The control scheme for multi pump operation is thus improved, which changes pump frequency and controls pump operation according to water consumption.
改进了多台水泵的控制方式，即根据系统用水量改变水泵频率从而控制水泵的运行情况。
Because of the limit in modern industry sites, the frequency of the process variables detect is different. We can resolve the problem by multi frequency and multi variable control.
在工业现场由于条件的限制，很多过程变量需要的检测频率并不一样，从而带来了多频多变量的控制问题。
The technique is based on multi- dimension space transform, the realizing of this technique is convenience, and it is easy to control the secret key of frequency hopping.
该方法基于多维空间变换，构造频率转移函数简单方便，而且便于跳频密钥的管理和控制。
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