查询词典 armored vehicle

ABSTRACT Aiming at problems of trans-vector controller in a vehicle-carried induction motor such as variable rotor and stator resistance following motor temperature, and their inductance varying with flux saturation degrees. Firstly, CSI and VSI are introduced, for CSI, it can hold the advantages both FOC and DTC using stator flux directional, PI parameter and simulation are also introduced. Secondly, equations of IM in the synchronous rotary frame and its static counterpart, as figuring in the saturation condition of magnetic field, are dealt in this paper and the simulation results are presented. Thereafter, the parameter designing of PI trans-vector controller is processed, which features the non-linear model. In practical realization, as neglecting the dynamical change of motor inductance, this paper employs online modification of inductance parameters, according to the flux saturation, then transforms the non-linear equations into linear ones, and so compacts the structure of controller. Thirdly, in view of the maximum torque output is extraordinary requisite when Electrical Vehicle start up, accelerate, and overtake, this paper issues the maximum torque when both inverter and battery capacity is corporeally definite. Fourthly, on-line differentiating and analyzing both rotor's time constants and its flux by using the expanding order reduction and discrete Kalman filter equation are fathomed, in order to realize high-performance trans-vector algorithm, and also the simulation results are presented. Fifthly, the close-loop regenerative brake system, when the EV's torque is set constant, is deduced; at the same time, unification of electric drive model and brake model is executed. Combined with maximum charge current demands, the mathematical model for online yielding torque as a demand.

本论文针对车载异步电机在矢量控制器所遇到的问题：定转子电阻随温度变化及随电机饱和程度变化的转子电感及定子电感而影响电机调速性能提出一套完整的解决方案：分析了电流型逆变器和电压型逆变器在实现矢量控制时控制器参数的计算，分析出对于电流型逆变器在采用定子磁场定向时，其性能同时具有矢量控制和直接转矩控制两者的优势，并对电压型逆变器在转子磁场定向下的模型进行了仿真研究；建立异步电机非线性模型，推导出考虑磁饱和时异步电机在同步旋转坐标系及静止坐标系下的方程，并做出了仿真结果，建立异步电机在非线性模型下的矢量控制调节器的PI参数设计，在实际应用中，若忽略电机电感的动态变化，可以根据当前的磁路饱和状态而在线修正电感参数，从而将非线性方程线性化，降低控制器的复杂度；考虑到电动汽车在起动和加速超车时需要电机有最大转矩输出，本文讨论在逆变器容量一定和电池供电能力有限的情况下电机最大转矩输出问题；推导了异步电机扩展降阶、离散卡尔曼滤波方程在线辨识转子时间常数和转子磁通，用于实现高性能的矢量控制算法，并给出了仿真结果；推导出了电动汽车恒转矩给定的闭环回馈制动系统，实现了电动控制模型和制动模型的统一，而且结合铅酸电池最大充电电流的要求，为制动转矩在线给定建立了数学模型；设计了基于双DSP系统的高性能矢量控制器软硬件框图，并以大量实验数据说明矢量控制在电动汽车应用的实际应用状况。

In electromagnetic compatibilitytesting of vehicle communication system, intermodulation interference between vehicle radio stations is a very important content.

在车载通信系统电磁兼容测试中，车载电台间的互调干扰测试是很重要的内容。

With maturing of CNG vehicle technology and perfection of networked construction of gas fueling station,the opportunity to realize interurban regionalization running of CNG vehicle s already has arrived.

目前我国 CNG汽车仅仅局限于城市中的车辆，随着天然气汽车技术的成熟和加气站网络化建设的完善，实现天然气汽车城市间的区域化运行的时机已经到来。

If there is vehicle traffic or clear markings of a place to cross, this is a traffic misdemeanor subject to fine, and may be contributory negligence in the event of injury to the jaywalker by a vehicle.

Jaywalker，则是乱穿马路的人。出门走路一定要走人行道，过马路的时候一定要走人行横道。走路不遵守交通规则，不但违法而且非常危险。

20 On a road that has no central divider or central line, the motorized vehicle that has a vehicle coming in the opposite direction should reduce speed, drive on the right side of the road and keep a safe distance with other vehicles and pedestrians.

1.2.2.20 在没有中心隔离设施或者没有中心线的道路上，机动车遇相对方向来车时应当减速靠右行驶，并与其他车辆、行人保持必要的安全距离。

The first is a partially reusable two-stage-to-orbit launcher the second is a fully reusable TSTO vehicle with vertical take-off and horizontal landing for the second stage and the third is a fully reusable aircraft-like single-stage-to-orbit vehicle with horizontal take-off and landing.

首为部分可复用二级环绕( TSTO： Two-Stage-To-Orbit )发动机；次为二级带垂发平降的全复用 TSTO；第三种为类似战机的水平起降全复用的单级环绕发动机。

The passing vehicle accelerates during the maneuver and its average speed during occupancy of the left lane is 10 mph higher that of the overtaken vehicle.

通过的车加速在回旋期间，并且它的在左车道的居住的期间平均速度10英里/小时更高那被追上的车。

2 Are applicable to vehicle lessee, 2 to 5 are applicable to vehicle

第1 及2 项适用於租司机，第2 至5 项适用於主

One of its succesful applications is magnetic levitation vehicle—a brand-new type of vehicle on the land.

磁浮技术作为20世纪的一项新兴技术，得到广泛的应用，对它的研究方兴未艾。

The invention discloses a vehicle speed matching method based on linear array CCD image, including the following steps that: two linear array CCD video cameras are respectively arranged on two sections positioned on a road at intervals; both linear array CCD video cameras face downwards and are provided with infrared ray laser source; the frame rate of each CCD video camera is more than 1,000 frames per second, and the resolution is more than 1,024 lines; correlation matching computation of the image sequences obtained by both linear array CCD video cameras is carried out to obtain the time difference of the same object in two image sequences; finally, by means of the time difference and the distance between both cameras, the driving speed of an object vehicle can be obtained according to the velocity formula V=s/t.

本发明公开了一种基于线阵CCD图像的车辆速度匹配方法，该方法在道路相距一定距离的两个断面上分别安装两个线阵CCD摄像机，两个线阵CCD摄像机指向垂直向下，线阵CCD摄像机上配有红外线激光源，线阵CCD摄像机的帧速率大于1000帧/秒，分辨率大于1024线；对两个线阵CCD摄像机得到的图像序列进行相关匹配计算，从而获得同一个目标在两个图像序列中的时间差，利用该时间差和两个摄像机的距离，根据速度公式V＝s/t即可以得到目标车辆的行进速度。

You can do some assertiveness training.

你可以进行一些自信训练。

We were well on the path to making a rear-wheel-drive global platform," says Mays."

我们正致力于建立一个后轮驱动的平台，"Mays这样说道。"