本绕线式电动机转子电路脉冲调速系统模拟试验，省去了测速发电机，而利用转子电势组成速度负反馈系统。
The model test tried on this system did not use the tachometer generator but used rotor electromotive force instead to form the speed negative feed-back system.
由自感知电压引入速度负反馈闭环控制，并由假设模态法将位移按模态展开，求解了悬臂梁结构的动态特性；
The mathematical models based on the assumed modes method and a closed loop velocity feed back control law are developed to describe the flexural vibration dynamic behaviors.
这不仅导致在上面列出的问题，这些问题通常由负反馈的使用更正减少，而且还提高阶段的线性度和速度。
This not only results in a reduction in the problems listed above, which are normally corrected by the use of negative feedback, but also improves phase linearity and speed.
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