Explained with emphasis USES the BPTS series frequency changer to the engine bed main axle velocity modulationplan transformation, finally has produced the engine bed movement performance condition.
重点说明了利用BPTS系列变频器对机床主轴的调速方案改造，最后给出了机床运行的性能状况。
2
The basic principle of the linear frequency modulation absolute distance interferometric plan and the problems existed in beating frequency measurement are described.
论述了线性调频绝对距离干涉测量方案的基本原理以及拍频测量中存在的问题；
3
Finally, the plan of implementing DQPSK digital modulation signal regeneration through adopting DSP chip is discussed and diagrams are given.