It is shown by theoretical analysis and simulation that this control low, which can applied to semi-close loop and full-close loop system, is simply in design and on-line realization.
理论分析和仿真结果表明：该控制方法设计简单，便于在线实现，并能同时应用于半闭环系统和全闭环系统。
2
The on-line application in Fujian Refinery shows that the model has a satisfactory accuracy, and it can be used for closed-loopcontrol and optimal operation.
The system had many features such as high speed, high accuracy, untouched measuring and closed-loopcontrol. The system is used on-line measuring and control of diameter measure.