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This paper presents several control methods for BLDC motor, and describes their fundamental principles ,advantages and disadvantages in brief. The method of speed-independent function,based on a new flux linkage function,is explained in detail. This method makes it possible to detect the rotor position over a wide speed range from near zero to high speed.

本文介绍了几种无位置传感器无刷直流电动机的转子位置检测方法，并对它们的基本原理，优缺点作了简单的说明，详细地阐述了基于一种新磁链函数之上的与速度无关的位置函数控制方法，利用这种方法从零转速到高转速的宽速度范围内能检测到转子位置。

When the lock ring simultaneously with the question cone gear engagement ring gear, cone after contact friction moment in the role of the rapid speed of gear to reduce to synchronize with the speed equivalent to lock ring, the two synchronous rotation, relative to gear Central lock synchronization speed is zero, thus inertia torque also disappeared, then in force under the impetus of engagement sets unhindered and synchronization lock Gear engagement ring, and further engagement with the question of gear engagement ring gear and completed Shift process The topics mainly through the Pro / E synchronization software for the car to three-dimensional modeling structural design, and through the parameters of the design process to achieve its structure, and on this basis, the use of ANSYS FEM software structure of the typical synchronization And a finite element analysis, through structural analysis of its structural design is reasonable to assess and make recommendations to improve the design

当同步锁环内锥面与待接合齿轮齿圈外锥面接触后，在摩擦力矩的作用下齿轮转速迅速降低到与同步锁环转速相等，两者同步旋转，齿轮相对于同步锁环的转速为零，因而惯性力矩也同时消失，这时在作用力的推动下，接合套不受阻碍地与同步锁环齿圈接合，并进一步与待接合齿轮的齿圈接合而完成换档过程本课题主要是通过Pro/E软件对汽车同步器进行三维造型结构设计，并通过参数化实现其结构设计程序化，在此基础上，利用ANSYS有限元软件对典型同步器结构进行有限元计算与分析，通过结构分析对其结构设计的合理性作出评价并提出改进设计建议

The state equation of induction motor with G-type parameters was established and a flux observer was designed based on U-N model. The speed adaptive law was deduced by the theory of Lyapunov stability. A method of model reference adaptive speed estimation based on the full order flux observer was proposed and a scheme of induction motor direct torque control without speed sensor was studied.

建立了基于异步电机G-型参数的状态方程，给出了基于U-N模型的定子磁链观测器；基于李雅普诺夫稳定性理论推出了速度自适应律，给出了基于这种全阶磁链观测器方案的模型参考自适应速度辨识方法。

The high speed or super-high speed grindings force has the same variety regulation contrast to the common speed grinding, which can get the explanation from closely empirical formulas. Under the same grinding condition, the grinding force of laser trimming wheel is near to or slightly lower than the mechanical trimming wheel.

高速磨削力与普通速度磨削力具有相近的变化规律，这可从它们相近似的磨削力经验公式得到解释，在同一磨削工况下，激光修整砂轮的磨削力接近或略低于金刚石滚轮修整砂轮。

Normal playback speed, half speed, twice speed, etc.

正常的播放速度，有一半的速度，两次的速度，等等。

Normal playback speed, half speed, twice speed, etc.

正常的播放速度，有一半的速度，速度的两倍，等等

Normal playback speed, half speed, twice speed, etc.

正常重放速度，半速，两次的速度等。

XD-2003 strap machine is changed from XD-2002 machine which has a cast aluminium on the bed,making the screw,screwtube and speed reducer keeping concentric.the V-model manger on the bed is lower than the flat on which the speed reducer is fixed,the components are finished machining by machine tool.guaranteeing perpendicularity, degree of balance.speed reducer,screw and screwtube is fixed on the base,and the screwtube is in the mini-manger,then ensuring axis keeping concentric with sheath,screwtube feed opening has a chromium hard-wearing sheath,which can improve the lifetime of the screw and screwtube to threefold or to fourfold.

XD-2003 型塑料打包带机组，是在XD-2002型机组的机座上安装了一个铸铁机座，使螺杆，螺筒和减速机保持同心，座上的V型槽比安装减速机的平面低，其部件都是经过机床精加工完成的，保证了垂直度和平衡度。减速机和螺杆、螺筒置于底座上，且螺筒卡在微型槽内。确保轴与套保持同心，螺筒下料口处设有高铬耐磨衬套，这样可使螺杆、螺筒的寿命提高3-4倍。

Speed to make open own highly respectable and comfort, the treasure horse publicizes the driver's fun, the situation of the upscale car seems to the quilt this both have to the utmost, but the Caddy" shout" play, emphasize the special character of car at the same time, with speed, the treasure horse carried on the contrast;Sit to speed, open the treasure horse and play the Caddy;With a total dance, let consumer memory deep, feel keenly the approbation, Caddy nature it happy endless!

奔驰张扬自己的尊贵与舒适，宝马宣扬驾驶的乐趣，高档车的风头似乎被这两者占尽，而凯迪拉克&喊出&了玩，强调车子本身独特个性的同时，与奔驰、宝马进行了对比；坐奔驰、开宝马、玩凯迪拉克；与强者共舞，让消费者记忆深刻、深感认同，凯迪拉克自然其乐无穷！

During a normal course of operation, such a conventional fan revolution speed control method that calls for calculating a fan revolution speed by a system of a proportional integral control unit and changing the fan revolution speed so as to bring the actual temperature down to the target temperature presents no problem.

在正常的经营过程中，这样一个传统的风扇转速控制方法，需要计算风扇转速由一个系统的比例积分控制单元和改变风扇转速，使实际温度下降到目标温度没有问题。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。