外文翻译--研究利用差动齿轮系实现机械混合压力(编辑修改稿)

外文翻译--研究利用差动齿轮系实现机械混合压力(编辑修改稿)内容摘要：

tion. When the servomotor stops, n2 = 0 , only the angular velocity of the conventional motor affects the output angular velocity n0 . The servomotor’s influence on the output motion. When the conventional motor stops, n1 = 0 , only the angular velocity of the servomotor affects the output angular velocity n0 , where 1 n0 represents axis 0 angular velocity, and 1 i20 represents total drive ratio from axis 2 to axis 0 including differential gear train and reducing unit II when axis 1 (servomotor axis) is fixed. The conventional motor’s and servomotor’s influence on the output motion. When the conventional motor and the servomotor run at the same time through the position of the differential gear train, the output velocity can be expressed as . Because the servomotor can run at arbitrary angular velocity between the zero and specific velocity in both positive and negative directions, n2 can be expressed as .where K is the ratio of the actual angular velocity to the specific angular velocity of the servomotor。 the value is arbitrary between −1 and +1, including zero. n2e is the specific angular velocity of the servomotor. Adjustablespeed amplitude and differentialspeed ratio Adjustablespeed amplitude. In order to correctly denote the variable velocity of the differential gear train of the hybrid mechanism, the concept of adjustablespeed amplitude is introduced. As shown in Figure 1, adjustablespeed amplitude is the ratio (or percentage) of absolute value of up and down adjustable amount to the base speed. In the differential gear train of the hybrid mechanism, the adjustablespeed amplitude equals the ratio value of axis 0 output speed of operating a single servomotor at the specific speed to axis 0 output speed of operating a single conventional motor[13]. In the differential gear train of the hybrid mechanism, the adjustablespeed amplitude is the most basic and the most important technology parameter. It not only determines the matching relationship of the speed of the two input axes, but also decides the matching relationship of the installed capacity of the servomotor and the conventional motor Differentialspeed ratio. The differentialspeed ratio is usually used to express adjustable speed technology performance in the differential gear train. It is an important technology parameter of the differential effect in the differential system. The differentialspeed ratio equals the reciprocal value of the adjustablespeed amplitude. It can be expressed as According to the fact that the angular velocity is in inverse proportion to its torque and that the same load is driven by conventional motor and servomotor, an equation expressed with the powers of the two motors can be deduced, where P1 is the power of the conventional motor, P1 = M1n1 . P2 is the power of the servomotor, P2 = M2n2e . The working load power distribution Supposing that the working load power of the mechanical press is P0 , the power relationship between the conventional motor, the servomotor and working load can be expressed as below: Figure 3 Physical sense of the adjustablespeed amplitude. From eqs. (9)― (11), the output powers of the conventional motor and the servomotor are determined by the value of factor K, which is actually equal to the change ratio of angular velocity of the servomotor. Hence when the output angular velocity runs in different working region, the ratio of bearing load of the two motors is different, too. The output axis running at the basic speed. When the output angular velocity of the servomotor equals zero, that is, K = 0 , P2 = 0 , from eq. (9), we have .Here the conventional motor bears all the loading power. The output axis running in the increasing speed region. The servomotor runs in the positive direction, 0≤ K≤ 1 , and both P1 and P2 are positive values, so both the conventional motor and the servomotor bear a part of the working load. Thus the conventional motor bears %― 100% working load and the servomotor bears only 0― % working load. The value of the adjustablespeed and the differentialspeed ratio determine the load distribution between the two motors. The output axis running in the decreasing speed region. In the decreasing speed region, the servomotor runs in negative direction, and the range value of K is −1≤ K≤ 0 . By eqs. (9) and (10), the P1 is positive, and the P2 is negative. The negative value of the servomotor power shows that the servomotor power is already the working resistance. Hence the conventional motor is not only doing work to the working load, but also doing work to the servomotor power, When the angular speed is in the region 0― n2e, the load of the conventional motor is Thus when the output angular sp。