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 multivariablecontrol.
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。
2
The problems are:the storage of cumulating variable at power off, multi-byte division, the detection of rotating speed and the control of facilities by AC power.
这几个问题是：累积量的掉电存储问题、多字节除法问题、转速的检测问题和交流电设备的控制问题。
3
The standard system matrix vector equations on multi-variablecontrol system are educed.