A Variable Parameter Model-Free Adaptive Control Algorithm and Its Application in Distillation Tower System

In order to achieve better control performance of chemical process, model free adaptive control (MFAC) scheme is improved by adding two new parameters L
₁
, L
₂
, furthermore to apply in distillation tower system. Compared with basic MFAC, the number of parameters in this novel method is reduced and variable. Firstly, nonlinear system with time-varying desired output is used to carry out numerical simulation for the sake of verifying the effectiveness of this algorithm. After that, the improved MFAC algorithm is applied to the control of the distillation tower system, and the result fully demonstrates the proposed algorithm has strong stability, fast tracking speed. At last, for many systems with time delay in chemical process, such as distillation tower system, a set of validated control method frameworks is proposed in this paper. It is expected to be universally popularized and applied to the control of chemical process.