Stabilizing High-order Delayed Systems with Minimum-phase Zeros Using Simple Controllers

Time-delay is a property present in many dynamical systems. When the delay is significant, compared with the main time constant in the process, it causes undesirable behaviours in a control system like poor performance, oscillations or even instability, (Kharitonov, 1998). This phenomenon can be found in many engineering systems such as: tele-operated process, chemical and biochemical engineering process, information and material transmission, (Wu et al., 2015). The particular problem of unstable systems with timedelay is usual in the chemical processes, such as continuously stirred-tank reactor (CSTR), (QingChang, 2006). Thus, the control and stabilization of delay processes becomes an interesting topic in which the explicit stability conditions for many unstable processes are not available yet.