As the incubator company for the metro cars manufacturing in china and one of the first groups of metro trains producers in china , this company has shown much advantage in the area of the r d of urban rail vehicles 同时拥有一大批制造经验丰富的技术工人。长客股份公司在新型铁路客车动车组以及城市轨道车辆的研制生产方面居于国内领先水平。
This article takes the motor of the railway carriage air conditioner as the study object . the application is based on embedded system and studies the traditional control theory in detail 。 in this paper , the article points out the shortcuts of the old method 本文以铁路客车空调风机为研究对象,在嵌入式系统的基础上,对传统的pid控制理论进行了详细的分析研究,并且指出其中存在的不足。
Acoustic properties of space inside a railcar are analyzed based fem when frequencies are lower : 1 acoustic modal inside the railcar is calculated whether coupled or uncoupled with shell of railcar , 2 acoustic field inside the railcar is calculated when a force is given 针对某型铁路客车应用有限无法在较低的频率范围内对客车车内的声学特性进行了研究分析，得出了客车车内流体自身的模态和液体与车体耦合后车内流体的模态，并在给定激励下计算了客车车厢内部的声场。
The products of the joint venture company mainly include : to make full use of the advanced technical stage provided by both parent companies to design for its clients and manufacture air - conditioning systems of all kinds of railway vehicles , such as the air - conditioning systems , hydraulic pressure systems and other accessory products of locomotive , railway passenger , subway , lrv and high - speed train 合资公司的主要产品是：利用双方母公司提供的先进技术为平台，为客户设计、制造各类铁路的车用车辆空调系统，如：机车、铁路客车、地铁、轻轨、高速列车的车用空调系统、液压控制系统和其它附属产品。
Nevertheless as the import of civil aviation aircraft will have passed it peak , along with the uncertainty of new investment plans for the hi - tech industries and a rise in comparative base , it is estimated that private investments in 2006 will gradually decline . on the other hand , governmental investments driven by expanded public infrastructure construction planning will continue to grow , while investments in state - run enterprises will decrease due to privatization 民间投资方面，虽飞机及铁路客车等大宗运输工具进口较去年同期缩减，然营建工程却在房地产景气持续热络带动下，成长良好机器设备则因进口资本设备增加，也有不错的成长，整体民间固定投资成长在2006年第三季达到5 . 6 。
In the paper , through measurements of interior noise of existing railway vehicles in china , studies propagation routes and distributing characteristics , puts forward to the distributing rules of interior noise in different statuses and speeds , gets the main frequency band , it benefits to noise abatement and reduction design of existing and high - speed railway vehicles 摘要运用多通道噪声测试与分析系统，对运行中的铁路客车进行了多点同步车内噪声测试和分析，得出了在不同工况和不同运行速度时的车内噪声的现状和分布规律，确定出车内噪声发生的主频带，对既有线铁道车辆和将来的高速铁道车辆进行防噪降噪设计具有较高的参考价值。
