The cause of vibration on the turbogenerator stator end winding is analyzed, and the meaning of natural frequency test and vibration measurement is discussed.
本文分析了引起汽轮发电机定子绕组端部振动的原因，以及固有频率试验和振动测量的意义。
In this paper several dynamic testing methods of electrohydraulic servo systems are introduced, including stochastic noise test, hammering test and sweep frequency test.
本文介绍电液伺服系统的几种动态测试方法，包括随机噪声测试，锤击法测试和扫频测试。
This paper intends to introduce a method of frequency test of various circuits of type 8031 SCP and its application in the comprehensive figure display instrument of tower cranes.
本文介绍8031单片机多路测频的一种方法及其在塔吊综合数显仪中的应用。
The theory and implementation of frequency test system in the aspects of both hardware and software are discussed in detail. Finally the diagram and the result of simulation are demonstrated.
详细讨论了脉冲频率计数系统在硬件和软件方面的设计原理与实现方法，同时给出了设计流程图和仿真波形图，最后给出了仿真结果。
The theory and implementation of frequency test system in the aspects of both hardware and software are discussed in detail. Finally the diagram and the result of simulation are demonstrated.
详细讨论了脉冲频率计数系统在硬件和软件方面的设计原理与实现方法，同时给出了设计流程图和仿真波形图，最后给出了仿真结果。
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