GL Studio在飞机虚拟地勤训练中的应用

虚拟现实技术应用到飞机地勤人员培训是一种经济,高效的方法.针对飞机虚拟地勤维护训练系统中座舱视景仿真的难点问题,采用GL Studio仪表建模工具建立座舱仪表模型,Vega视景驱动软件进行实时驱动的方法.对GLStudio仪表建模的关键技术进行研究,并分析Vega的底层软件开发原理,解决GL Studio建模及把GL Studio模型植入Vega的难题.     

土石方工程对山区公路工程造价的影响

在山区公路工程造价中, 土石方工程、路基工程、路面工程、桥涵工程、隧道工程等都是非常重要的组成部分, 但土石方工程是非常灵活且繁琐的, 文章从两个大类分析了土石方对工程造价的影响, 一方面是土石方的分类、调配、利用, 另一方面是在实际编制造价过程中工程量及定额套取问题。     

旋转整流器的换相过程分析

阐述了无刷励磁发电机的旋转整流器在正常工况下的工作原理和换相过程,根据换相电抗和负载电阻的关系将换相过程分类,并通过理论解析了旋转整流器在正常工况下的换相电流波形。通过仿真验证了理论分析的正确性,为无刷励磁发电机系统的相关研究提供一定的理论依据。     

Energy management and design optimization for a series-parallel PHEV city bus

Series-parallel PHEV city buses combine the advantages of series and parallel configurations and have been used in China. However, the design and energy management of series-parallel PHEV city buses based on Chinese driving conditions still need to be investigated. In this paper, an equivalent consumption minimization strategy is provided to optimize energy management for series-parallel PHEV city buses, and the process of the equivalent consumption minimization strategy for series-parallel is presented in this paper. Compared with the validated rule-based energy control strategy, ECMS shows a fuel economy improvement of 8.2 % in the CBCD (Chinese Bus Driving Cycle). Based on the optimal energy management, a design for a generator motor in the series-parallel configuration has been processed. The fuel consumption has been shown to decrease, with an increase in generator power, because the system with the higher generator power can work at a higher efficiency in the series mode and operate the engine in the high efficiency area in the parallel mode. Besides, in terms of costof- ownership for a PHEV bus for lifetime of 8 years, although the high generator power will lead to high purchase cost for series-parallel PHEV bus, a series-parallel PHEV city bus with a generator of 100 kW maximum power will still show small advantage in cost-of-ownership, based on current motor price and natural gas price.     

数显轮径尺使用中的问题及建议

针对车辆维修作业人员提出的数显轮径尺使用中存在的问题，进行现场分析，提出解决问题的办法和建议，保证计量器具的检测准确度。     

经过演变的广州城市轨道交通网络规划

介绍广州市城市轨道交通线网规划的发展及线网架构和功能等级的划分，综述了线网规模规划、系统规划、系统选型及资源合理配置。     

往复流散热方式的锂离子电池热管理

为解决电池模块内部单体电池间的温度不均匀性而影响电池的使用性能和寿命的问题,本文中采用了一种往复流冷却方式,使冷却空气流动方向周期性逆转,以降低单向流空气冷却方式时单体电池沿空气流方向的温度梯度。结果表明,采用往复流冷却方式后,在1C和13.33C放电倍率下,电池温度均匀性分别提高了12.1%和62.4%,电池模块的使用性能和安全性得到改善,电池使用寿命得以提高。同时,文中还利用计算流体动力学虚拟试验与正交优化相结合,对影响往复流散热性能的往复流入口的速度与温度和往复周期3个参数进行了优化,并揭示了它们对电池最高温度和温差的影响规律。     

Flexural experimental study on continuous reinforced concrete beams strengthened with basalt fiber reinforced polymer/plastic

This paper discusses a new fibrous composite known as continuous basalt fiber reinforced polymer/plastic (BFRP). Compared with other fiber reinforced polymer/plastic, BFRP has many advantages, such as ductility, high thermal resistance, corrosion resistance and economic cost. To test mechanical properties and failure modes of flexural members strengthened with BFRP, flexural experiment is conducted on four two-span T-section continuous beams strengthened with BFRP and one un-strengthened comparative beam. The experimental result shows that the strengthened beams perform remarkably in terms of yield strength, ultimate strength and ductility. BFRP has good prospects in retrofitting and strengthening of concrete structures which require good ductility and corrosion resistance.     

城市轨道交通客流规模影响因素分析

客流规模是决定轨道是否建设的决定性因素.以广州市的轨道交通发展为例,借鉴国外一些城市的先进经验,从沿线土地利用、城市经济水平、城市中心区潜在的增长前景、自行车-公共汽车的联运、有效的城市管理、高效的经营等6个方面对影响客流规模的因素进行了阐述.一般的客流预测量往往偏高.而实际影响客流规模的因素大都较难把握.     

基于DDS中间件的性能测试

DDS中间件是一种轻便的、能够提供实时信息传送的中间件技术,该文以OpenSplice DDS中间件为例,研究了其通信过程,介绍了其为实现实时数据分发服务提供的图形化建模工具DDS Power Tools,并设计应用对其实时和吞吐性能进行了第三方测试。