Abstract
Decoupling control of nonisothermal CSTR with dead times in control variables was investigated on the basis of a linear time-varying time-delay model by which both nonlinearity and time-delay characteristics involved in the CSTR dynamics are simultaneously considered. A pair of nonlinear time-delay decouplers were theoretically derived and the feasibility of designing a decoupling control system which requires the estimation of future values of the state variables was ensured by using a predictive scheme in combination with the control system. For the purpose of improving the control performance of the decoupling control system in which incorrect design of the decouplers is caused by identification error of uncertain parameters present in the CSTR dynamics, a feedback control system with the Smith compensator was designed for incompletely decoupled CSTR and the robustness of such feedback control system to disturbance was shown by simulations.
