Movements with Lateral Constraint

Abstract

The literature on terminal control tasks and continuous tracking tasks suggests a possible model for tasks where the subject must guide a vehicle at his own speed along a course defined by a tolerance band. The model predicts a linear relationship between the average velocity and the width of the tolerance band. Throe experiments are described which simulate vehicle guidance by pencil-and-paper experiments for courses consisting of straight lines and circles. The predictions of the model were confirmed, suggesting that a general measure for the ease of control of a vehicle (or other controlled system) is possible using this technique.     

The effects of a lower body exoskeleton load carriage assistive device on limits of stability and postural sway

The study investigated the effects of using a lower body prototype exoskeleton (EXO) on static limits of stability and postural sway. Measurements were taken with participants, 10 US Army enlisted men, standing on a force platform. The men were tested with and without the EXO (15 kg) while carrying military loads of 20, 40 and 55 kg. Body lean to the left and right was significantly less and postural sway excursions and maximal range of movement were significantly reduced when the EXO was used. Hurst values indicated that body sway was less random over short-term time intervals and more random over long-term intervals with the EXO than without it. Feedback to the user's balance control mechanisms most likely was changed with the EXO. The reduced sway and relatively small changes in sway with increasing load weights suggest that the EXO structure may have functioned to provide a bracing effect on the body.     

全断面混凝土衬砌钢模台车的应用

羊湖电站引水隧洞总长５８８３ｍ,为φ２．５ｍ的圆形有压隧洞,全线采用钢筋混凝土衬砌。施工区空气稀薄,严重缺氧,气候寒冷。混凝土衬砌采用φ２．５ｍ全断面钢模台车进行,混凝土由洞外拌和系统拌和,有轨运输进洞,混凝土泵送入仓。全断面钢模台车由钢模、台车和外部支撑三部份组成,钢模的构成方式为“三铰两缝式”。本文介绍了羊湖水站引水隧洞混凝土衬砌中应用φ２．５ｍ全断面钢模台车的使用情况和施工方法。     

基于红外热成像技术的车厢内部火灾预警研究

红外热成像技术是目前最为实用的火灾预警检测手段之一,可以有效提高列车车厢的运行安全。基于红外热像仪的原理及优点,结合动车组车厢较为狭长的特点,探讨红外探测器的镜头选择;提出了融合绝对温度和基于高度变化的火焰判定概率模型,提高了火焰检测的精度。在动车车组车厢环境中的测试验证了方法的有效性和稳定性,降低虚警。     

A Novel Parsimonious Neurofuzzy Model Applied to Railway Carriage System Identification and Fault Diagnosis

ＡＮｏｖｅｌＰａｒｓｉｍｏｎｉｏｕｓＮｅｕｒｏｆｕｚｚｙＭｏｄｅｌＡｐｐｌｉｅｄｔｏＲａｉｌｗａｙＣａｒｉａｇｅＳｙｓｔｅｍＩｄｅｎｔｉｆｉｃａｔｉｏｎａｎｄＦａｕｌｔＤｉａｇｎｏｓｉｓＳ．Ｃ．Ｚｈｏｕ，Ｏ．Ｌ．Ｓｈｕａｉ＋，Ｔ．Ｔ．Ｗｏｎｇ?..     

S7-300 PLC在立式锥形穿孔机顶杆小车电气控制系统中的应用

介绍立式锥形穿孔机顶杆小车电气控制系统中硬件组态、直流传动装置与PLC的通信、软件编程等内容,以及在实际运行中遇到的问题及解决办法。     

模糊控制在布料小车定位系统中的应用

以某球团厂破碎车间的布料过程为背景,针对该厂布料过程中小车定位不准和布料不均匀的问题,提出了基于PLC的模糊控制算法,结合超声波料位计和激光测距仪的反馈信息,有效地解决了该厂布料过程中小车定位不准和布料不均匀的缺点。利用上位机组态画面实现了对布料过程的远程监控,提高了车间的自动化水平,改善了操作人员的工作环境。本系统在运行期间能够准确判断矿仓的物料需求,完成布料小车的精确定位,降低了操作人员的工作强度。     

谈现代汽车车身塑料件及其涂装

本文详细阐述了现代汽车车身塑料件涂装的功用；并介绍了汽车塑料件涂装的常用涂料与配套、塑料件修补涂装前的准备工作；硬、软质塑料部件修补面漆的喷涂；车用聚丙烯塑料件的喷涂及车内乙烯基塑料件和乙烯树脂顶棚表面的喷涂。     

车厢式移动空气监测站的改造及应用

车厢式移动空气监测站是一种将空气自动站改造为车厢形式,通过与皮卡车组装,实现其流动监测的功能,是适应于中小城市运用于大气流动监测的技术。文中介绍了车厢式移动空气监测站的改造细节和应用特点。     

助卷车架互换式双带助卷器设计

为满足大型热轧机生产铝板带材宽度范围大的要求,设计了助卷宽度范围大的车架互换式双带助卷器。本文介绍为某2850mm热连轧机配套设计的车架互换式双带助卷器的工作原理、结构特点和助卷带张力的计算方法。