Flotation Process Control by Adaptive Control Method

本文对模型参考自适应控制系统(MRACS)在某矿厂的应用进行了初步研究。在该装置中，经常使用的是PID调节器。然而，IF在时变对象上是不可用的。因为通常需要对PID参数进行重新调整。然后，将MRACs应用于工厂。它会自动调整参数，但对随机噪声的鲁棒性不强。选矿厂通常是时变的，其输入/输出信号含有随机噪声。因此，在MRAC的应用中，有必要提高对噪声的鲁棒性。Peterson et.艾尔(1982)提出了一种具有死区的稳健MRACS自适应算法。然而，该系统在没有噪声知识的情况下不能使用。本文描述了一种纠正这一缺陷的方法及其在选矿厂PH调节过程中的应用。仿真结果表明了该控制方法的有效性。在此基础上，建立了PH值调节流程，并与浮选试验机相连。然后，在测试仪上实际测量PH值。结果表明，该控制方法对时变对象是有效的，对随机噪声具有较强的鲁棒性。

This paper presents a fundamental sudy on the application of the model refernce adaptive control system (MRACS) to a mineral plant. The PID regulator is frewuently used in the plant. However, if is not available on the time-varying plant. because the PID parameters are usually necessary to be readjusted. Then, the MRACS is trid to apply in the plant. it automatically readjusts its parameters, but it is not robust to the randow noise. A mineral processing plant is usually time-varying, and theid input/output signals contain random noises. Therefore, it is necessary to improve the robustness to the noise on the application of the MRACS. Peterson et. al. (1982) presented a robust MRACS with a dead zone to the adaptation algorithm. However, this system can not be used without knowledge for the noise.This paper describes a method which corrects this defect and its application to the PH-conditioned process in a mineral processing plant. Some simulation results are illustrated to show the effectiveness of the presented control method. And next, PHconditioned process was set up and connected with a flotation tester. Then, the PH value was actually measured at the tester. The results show that this control method is available on the time-verying plant, and robust to the random noise.