恒定

The present invention relates to a method for heuristically starting up DC brushless servo electric machine, including the following steps of (1) after powerup of an increment type photoelectric encoder, electrifying a stator winding two by two with identical time interval to generate six-directional stator winding resultant magnetic fields;(2) detecting six different angles rotated by the rotor within identical tiny time interval by the photoelectric encoder;(3) selecting most positive value rotation angle from the six different angles, and determining maximum torque corresponding to the stator winding resultant magnetic field, and implementing servo startup using the maximum torque as constant starting torque;(4) after the zero-point signal of the photoelectric encoder occurring, switching to servo operation with normal constant torsion.

本发明直流无刷伺服电机试探启动方法，采用如下步骤：(1)增量式光电编码器上电后对定子绕组采用相同的时间间隔两两通电，顺序产生六个方向的定子绕组合成磁场；(2)由增量式光电编码器检测出转子在相同的微小时间间隔内分别转过的六个不同的角度；(3)从转子六个不同的角度中选出最大正值的转角，确定相应定子绕组合成磁场对应的最大转矩，并以该最大转矩为恒定启动转矩进行伺服启动；(4)当增量式光电编码器零点信号出现后，切换为正常恒转矩伺服运行。

Mathematics Unaffected by a designated operation, as a transformation of coordinates.

恒定的：不受指定运算，例如坐标的变换影响的

Two-up:(1) Printing two copies of the same thing at one impression by using duplicate plates or a step-and-repeat machine.

这是一个振幅恒定的波，在共轭的象平面上也是如此。

I remember when I 1st came here in 1993 when I 1st saw l'Avvocato Agnelli, a constant presence just like Dottor Umberto later.

我记住当我1 来这里在1993 当我1 看见l'Avvocato Agnelli ，恒定存在象Dottor Umberto 后。

This is a kind of dialectical concept of history. The classical historiography of Greece also emphasizes"change", but it treats the evolution of history in the light of permanent"unchangeability", i. e. it employs a somewhat metaphysical concept.

希腊古典史学也重视"变"，但它是从一个恒定"不变"的基点出发去观察历史的演变，这是一种带有形而上学思想的历史观。

His s pecial theory of relativity is what we dealt with last time; the effects on space and time of uniform constant motion.

我们上次讨论的是他的狭义相对论；恒定不变的匀速运动对时间和空间的影响。

The mass per unit volume of a substance under specified conditions of pressure and temperature .

在恒定压力下长度或面积或体积的微小变化和单位温度变化的比值。

For eliminate redundant stress in spring unit brought by continuously variation of strain,in wind spring device,the adopt spiral output wheel with continuously variant radii was used and the variation of moment can be canceled out by variation of radii,the approximate constant output force can be obtained.

为消除弹簧装置中应力随应变不断变化而产生的多余应力，在卷簧结构中，采用螺旋变径输出轮，用半径的变化抵消力矩的变化，获得近似恒定的输出力。在精度要求不高的场合，采用此方式可形成简便可靠的近似恒力的弹簧装置

The fractional change in length or area or volume per unit change in temperature at a given constant pressure.

在恒定压力下长度或面积或体积的微小变化和单位温度变化的比值。

According to the fact that a universal coupling was constant ly broken in a mine, the paper gave a common formula of the drive rate of a bi universal coupling on the basis of other people s work, and thus a universal conclusion was obtained that the drive rate can be kept constan

本文根据某矿山万向节频繁扭断事故的实例，在文献 [1]、 [2 ]的基础上，导出了双万向联轴节传动比的普遍公式，并得出了保持传动比恒定的普遍性结论。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新