Influence of Liquid Load Shift on the Dynamic Response of Articulated Tank Vehicles

The influence of the lateral load shift on the dynamic response characteristics of an articulated tank vehicle is investigated assuming inviscid fluid flow conditions. A quasi-dynamic roll plane model of a partially filled cleanbore tank of circular cross-section is developed and integrated to a three-dimensional model of the articulated vehicle, assuming constant forward speed. The destabilizing effects of liquid load shift are studied by comparing the directional dynamics of the partially filled tank vehicle to that of an equivalent rigid cargo vehicle subject to steady steer input. Dynamic response characteristics demonstrate that the stability of a partially filled tank vehicle is adversely affected by the Liquid load shift The distribution of cornering forces caused by the liquid load shift yield considerable deviation of the path followed by the liquid tank vehicle. The influence of the vehicle speed on the dynamics of the liquid tank vehicle is also investigated for variations in the fill levels and fluid density.     

Steady State Steering Response

The yaw rate response for a two-degree-of-freedom car model requires a family of curves for different degrees of oversteer or understeer. By use of non-dimensional co-ordinates this family is reduced to one single curve. The ordinate ρ is the ratio of yaw rate response to that of a neutral steering car at the same speed and is less than 1 for understeer and greater than 1 for oversteer. Since ρ is also the ratio of the side-slip angle response it is hence, a unique measure of the steady-state steering characteristics.     

An Approach to Determining Worst Case Platoon Behavior

This paper presents a method with which one can evaluate alternative platooning control strategies with respect to worst case behavior. The motivation is to provide platoon control designers with an objective means of evaluating robustness in the face of system uncertainties. The approach can be viewed as an extension of optimal control procedures and is applicable to complex, nonlinear systems. An arbitrary number of uncertain parameters, unmodeled components and inputs are allowed. The end result is a lower bound for the worst case platoon performance.     

大功率逆变器的实时控制器研究

介绍了１０００ｋＷ油冷变流器地面试验系统中变器器实时控制器的硬件结构和软件功能。试验结果表明，采用该实时顺较好地解决了电机平滑起动、软件合成频率、ＳＰＷＭ实时计算以及移缺口制造问题。该装置目前已应用于我国研制的４０００ＫＷ交流传动电力机车上。     

Application of Elementary Neural Networks and Preview Sensors for Representing Driver Steering Control Behaviour

This paper demonstrates the use of elementary neural networks for modelling and representing driver steering behaviour in path regulation control tasks. Areas of application include uses by vehicle simulation experts who need to model and represent specific instances of driver steering control behaviour, potential on-board vehicle technologies aimed at representing and tracking driver steering control behaviour over time, and use by human factors specialists interested in representing or classifying specific families of driver steering behaviour. Example applications are shown for data obtained from a driver/vehicle numerical simulation, a basic driving simulator, and an experimental on-road test vehicle equipped with a camera and sensor processing system.     

上盖物业综合开发的公交站场公交功能评估

为缓解公交站场建设资金短缺、提高公交站场土地集约化利用,许多城市积极探索公交站场上盖物业综合开发j为合理确定上盖物业综合开发后的公交站场公交功能规模要求,确保上盖物业综合开发不影响公交站场应有的公交功能,首先阐述公交功能评估的必要性,然后提出公交站场背景客流需求规模和诱增客流需求规模的确定方法,从公交站场适应性、公交站场交通运营组织、周边路网承载力三个方面提出公交站场上盖物业开发公交功能评估方法。并提出相关建议,结合案例分析为公交站场上盖物业综合开发如何确保公交站场的公交功能提供了可行的方法和思路。     

以“诚信”为核心 打造山东船员品牌

通过分析山东船员品牌建设的背景和山东省船员队伍存在的主要问题,提出了山东船员品牌的内涵和打造以诚信为核心的山东船员品牌的重要举措。     

基于交通流荷载的高速公路沥青路面使用寿命分析

为探求交通流荷载下高速公路沥青路面的使用寿命,采用层状体系理论,建立ANSYS 3-D有限元粘弹性路面结构模型;根据损伤力学理论研究单轴载通过时由沥青层底部的最大拉伸应变造成的路面破坏;再由Miner's线性累积损伤理论得到在实际车流荷载作用下沥青路面发生一定破坏程度时的使用寿命.计算结果表明,研究路段的沥青破坏路面等...     

国产环氧沥青混凝土钢桥面铺装施工适用性研究

为提高国产环氧沥青混凝土在钢桥面铺装中的施工质量,本文对其施工性能进行研究。通过室内沥青混合料马歇尔试验及沥青粘度试验,对国产环氧沥青混凝土与美国环氧沥青混凝土的常温养护、模拟夏季养护马歇尔稳定度及沥青粘度等性能进行比较,提出了国产环氧沥青混凝土钢桥面铺装施工季节、养护时间等方面的建议。     

带式输送机节能技术分析

研究了带式输送机的节能技术,详细分析了带式输送机减电机运行、流程优化、全变频恒力矩调速等各种节能技术的原理、适用范围及优缺点,为带式输送机的节能改造提供理论依据。