取货看板在船厂车间的应用研究

看板管理是准时生产的一个重要工具,而取货看板是其主要内容之一,因此,着重研究了取货看板,列举了取货看板在船厂车间的应用例子,提出了推行取货看板的方法和要求,从而使造船达到准时生产,提高经济效益.     

大型邮轮安全管理系统设计

为满足安全返港理念下安全管理系统的设计要求,以安全管理系统设计过程中适用的法规及相关设计要求为基础,分析所有与邮轮安全相关联的接入业务,结合安全管理系统处理流程,提出安全管理系统架构设计方案.设计冗余的配电及通信网络方案,并分析安全返港场景下设计方案潜在的损失情况.     

大型组合式挡泥板固定支架多方案的模拟研究

建立大型组合式挡泥板固定支架系统动力学仿真模型,对其进行三种工况下的动力学仿真分析,计算出各固定点所受载荷,并将其输入到挡泥板固定支架有限元模型进行模态、强度、刚度分析。通过多方案对比分析,并结合工程应用经验,确定正式方案。     

矩阵项目型管理在整车研发过程中的解析及优化

汽车行业的竞争日益激烈,新车型层出不穷,如何高效地推动新车型的研发进度,成为现今汽车研发机构思考的一大难题。通过对汽车整车新产品研发项目管理现状的调研,发现主要有3种管理模式,文章结合整车项目管理的理论与实践,阐明某一车型研发的一种管理模式——矩阵型,并对其优点和缺点进行了阐述,同时针对矩阵型管理模式不足之处进行成因分析,提出针对性的解决措施。     

浅析建设项目供应商的选择及存在问题

在建设项目管理的全过程中,供应商的考察和选择是非常关键的环节之一。供应商的选择直接影响到项目的质量、成本和进度。目前项目的业主及从事项目管理的单位对项目供应商的选择都有一定的重视,而且制定了相关供应商考察和评价的工作流程。该文主要分析了建设领域对供应商选择的几种方法并对其中存在的不足提出了自己的看法。     

Stability enhancement and fuel economy of the 4-wheel-drive hybrid electric vehicles by optimal tyre force distribution

In this paper, vehicle stability control and fuel economy for a 4-wheel-drive hybrid vehicle are investigated. The integrated controller is designed within three layers. The first layer determines the total yaw moment and total lateral force made by using an optimal controller method to follow the desired dynamic behaviour of a vehicle. The second layer determines optimum tyre force distribution in order to optimise tyre usage and find out how the tyres should share longitudinal and lateral forces to achieve a target vehicle response under the assumption that all four wheels can be independently steered, driven, and braked. In the third layer, the active steering, wheel slip, and electrical motor torque controllers are designed. In the front axle, internal combustion engine (ICE) is coupled to an electric motor (EM). The control strategy has to determine the power distribution between ICE and EM to minimise fuel consumption and allowing the vehicle to be charge sustaining. Finally, simulations performed in MATLAB/SIMULINK environment show that the proposed structure could enhance the vehicle stability and fuel economy in different manoeuvres.     

An investigation of the effects of pneumatic actuator design on slip control for heavy vehicles

Progress in reducing actuator delays in pneumatic brake systems is opening the door for advanced anti-lock braking algorithms to be used on heavy goods vehicles. However, little has been published on slip controllers for air-braked heavy vehicles, or the effects of slow pneumatic actuation on their design and performance. This paper introduces a sliding mode slip controller for air-braked heavy vehicles. The effects of pneumatic actuator delays and flow rates on stopping performance and air (energy) consumption are presented through vehicle simulations. Finally, the simulations are validated with experiments using a hardware-in-the-loop rig. It is shown that for each wheel, pneumatic valves with delays smaller than 3 ms and orifice diameters around 8 mm provide the best performance.     

海拉尔～满洲里一级公路总体设计

海拉尔～满洲里一级公路是交通运输部第二批示范项目,是内蒙古自治区第一个公路示范工程。因其地处草原地区,故被称为"草原示范第一路"。通过海满公路总体设计,介绍新理念在该项目各个环节中的应用情况,对今后草原公路的设计工作起到积极的参考借鉴作用。     

转向盘多功能按键常见失效模式分析及验证方法

介绍目前国内外常见汽车转向盘多功能按键的外观结构及特点,分析产品常见的几种失效模式,总结汽车转向盘多功能按键在验证时应该关注的几个问题。     

内装式电压调节器结构原理及常见故障分析

详细介绍单功能内装式汽车发电机电压调节器的结构、工作原理以及发生故障的原因和预防措施。