简易陀螺仪惯性制导系统设计

在设计陀螺仪的过程中,需要注意陀螺仪应用于飞机控制飞行惯性制导系统时需要搭建传感器、单片机、晶体放大驱动三大模块。随后需要综合积分算法,从而保证陀螺仪可以自行调整飞机航线,而这项技术一般应用于自动驾驶系统中,飞行员在飞机飞行的过程中使用自动驾驶技术就能够极大的降低工作量,从而提升飞行质量。本文主要针对于简易陀螺仪在制作的过程中惯性制导系统的设计进行分析,并且对于未来的简易陀螺仪惯性制导系统设计方案进行了阐述。     

车用电制动器(EMB)样机设计

基于盘式制动器，采用电机作为动力源，进行了线控制动系统最关键部件电制动器（EMB）的设计、试制和性能测试。阐述了EMB中各主要部件参数设计与选型方法，以及关键零部件的结构设计。针对样机进行的动态测试表明，所提出的设计集成方法是可行的，与液压制动系统相比有优良的可控性，为后续的改进设计奠定了良好基础。     

轻量化技术在机床设计中的应用

在机床设计发展的过程中,设计人员选择的设计理念较为传统,工作人员会对影响机床工作过程中的各种因素,如压力、材料硬度以及刚度等进行简单的分析后展开机床设计,虽然这种设计方式的效率较快,但是较为刻板,会让设计过程中的成本增加,给企业带来较大的经济负担。同时,机床设计过程中十分重要的一个环节就是机床的精度问题,如果运用传统设计方式,那么就只能借助原材料将机床结构进行加厚,然后实现机床精度的提升,这就会导致机床变得更加臃肿厚重,毕竟很大一部分的结构都是无用的,功能模块较少。因此,本文将对于如何在机床设计中应用轻量化技术进行分析、探究,希望能够为相关工作人员提供思路,推动我国机床设计水平的整体提高,为国家经济发展贡献一份力量。     

湿陷性黄土隧道动态设计

动态设计可弥补由于隧道地质条件的隐蔽性和复杂性等致使初始设计方案不能很好地切合实际的缺陷。应用系统论的思想,采用动态控制系统反馈机制的方法,提出了动态设计方法及隧道动态设计的具体流程,并以大酉山隧道为例,针对重湿陷性黄土隧道的特殊地质状况,分析了隧道施工中根据实测信息、支护状况及时调整设计方案的过程,为其他类似工程提供借鉴和参考。     

Symbolic-numerical Solution of Multibody Systems with Closed Loops

For multibody systems with closed kinematic Loops a set of ordinary differential equations and decoupled algebraic equations is formulated which can be solved with explicit multistep integration algorithms. This is achieved by introducing a minimal set of generalized coordinates being specified during numerical integration. For avoiding restart of the integration algorithm after changing these variables transformation relationships are given. Velocity and acceleration constraints are satisfied exactly, position constraints are fulfilled approximately by a dynamic invariant projection onto the constraint manifold. The method is demonstrated by an application to a five-point wheel suspension.     

Design Optimization of a Rear Independent Suspension for the Korean Light Tactical Vehicle

Steering and suspension handle the direction of a vehicle according to the driver’s intentions and control the disturbance from the road surface while supporting the vehicle body. The static and dynamic characteristics of two systems are critical factors for the ride comfort and the directional stability. In the layout stage, the hard points of steering and suspension systems are determined. In the next design stage, the detailed design of the system, including gearboxes, springs, shock absorbers, and control links, is carried out. While the optimal hard points of a suspension are determined at the precedent design, interference with other peripheral components should be carefully examined in the detailed design process. In the case of the design point change should be made to avoid the interference, subsequent position and shape changes of the link mechanism are required. Therefore, there is a need to examine the optimization of suspension compliance characteristics with chassis design changes and the durability performance of the modified design. This study proposes an integrated analysis method for the design optimization and the durability evaluation of such optimized design specifications of the rear independent suspension for a military vehicle.     

Human-Centered Design of an Acc-With-Braking and Forward-Crash-Warning System

This paper addresses the development of driver assistance systems whose functional purposes are to provide both adaptive cruise control (ACC) and forward collision warning (FCW). The purpose of the paper is to combine concepts from human factors psychology, vehicle-dynamics, and control theory, thereby contributing to the body of knowledge and understanding concerning human-centered approaches for designing and evaluating driver assistance systems. Conceptual and experimental results pertaining to driving manually and with the assistance of ACC and FCW are presented. The following human-centered aspects of driver-assistance systems are analyzed and presented: the looming effect; including rule-based and skill-based behavior in the design of ACC systems; using desired dynamics in controlling the driving process; braking rules that trade headway range for deceleration level; and collision-warning rules based on two different stress indicators. Field-test data are examined to justify and verify the parametric values selected for use in human-centered ACC systems. Measured data from on-road driving are used to evaluate the performance of proposed FCW systems in braking situations. The paper concludes with observations concerning the difficulty of developing a clear understanding of when and why drivers brake.     

