LINEARIZATION AND CONTROL OF A NONLINEAR-SYSTEM VIA REACTION CURVE METHOD

The exact linearization technique is applied to transform a nonlinear system into a linear system, and two adjustable parameters, P-1 and P- 2, are introduced in the equivalent linear system to obtain an integra l action in the controller. The controller in the equivalent linear sy stem is tuned by using the Reaction Curve Method, which is widely used in chemical reactor control systems. The effects of the system parame ters are investigated by considering an example CSTR system, Simulatio n results show that output performance is not sensitive to the paramet er P-1, and a large value for the parameter P-2 is recommended for a b etter output response. Numerical simulations show that the method deve loped in this work yields control performance superior to that obtaine d from previous methods.