一种新型的深海钴结壳作业车行驶性能仿真研究

钴结壳作业行走车作为深海钴结壳采集系统的工作平台行走在海山上进行作业。本文提出了一种新型的钴结壳作业车结构。基于大型机械系统动力学仿真软件（ADAMS／ATv）,构建了典型海山地形和新型作业行走车的虚拟样机模型,通过四种典型工况的仿真分析,对作业车的行走性能作出了预测。     

四轮独立转向汽车高速时操纵稳定性的研究

讨论四轮独立转向底盘转向时前后轮迅速、连续响应问题，建立相应的数学模型，并采用比例控制法简化分析过程，提出控制策略。     

Organizational arrangements for MIS units

Decisions on organizational arrangements for MIS units comprise location in the organization, rank of responsible executive, organization of MIS implementators, degree of centralization, the user interface, the study group, the steering committee, the data base administrator, the corporate computer staff, and external assistance. Based on a wide-ranging survey of papers in the field of MIS, the authors have formulated guidelines which derive from the impact of organizational decisions on the success or failure or MIS and MIS projects.     

The sensitivity analysis of yaw rate for a front wheel steering vehicle: In the frequency domain

In this paper, the sensitivity analysis of yaw rate for a front wheel steering vehicle is performed in the frequency domain. A two degree of freedom system is used to represent a simple vehicle model in order to derive the system transfer function. The transfer function is defined between a steering angle input and a yaw rate output. This model shows the simplest lateral dynamic effect and is useful for understanding of the dynamic characteristics and control aspect of the target system. Vehicle mass, inertia, cornering stiffiness, and wheel base are selected as design variables. Sensitivity functions of the transfer function with repect to design variables are derived, and the results show that the response of the yaw rate always has stable minimum phase characteristics. The objective of this paper is the proposition of a base for re-design and new-design of the vehicle by checking the yaw rate variations with respect to the design variable change in the frequency domain. Finally, dominant design variables can be selected based on the sensitivity analysis.     

Improvement of the steering feel of an electric power steering system by torque map modification

This paper discusses a de motor equipped electric power steering (EPS) system and demonstrates its advantages over a typical hydraulic power steering (HPS) system The tire-road interaction torque at the steering tires is calculated using the 2 d o f bicycle model, in other words by using a single-track model, which was verified with the J-turn test of a real vehicle Because the detail parameters of a steering system are not easily acquired, a simple system is modeled here In previous EPS systems, the assisting torque for the measured driving torque is developed as a boost curve similar to that of the HPS system To improve steering stiffness and return-ability of the steering system, a third-order polynomial as a torque map is introduced and modified within the preferred driving torques researched by Bertollini Using the torque map modification sufficiently improves the EPS system     

工程机械新型全液压转向系统

本文给出一种工程机械新型全液压转向系统，能实验运输行驶，小回转半径，斜行等多种工况。     

转向泵微机测试控制系统

介绍一种基于ＰＣ机＋ＰＬＣ可编程控制器下位机的转向泵微机测试控制系统。ＰＬＣ下位机完成转向泵的压力冲击自动控制、油温自动控制、出厂试验自动控制和压力、流量、温度、转速、转矩等参数的自动测试。ＰＣ机可随时在屏幕上显示已采集到的数据,并打印数据表格和曲线     

多轴线转向车辆转向机构的优化设计与试验研究

多轴线转向车辆转向机构是车辆实现转向功能的核心部件,根据某矿用车对转向机构的工作要求,设计和建立了多轴线转向车辆转向机构的仿真模型,并对转向机构进行了优化,同时对液压系统进行建模,通过分析软件对液压系统的特性进行仿真分析,通过试验测试,证明所设计转向杆系及液压系统的响应特性与仿真结果吻合,达到了预期效果。     

装载机转向油缸型式试验液压系统

根据装载机生产厂家提出的转向油缸型式试验要求,设计了油缸型式试验液压系统。在耐久性试验中,该液压系统采用了节能型双作用加载方式。实际应用结果表明:所设计的型式试验液压系统总体性能满足设计要求,节能效果明显。     

压铸镁合金在汽车方向盘上的应用研究

通过对SC6380客车方向盘生产所用镁合金系的选择、方向盘服役模型建立、弹性有限元分析、结构再设计、压铸工艺虚拟设计及数值模拟等步骤，初步探索了镁合金方向盘的开发过程，为倡导镁合金等新材料在方向盘上的合理应用提供了技术支撑平台，通过以上步骤能有效的缩短产品开发周期。