自行车专用路设计要点分析

根据中国境内外自行车专用路建设情况，分析了道路建设功能特点；同时结合自行车出行特点，分析了自行车专用路设计要点。通过分析认为，自行车专用路在设计过程中应重点考虑道路建设的功能定位、设计标准、线形指标、接驳换乘、人性化设施及配套景观等6方面内容，以便为自行车出行提供“连续、便捷、舒适、快速”的通行空间。     

Human-Centered Design of an Acc-With-Braking and Forward-Crash-Warning System

This paper addresses the development of driver assistance systems whose functional purposes are to provide both adaptive cruise control (ACC) and forward collision warning (FCW). The purpose of the paper is to combine concepts from human factors psychology, vehicle-dynamics, and control theory, thereby contributing to the body of knowledge and understanding concerning human-centered approaches for designing and evaluating driver assistance systems. Conceptual and experimental results pertaining to driving manually and with the assistance of ACC and FCW are presented. The following human-centered aspects of driver-assistance systems are analyzed and presented: the looming effect; including rule-based and skill-based behavior in the design of ACC systems; using desired dynamics in controlling the driving process; braking rules that trade headway range for deceleration level; and collision-warning rules based on two different stress indicators. Field-test data are examined to justify and verify the parametric values selected for use in human-centered ACC systems. Measured data from on-road driving are used to evaluate the performance of proposed FCW systems in braking situations. The paper concludes with observations concerning the difficulty of developing a clear understanding of when and why drivers brake.     

Symbolic-numerical Solution of Multibody Systems with Closed Loops

SUMMARY

For multibody systems with closed kinematic Loops a set of ordinary differential equations and decoupled algebraic equations is formulated which can be solved with explicit multistep integration algorithms. This is achieved by introducing a minimal set of generalized coordinates being specified during numerical integration. For avoiding restart of the integration algorithm after changing these variables transformation relationships are given. Velocity and acceleration constraints are satisfied exactly, position constraints are fulfilled approximately by a dynamic invariant projection onto the constraint manifold. The method is demonstrated by an application to a five-point wheel suspension.     

综合管廊的区间设计

为进一步完善城市地下综合管廊工程设计理论，提高综合管廊工程设计的科学性与合理性，基于大量综合管廊工程设计实践，提出将“区间”概念应用于综合管廊工程的总体设计。通过对综合管廊功能需求和入廊管线技术要求的分析，给出综合管廊各类“功能区间”的定义、特征； 通过进一步分析综合管廊各类功能区间的相互关系和重要性，提出通过功能区间构建具备复合功能属性、可复制的“单元区间”，再通过单元区间的复制串联实现综合管廊总体设计的系统布置方法。最后，提出以“单元区间”为核心理念的综合管廊“区间设计”的定义和一般方法，以期为综合管廊工程系统布置提供一种新的设计思路。     

基于MDA的城市公交地理信息系统设计

针对传统城市公交信息系统复杂难于管理,应用MDA模型驱动方法和UML可视化建模语言设计城市公交地理信息系统,以Rational Rose 2003为主要工具设计了城市公交地理信息系统的系统模型、逻辑结构和功能结构,并成功应用于佛山公交项目的实际开发中,实现了对城市公交的管理与辅助规划。     

HMES在集成式汽车线束总装设计应用

随着汽车技术的快速发展,汽车的舒适性、安全性、智能化程度不断提升,导致车载功能电器不断增多,为提高车载各功能电器的可靠性,连接各功能电器的汽车线束多采用集成式设计,将发动机线束、机舱线束、仪表线束、车身线束及其它功能线束集合设计成一条线束;直接导致集成式线束的导线数量、单根导线长度大幅增加,线束的可制造性大幅降低,装配过程控制也愈加困难。为解决集成式线束生产制造及过程控制的难点和问题,我公司在现有HMES系统的基础上,设计和开发了适合集成式大型汽车线束流水线装配管理模块。本文将以HMES装配模块的开发设计和应用方案,与各位共同探讨和交流。     

Analysis of a large injection-molded body using knowledge-based flow process technology

A knowledge-based flow process is presented for large injection-molded body technology (LIMBT). Injection molding of a large body is a difficult technique because of the many factors and their interactions during the molding process. The proposed flow process can support LIMBT through integration of CAE(Computer-Aided Engineering), CAI (Computer-Aided Inspection), and monitoring systems. CAE and DOE (Design of Experiment) are used to construct an optimal mold design in terms of gates and runners and to identify working conditions for the molding process. CAI and monitoring systems with temperature sensors and pressure sensors can be used to inspect the physical molding process and the molded parts. The flow process of a large body is systematically planned and constructed using a knowledge-based flow process with DOE and computer-aided technologies. The proposed flow process is implemented for the molding process of an automobile front bumper fascia.     

