轻便汽车

Department of Electromechanics, NanChang University, Nan Chang, 330031, ChinaAbstract: In order to control the steering system easily and not lost a sense of the road, A mathematical model of Electric Power Steering System was established through Some power research. Study on Control Strategy for EPS, Fuzzy Control and PD to control the parallel control algorithms was introduced.

为了达到对转向系统控制转向轻便又不失路感的目的，通过对汽车电动助力转向系统进行力学分析，建立数学模型，提出一种模糊控制与PD控制并行的控制算法。

It is proved by test result that with optimized alignment parameter the vehicle has better returnability and handiness .

根据所述理论对某轻型货车前轮定位参数进行了改进设计，试验证明优化后的汽车具有更好的回正性能与轻便性。

Because of the advantages such as the steering sensitivity,handiness, and absorbability of the impulse from the road the power steering system is widely used since 1950's.

由于动力转向系统具有转向操纵灵活、轻便、并可吸收路面对前轮产生的冲击等优点，自20世纪50年代以来在各国汽车上开始普遍应用。

But the two things are as different as an automobile and a one-horse shay.

不过，这两者之间的区别就像汽车与单马轻便马车的区别一样明显。

Electric Power Steering System is a new type power steering system which directly depending on electromotor to supply assistant tortile. It can easily realize to supply different power when the velocity of automobile changed and guarantee the automobile steering handily and agilely in low velocity, running steadily and reliably in high velocity.

电动助力转向系统是一种直接依靠电机提供辅助转矩的动力转向系统，它可以很容易地实现不同车速提供不同助力效果的功能，保证汽车在低速行驶时轻便灵活，高速行驶时稳定可靠，可提高车辆的主动安全性，并有利于环保，因此具有广泛的应用前景。

The present paper analyzes the effect of EPS on steering performance. The new system of evaluation includes steering maneuverability, steering returnability, on-center handling performance, steering hand-wheel vibration, servo motion sensitivity and assist characteristics. Some relevant evaluation indexes are also discussed here.

针对电动助力转向的结构特点，本文分析了电动助力转向对汽车转向性能的影响，提出从转向轻便性、转向回正性、转向盘中间位置区域性能、转向盘振动、随动灵敏度和助力特性等方面进行电动助力转向系统转向性能的客观评价，并探讨了相应的评价指标，对EPS系统的设计以及相关试验标准的确定有一定的指导意义。

Based on the above, the author built the vehicle virtual prototyping simulating model including the front and rear suspensions, the powertrain, the steering system, the front and rear tires, wrote the driver control files(abbreviation. dcf) and driver control data files(abbreviation. dcd) for vehicle handling stability simulation analyzing according to the requirements of the current standards GB/T6323.1-94-GB/T6323.6-94 of our nation"s for vehicle controllability and stability test, carried out simulation and analyses for vehicle handling stability such as steering wheel angle step input test, returnability test, steady static circular test, pylon course slalom test and steering efforts test, and evaluated the car"s handling stability performance by scoring according to GB/T 13047-91 ?Criterion thresholds and evaluation of controllability and stability for automobiles?.

在上述基础上建立了包括前后悬架、发动机、转向系、前后轮胎等在内的整车虚拟样机仿真模型，并根据我国现行整车操纵稳定性试验标准GB/T6323.1-94～GB/T6323.6-94的要求，编写了用于整车操纵稳定性仿真分析的驱动控制文件(Driver Control Files，缩写为DCF)和驱动控制数据文件(Driver Control Data Files，缩写为DCD)，进行了转向盘转角阶跃输入试验、转向回正试验、稳态回转试验、蛇行试验和转向轻便性试验等整车操纵稳定性试验仿真分析，并参照GB/T13047-91《汽车操纵稳定性指标限值与评价方法》对该轿车的操纵稳定性进行了评价计分。

His own children had grown up, and married, and four times he had seen before him on the tracks the ghastly dot of tragedy converging like a cannon ball to its eclipse of horror at the boiler head—a light spring wagon filled with children, with its clustered row of small stunned faces; a cheap automobile stalled up the tracks, set with the wooden figures of people paralyzed with fear; a battered hobo walking by the rail, too deaf and old to hear the whistle's warning; and a form flung pas his window with a scream—all this he had seen and known.

他曾4万次在他面前的铁轨上看到了可怕的悲剧所凝聚的小点，象颗炮弹似的射向火车头前的恐怖的阴影－－－1辆满载小孩子的轻便马车和密密一排惊惶失措的小脸，一辆廉价汽车停在铁轨上，里面坐着吓得目瞪口呆状若木鸡的人们，一个带着惊呼的人影掠过他的窗口－－－所有这些，司机都历历在目，记忆犹新。

His own children had grown up, and married, and four times he had seen before him on the tracks the ghastly dot of tragedy converging like a cannon ball to its eclipse of horror at the boiler head—a light spring wagon filled with children, with its clustered row of small stunned faces; a cheap automobile stalled up the tracks, set with the wooden figures of people paralyzed with fear; a battered hobo walking by the rail, too deaf and old to hear the whistle's warning; and a form flung pas his window with a scream—all this he had seen and known.

当初她有一个小孩缠着她的裙子，现在这孩子已长成大姑娘，也每天和她母亲一起出来挥手致意。司机多年操劳，已经白发苍苍，渐渐变老了。他驾驶长长的列车栽着旅客横贯大地已上万次。他自己的子女都已长大了，结婚了。他曾4万次在他面前的铁轨上看到了可怕的悲剧所凝聚的小点，象颗炮弹似的射向火车头前的恐怖的阴影－－－1辆满载小孩子的轻便马车和密密一排惊惶失措的小脸，一辆廉价汽车停在铁轨上，里面坐着吓得目瞪口呆状若木鸡的人们，一个带着惊呼的人影掠过他的窗口－－－所有这些，司机都历历在目，记忆犹新。

Is is more than 1/3 lighter than the iron sheet spectacle case,especially in transportation,such as posting,plan,vessel,truck etc.The freight charges are relatively low,and there are little broken rate on the transport.

该产品是利用 ABS 塑胶原料，外皮包革，做工精细，既环保又轻便，该产品比铁皮眼镜盒轻三分之一以上，特别是在运输当中，如：邮寄、飞机、轮船、汽车等。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。