The improvement of the traditional algorithm has been proposed. Since the academic community has not yet obtained a number of improvements to the traditional PI control algorithm that can be used for actual control, a new intelligent control algorithm in the performance test of the compressor is formed. In order to enable the computer to correctly identify the changing characteristics of the controlled quantity in the dynamic process, the following characteristic variable temperature and pressure changes are reflected by the length of the pipeline as a continent, thus causing changes in temperature and pressure. To lag behind for a while, Meng Er is the speed of change. The pure lag property of the object will lead to the untimely control effect, causing the system to overshoot and oscillate. In the industrial process control, the model of the object can often be described by the first-order inertia plus pure lag link. The transfer function is eighty-one for such a pair. The regulation of the Sichuan-like rivers is difficult to obtain good dynamic bamboo. In particular, when the lag time is large, continuous oscillation will occur.
One way to compensate is to use the Smith predictor. The added pure lag compensation link together with the control object constitutes a generalized object. It has a simple inertia link of the transfer function. When adjusting with the regulator, there is no longer a series of problems caused by hysteresis, and a better adjustment effect can be obtained. . Since the real object is just a generalized object plus a pure lag, the output of the system is nothing more than the hysteresis of the output of the generalized object. Through experiments, it is found that although the variables affect each other but the weight of each other is different, the inspiratory pressure has the greatest influence on the other two variables. The influence of the pre-valve temperature on the other two variables is the same. The change in suction pressure is the fastest from the curve, followed by the exhaust pressure, and the temperature change before the valve is the slowest. According to the above rule, the suction pressure is first adjusted to a predetermined range by using the following control sequence. Under normal circumstances, the exhaust pressure at this time can also reach a predetermined range, and the water volume regulating valve can be adjusted in a small range. If the pressure is within the predetermined range, if the suction pressure is out of range, fine-tune the suction pressure of the electronic expansion valve to the working condition and then adjust the water volume adjustment valve. Repeat the adjustment until the final adjustment.
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