实验结果表明，研制的智能超声波发生器频率跟踪迅速准确，并能实现振动系统的恒定振幅控制，可以实现振动系统的自动运行。
Preliminary experiments show that the smart ultrasonic generator based on the new method can quickly and accurately frequency track, and can work well with constant amplitude control.
实验结果验证了定子磁链定向的矢量控制策略既能保证定子输出频率恒定，又能较好地跟踪风力机的最大功率输出。
The stator flux-oriented vector controlling strategies of keeping stator frequency constant and capturing the maximum wind power are verified by experiment results.
在分析振动压路机振动频率控制系统的基础上，对控制器进行了设计，提出了采用PID控制实现振动频率恒定的方案。
On the basis of analyzing vibratory frequency control system of vibratory roller, the controller are designed and the plan of vibratory frequency constant control by PID are put forward.
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