种新型的可用于呼吸机性能测试的玻璃瓶模拟肺模型,通过物理推导得到模拟肺的顺应性与玻璃瓶的大小及其内部温度有关,并用相关的实验证明了模型的可行性.研究表明:在恒温条件下其顺应性与玻璃瓶的大小成比例关系;在玻璃瓶内放入一定量的铜网可以使其在一定的频率下保持恒温状态,这种模拟肺可用于精确测试呼吸机特性.     

Local networking at the Royal Bank of Scotland

Data communications facilities are vital if essential banking operations are to be computerized; branches and head offices that are dependent upon terminals and corporate data to fulfil their functions must have access to such facilities. Back-up facilities are also essential if normal bank functions are not to be disrupted should a fault develop. Investigations that led to the installation of Hyperchannel at the Royal Bank of Scotland are described and the problems to which Hyperchannel provided the solutions are examined. The implementation of the system and plans for future development are discussed.     

微扑翼飞行器控制系统相关技术研究进展

微型扑翼飞行器(FMAV)由于微型化和采用扑翼飞行方式的特征,许多传统理论和设计方法不再完全适用,相关理论和技术仍在不断地发展中,所以对国内外相关理论和技术的发展现状进行及时跟踪和研究,具有非常重要的参考意义;通过调查研究,介绍了与微型扑翼飞行器控制系统有关的低雷诺数非定常空气动力学、控制系统数学模型、控制方案和控制方法等的研究进展,总结出了微型扑翼对飞行器控制系统的设计要求,控制系统的特点和需要解决的关键问题,并展望了未来发展趋势。     

UC安全性证明中模拟器构造方法研究

在UC模型(通用可组合安全分析模型)中密码协议安全性证明的难点是模拟器的构造,而目前模拟器的构造没有通用有效的方法可循,针对这一问题,提出了一种构造模拟器的通用有效的方法.研究了UC模型的构建原理,分析了UC安全性的本质要求,指出了符合UC安全性本质要求的模拟器存在条件以及模拟内容,在此基础上,阐述了构造模拟器的方法,并给出了该方法的正确性分析.为正确使用UC模型进行密码协议的UC安全性证明提供了切实可行的方法.     

空战战法训练系统目标机飞行轨迹实现

空战战法训练系统是运用仿真手段对指挥员和飞行员进行空战战法训练的虚拟系统,在该系统中,目标飞机的运动及其飞行轨迹生成是关系到系统成败的关键环节。首先分析确定了生成基于现有战法的目标飞机飞行轨迹的步骤;然后针对敌方飞机数据缺乏的实际状况,结合训练系统设计,在保证系统要求的前提下给出了考虑飞行极限参数的简化目标机仿真模型;根据现代空战特点选定了空战机动动作集,并设计了动作库;最后给出了根据时间步长推算的飞行轨迹简化计算模型。经实际检验,该模型可以有效地满足空战战法训练系统的需要。     

基于Agent的海军航空兵突防作战仿真研究

航空兵作战中的突防过程决定着作战任务能否顺利完成。在研究海军航空兵突防作战过程的特点的基础上,建立了基于多Agent的作战仿真模型,分析了Agent间的通信过程及指挥所Agent的推理决策过程,并构建了相应的模型。该研究为以后进一步开展多Agent系统的研究打下了基础,对海军航空兵作战仿真研究也具有一定指导意义。