查询词典 power steering

The basic approach of protecting people from being hurt or killed in an accident is to improve crashworthiness of vehicles. This paper starts with discussing theories and methods for vehicle passive safety design, which included experiential methods, analytic methods, multi-body dynamics methods, crash test methods and the finite element method. Emphasis will be paid to the basic FEM theories and algorithms of impact problems. Topics discussed include the governing equation, element discretization, hourglass control, time integration, material model, shell element algorithms and contact-impact algorithms. For more reliable simulation results, this paper then conducts study on how to accurately get material model parameters by combining the FEM method with experimental method, and develops relevant material test machine and parameter calculating software. Based on that, basic typical impact simulation and test validation study are conducted. On the basis of the above work, the paper studies the thin-shell structures'crashworthiness, which was affected by the following factors: spot-weld features, shell thickness, cross-section and pre-deformation. As to vehicle parts'crashworthiness, the paper conducts simulation study of designing energy-absorbing steering system and adaptive airbag system. A practical energy-absorbing steering wheel is designed as an example. In further depth research, the paper suggests several inverse quantificational methods for vehicle crashworthiness design based on the ideal crash characteristics. The above theories and methods are applied with good results through several practical vehicles' crashworthiness design and improvement.

文中对汽车碰撞安全性的设计理论和方法进行了归类和总结，其中包括经验法、解析法、多刚体动力学法、试验法以及有限元方法等；重点介绍了碰撞有限元法的基本理论和有关算法，涉及到有限元求解控制方程、单元离散、沙漏模态控制、时间积分、材料模型和应力修正、薄壳单元算法以及接触碰撞界面算法等，探讨了有限元计算中的材料模型参数获取技术，开发了相应的材料试验装置及材料模型参数反求软件，在此基础上进行了基本的碰撞仿真算例和试验对比研究；文中通过应用有限元方法研究了薄壁构件的碰撞吸能特性，指出了设计薄壁吸能构件时需要考虑的几个主要影响因素，即焊点、壁厚、横截面和预变形等；在关于车辆部件的碰撞安全性能设计中进行了吸能转向机构和自适应安全气囊的仿真研究，提出了吸能转向机构和自适应安全气囊的仿真研究方法；文中最后探讨了整车碰撞性能的设计与改进方法，提出了以理想碰撞特性为目标，采用分段加速度或者根据碰撞时间进行设计的反推设计法、部件吸能仿真优化设计法等量化设计方法，并通过综合应用文中所讨论的相关技术进行了整车碰撞性能的设计与改进实例研究，所选定的车型是大众化的普通轿车和碰撞安全性基础较差的微型面包车，研究结果表明，本文所提出的设计与改进方法是适用而有效的，具有重要的工程实用意义和价值。

Based on the prior art, the optical engine according to the invention has the improvements that, three optical axis steering components are respectively introduced into red, green and blue light illumination systems, and an optical axis lengthening structure is introduced into the green light illumination system, so that optical axes of the red, green and blue light illumination systems, each of which is from an LED resource to the optical axis steering component, are counterclockwise rotated for 90 degrees, parallel with each other, parallel with an optical axis of a projection lens, arranged in a same plane and positioned under the projection lens, luminous faces of three LED luminous chips of the red, green and blue light illumination systems are in a same plane, and the three LED luminous chips can be mounted on a same heat-radiating plate, therefore, the heat-radiating system has a simplified structure, and the optical engine has reduced size.

在背景技术所述的光学引擎的基础上作以下改进，在红、绿、蓝光照明系统中引入三个光轴转向器件和在绿光照明系统中引入光路加长结构，旨使：红、绿、蓝光照明系统各自的从LED光源至光轴转向器件部分的光轴朝逆时针方向转动90°、互相平行、与投影镜头的光轴平行、居同一平面和位于投影镜头的下方，红、绿、蓝光照明系统的三个LED发光芯片的发光面居同一平面，三个LED发光芯片可安装在同一块散热平板上，散热系统的结构简化，所述的光学引擎的尺寸减小。

Thirdly , in the light of the demands ' that the large - scale photoelectric tracking and sighting equipment now available ask for fsm and the specific demands of the fast - steering mirror , designs a set of shaftless rapid controlling reflector system which impels manufacturing enterprises to bourgeon a suit of new productive processing method which differentiate completely from that of the axiferous fast - steering mirror system

由现有大型光电跟踪、瞄准设备对fsm的要求，结合对快速控制反射镜结构的具体要求，自行设计了一套完全区别于有轴系支承的新的生产加工工艺的柔性轴快速控制反射镜系统。

Main Products: Engine assembly of import and export of water pipes, automotive fuel tube assembly, automotive steering gear, steering ball, rod assembly, brake pipe joints, such as an automobile chassis parts and pieces of steel pipe.

主要产品：发动机进出口水管总成，汽车加油管总成，汽车转向器，转向球头，拉杆总成，制动管路接头等一列汽车底盘零部件以及钢管件。

By using the computing method of this paper, emendation error after yaw-steering can be reduced to centesimal Hz level. Thus, precise computation of yaw-steering is successfully achieved.

利用该文提出的计算方法，采用偏航控制的多普勒中心校正误差可以达到0.01Hz量级，从而实现了偏航控制的精确计算。

Dynamics characteristics of the steering mechanism,according to the confirmed scheme for the drive mechanism andconsidering the working condition for steering of a crawler tractor, areanalyzed so that the base for the structure design of the generaldrawing design, intension and rigidity analysis are established.

依据确定的转向机构方案，结合履带拖拉机的转向工况，进行了转向机构的动力学特性分析，为总图设计的结构设计和强度、刚度分析奠定基础。

Tyre abrasion of double-front-axle steering automobile follows above rule as a result of two factors namely change of adjustable pole's length and deflexion of front and back steering axles.

双前轴转向汽车之所以产生上述的轮胎磨损规律，主要有两个原因，即可调连杆长度变化和前、后转向轴偏斜。

This paper analysed the kinematic properties of ball joint hi nged on the piston rod and steering drag link of a separated assistant steering m echanism, and the equations of the path and mathematical model of pressure angle were established.

文摘：分析了分置式转向助力机构的液压缸活塞杆与转向直拉杆相铰接的球头销的运动特性，建立了其轨迹方程及压力角的数学模型。

Founded in November 2006, registered capital of 500,000, the existing staff of 35 professional production, the current main business is: to the automobile factory·ìmatching leather steering wheel and the newly-developed production and marketing of patented products: Express sealed car steering wheel cover.

公司成立于2006年11月，注册资金50万，现有专业生产人员35人，目前主要业务为：给汽车制造厂配套真皮手缝方向盘和生产销售新开发的专利产品：快速封口汽车方向盘套。

One is for prevention of vehicle "Tripped" rollover, and the other one is for "Untripped" rollover. Fifth, as simulation tests vehicle is subjected to Sinusoidal steering、Step steering、J-Turn and Fish-hook maneuvers.

探讨汽车防侧翻控制的控制流程，基于模糊基本理论，模糊控制的基本特点，以及运用模糊控制原理，分析两种侧翻控制的规则不同，在SIMULINK平台中设计了两种防侧翻控制器，即防绊倒侧翻模糊控制器与防操纵侧翻模糊控制器。

"Bird Man's Diary, Butting on the Love Island", Changsha, China

2008年"鸟人日记，顶在爱情岛"，中国长沙

As long as they were in the service of a family of wizards, their magic would remain dormant.

只要他们一天为家庭服务，他们的法力就潜藏不动。