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Then, the same approach is applied to dual-motors redundantly driven systems with unknown backlash and friction.

保证系统运行过程中，各驱动子系统之间具有较好的同步协调性。

Reedy have announced the release of their all-new sensorless Micro Brushless System comprising of motors and ESC.

芦苇已经宣布释放其所有新的微型传感器组成的无刷系统电机和ESC 。

In the process, a still robot is regarded as a beacon, while a moving robot driving itself toward it with infrared sensors for localization and completes the docking process. Two infrared sensors on top of the front-end attachment of the moving robot are rotated by two stepper motors and the infrared ray emitted are reflected respectively by the two reflectors on top of the back-end attachment of the beacon robot.

在该方法中，设定一个静止的信标机器人，移动机器人利用红外传感器定位，安装在移动机器人前端连接件上的两个红外传感器分别在步进电机的驱动下旋转，它们发出的红外光分别被信标机器人后端连接件上的两个反射体反射回来。

Of particular importance in the design of hybrid rocket motors is the fuel surface regression rate and the manner in which it varies with operation conditions.

燃面后退速率以及在工作条件改变过程中的变化，对混合发动机的设计有很大的影响。

When and why did General Motors slot into reverse gear?

什么时候和为什么通用汽车公司进入倒车档？

RUIAN Dongtian car parts factory industry RUIAN Dongtian car industry Auto Parts Factory in China combined are - Ruian City, Zhejiang Province, was founded in 1983, is located on the southeast coast of Zhejiang Province, west of 104 State Road, north gold Wen Railway and Wenzhou airport, excellent geographical location, transportation convenient, fast, is a company specializing in the production of oil pressure gauge sensor, water temperature table sensors, temperature switches, oil pressure switch, brake light switch, reversing lamp switch, stepper motor, idle speed motors and other electrical products exports backbone enterprises.

瑞安市东田车业部件厂位于中国汽摩配之都--浙江省瑞安市，创建于1983年，地处浙江省东南沿海，西靠104国道，北接金温铁路与温州飞机场，地理环境优越，交通方便、快捷，是一家专业生产机油压力表传感器、水温表传感器、温控开关、油压开关、刹车灯开关，倒车灯开关，步进电机，怠速马达等其它电器产品系列出口的骨干企业。

Working in concert with Mitsubishi Motors "Roll Control Suspension" technology, this design delivers very high levels of ride and road holding.

协同工作与三菱汽车"减少控制悬挂"技术，这种设计提供了平顺性和道路持有很高的水平。

Low pressure vacuum carburizing and high pressure gas quenching ,was adopted to ring gear of motors.

本文通过对轿车齿套的试验证明，采用低压真空渗碳+高压气淬的热处理方法，可得到较小的变形，且具有环保、节能、无表面内氧化、生产率高等优点。

Firstly, this paper introduced the basic concepts about interharmonic, including definitions, hazards and limited values. Then main interharmonic sources were shown, such as converter devices, inductive motors, arc furnaces, rolling mills and ripple control signals.

本文主要内容如下：(1)本文综述了对间谐波的认识，其中包括定义、危害和限值等，并结合实际经验，详细介绍了每一种间谐波源：变频装置、感应电机、电弧炉、轧钢机和音频控制信号。

With the id￠=0 vector control and the feedforward compensation of cogging, the minimum force ripple and maximum efficiency control of non-sinusoidal BEMF SPM motors can be obtained.

考虑永磁磁链谐波对永磁磁链导数矢量幅值及相位的影响，通过引入d￠q￠轴坐标系，提出一种id￠=0的非正弦波BEMF SPM电机矢量控制新方法，结合齿槽前馈补偿可以实现非正弦BEMF SPM电机的最小推力纹波最大效率控制。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。