综合交通枢纽智慧停车场一体化设计关键技术研究

综合交通枢纽智慧停车场的建设可以实现枢纽客流的快速疏散,提高枢纽运行效率,降低管控压力。目前交通枢纽停车场的建设更注重停车场自身运营管理中智慧系统的建设,但对旅客停车出行链缺乏一体化融合,对周边交通缺乏一体化协同,并出现多主体管理缺乏信息交互的情况。结合智慧停车场功能需求,研究实现功能需求的关键技术,希望为综合交通枢纽智慧停车场建设提供经验借鉴与思考。     

赛车轮毂多功能集成化设计新方法

由于传统制造工艺在复杂曲面和集成化加工的局限性,导致方程式赛车轮毂的多功能集成化一直被制约,以至于传统赛车轮毂总成普遍存在体积硕大、重量大、传动效率低等问题。文章基于集成化设计原则,在保留传统赛车轮毂总成所需功能的前提下,改变赛车外球笼、轮毂、轮辐等的结构以进行集成化设计从而得到多功能集成化赛车轮毂。所获得的集成化赛车轮毂体积重量明显减小且传动效率明显提高,达到了通过集成化以实现轻量化的目标。     

基于稳静化理念的滨江片区道路交通方案设计

区域整体开发是城市建设和城市更新的崭新模式.道路交通作为区域重要基础设施配套,在满足车行基本功能需求的同时,还需结合城市片区功能定位建立起人、车、环境相适应和融合的高品质公共活动空间.以三林滨江南片区三林湾小镇片区道路交通项目方案设计为例,从功能导向出发,构建安宁宜人的稳静化交通出行环境,实现慢行优先、静谧舒适、快慢分离的交通目标.依据设计理念对不同功能道路系统进行了设计研究比选,内容可供高品质城镇区域整体开发基础设施建设工程参考.     

Development of evolutionary cone type LSD for SUV/RV utilizing the axiomatic approach and the ultrasonic nano crystal surface modification technology

Surface topology, cone angle and the forces acting on the cone of the clutch type limited slip differential (LSD) are major design parameters for the bias ratio and the noise condition. Therefore much research has been dedicated to these developments but the results have been used to submit patents. A new cone type limited slip differential for sport utility vehicles and recreational vehicles, which has a very simple structure and easy compliance with the vehicle performance, has been developed by the axiomatic approach and the ultrasonic nano crystal surface modification (UNSM) technology. The design criteria and optimal value of the design parameters are determined by the axiomatic approach utilizing CAE tools. Test methodologies in a test rig and in a vehicle were also developed. Test results showed good performance of bias ratio and noise level but durability is still under testing. This study is an extension of F2006P266, FISITA 2006.     

路基排水一体化设计方法研究及程序开发

路基在公路运营期的稳定状况,常与排水设施是否有效息息相关,路基排水设计是公路工程设计中非常重要的内容。针对目前路基路面排水设计成果普遍不精细的问题,进行路基排水一体化方法研究及程序开发,构建路基三维数字模型,进行专业方案设计、绘制图表,在方案设计中实时进行水力验算,实现路基排水设计全过程的一体化整合,提高路基排水设计工作效率和精度。     

A Modular Computer Model for the Design of Vehicle Dynamics Control Systems1

SUMMARY

This paper describes a multiport approach to computer-aided modeling of vehicle dynamics. The modeling approach produces models that are suitable for the interactive design and evaluation of complex control strategies. The vehicle model which can be used for ride and handling analysis, is built from modular components. The components are programmed using the syntax of the computer aided control system design (CACSD) program EASYS. Seven modeling components are used to create a three-dimensional vehicle dvnamics model. The model is flexible enoug-h to simulate any suspension design with revolute joints.

Each component of the model consists of a FORTRAN subroutine and a main calling module called a macro. To simplify the process of model building, the modeling components in the car model are designed to represent physical elements, such as the spring, damper, link or tire. To create a model, the components, which are represented by blocks, are interconnected through points, located on the blocks, called pons. These ports have been designed to simulate the location of the connection points between the physical elements, as observed in real systems. The construction of multibody models within a CACSD program offers the flexibility of simultaneous interactive simulation of the three-dimensional dvnamics and evaluation of the desien of the controls.

Although modeling of multibody systems using FORTRAN components has been pioneered by Chace, Haug and Orlandea; and bond graph modeling of multibody systems has been investigated by Bos, this approach is novel because:-

The model is included in the control system design program (EASYS). This arrangement allows the designer to exploit the advanced control design tools available in the program. Furthermore, this approach significantly reduces the computation time required for running the model after parameters modification.

The model is built from components that are interconnected by ports which represent the actual physical location of the connection points between the elements. The multiport approach simplifies the model building process for multibody systems. This simplification is achieved by reducing the model of a multibody system to a block diagram form.