查询词典 brake resistance

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。

At first, the article introduces the method to test the equivalent mass, the static moment of resistance, and the braking deceleration of the brake system and to examine the speed and the force of the hoisting system. According to the detecting method that the author put forwards, the parameters such as the brake torque, the time of idle motion, the brake distance and so on can be obtained.

文章首先介绍了提升机闸控系统的变位质量、静阻力矩、制动减速度以及提升系统的运行速度、拖动力的测试方法，然后依据作者提出的检测方法，得到闸控系统的制动力矩、空动时间和制动运行距离等参数。

STRUCTURE: Titanium and composites used extensively, with particular emphasis on corrosion resistance; fully articulated three-blade coaxial contrarotatmg rotors have all-composites blades with carbon fibre and glass fibre main spars, pockets (13 per blade) of Kevlar-type material, and filler similar to Nomex; blades have non-symmetrical aerofoil section; each has ground-adjustable tab; each lower blade carries adjustable vibration damper, comprising two dependent weights, on root section, with further vibration dampers in fuselage; tip light on each upper blade; blades fold manually outboard of all control mechanisms, to folded width within track of main landing gear; rotor hub is 50% titaniuin/50% steel; rotor brake standard; all-metal fuselage; composites tailcone; fixed incidence tailplane, elevators, fins and rudders have aluminium alloy structure, composites skins; fins toe inward approximately 25°; fixed leading-edge slat on each fin prevents airflow over fin stalling in crosswinds or at high yaw angles.

结构：钛和复合材料广泛使用，耐腐蚀性能与特别强调，充分阐明三叶片转子同轴contrarotatmg有碳纤维和玻璃纤维的主要棒材全复合材料桨叶，口袋（每刀片13）凯夫拉型材料，类似的Nomex纤维填料；叶片非对称机翼部分，每有地面可调选项卡，每降低叶片振动阻尼器进行调节，包括两部分依赖重根，在机身进一步减振装置；小费每个刀片上轻；刀片倍手动舷外所有控制机制，折叠宽度内的主起落架的轨道；转子中心为50％titaniuin/50％钢；转子制动标准；全金属机身，复合材料tailcone，固定发生机尾，电梯，蛙鞋和方向舵的铝合金结构，复合材料的皮肤；鳍鳍在每个脚趾向内约25 °；固定领先的板式翅片防止了侧风或气流停滞在高偏航角度。

In view of this fault features discussed judgment is that the main motor brake problems more likely, as a result, and then by careful observation, he finally found Braker friction wheel in closing the gap between the time of separation are uneven, there was a slight touch of local sweep／ to the corresponding axis on the spindle motor, which enables some resistance.

鉴于这一障碍特点，笔者开端鉴定是宾电机制动器呈现题目的不定性较大，于是，再通功不苛的查察，毕竟发掘制动器上的摩擦轮在呼分别离时的间隙有不平均不梢体，部分有惨重碰擦到对应的轴轮上，这样使电机宾轴爆发必定的阻力。

It is clear that when the book was attached to the multifraction run and electro-optical control at run time, motor brake is frequently used for closing the case of separation action, so that, if the brake friction wheel every time suck-journeyuva or slightly slightly the lawyers'gowns so that it tends to concentrate on local contrate friction to the corresponding axis wheels, and an increase in the work of the resistance of the motor, which in turn lead to a book should be sent along to run slowly.

很较着，当书夹在独不宾运行和光电把持运行时，电机的制动器是在屡不主息呼分别离动息的环境下举行的，这样，当制动器上的摩擦轮每不宾呼分的旅程稍有不到位或稍有方向时，不离便当使其方向的部分端面摩擦到对应的轴轮上，而补充电机的工息阻力，进而引起书夹运行速率减缓。

The paper analyses the effect of brake resistance of discal brake stop system,stain of brake_plate and the rellability of hydraulic station on elevator's safety running by abundantly spot testing.

通过大量的现场测试，分析了盘式闸制动系统的制动器阻力、闸盘污染以及液压站的可靠性对提升机安全运行的影响，提出了改造意

The formulation of JG3 synthetic automobile brake oil is explained. It is verified bytest that this product offers super vapour -- lock resistance under high temperature, good lowtemperature fluidity, corrosion resistance, and rubber gasket non -- solvency . The formula canmeet GB10380--89 standard and the bench tester requirement.

叙述了 JG3合成汽车制动液的配方研制过程，试验证明，该产品具有优良的高温抗气阻性、良好的低温流动性、抗腐蚀性，以及对橡胶皮碗的不溶胀性，该配方已达到GB10830—89标准及台架试验要求。

Furthermore the compression resistance, wear-resistance and temperature rising of the friction disk which is the most work part of the brake are calculated.

此外对制动器的主要工作部件—摩擦衬片进行耐压、耐磨损和温升等方面的计算。

By considering wind resistance and wheel rolling resistance in vehicle single wheel brake model, the control technology of realizing the shortest brake distance has been studied by utilizing the optimal control theory, and the shooting methods based on initial variable guess technique has been provided to realize numerical calculation.

5在考虑风阻和轮胎滚动阻力的工况下，对以最短制动距离为目标的ABS控制律进行了研究，并利用基于初值猜测技术的打靶法进行了数值仿真。

On the basis of thorough analysis on the service condition of brake disk of automobile, this paper puts forward the mechanic properties that brake disk should have: higher intensity and abrasion resistant ability, high heat retaining performance, good heat durability, and good vibration damping resistance.

在全面分析汽车制动盘的服役条件的基础上提出了制动盘应当具备的机械性能：较高的强度和耐磨损能力；高的蓄热性、良好的导热性与抗热裂性；抗振动衰减和抑制振鸣效果好。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。