ADAPTIVE INPUT-OUTPUT LINEARIZING CONTROL OF A CONTINUOUS STIRRED-TANK REACTOR

In this paper, we report the application of two different parameter ad aptation schemes used to improve the performance of input-output linea rizing control of an exothermic continuous stirred tank reactor (CSTR) . The first technique is based on ensuring the stability of the contro l system in the sense of Lyapunov when there are variations in the par ameters appearing linearly in the linearizing control law. The second approach considers recursive least squares for parameter estimation in dependent of the control system stability. When the reactor is subject ed to conditions of extreme parametric sensitivity and unstable operat ing conditions in the presence of variations in the process parameters , the parameter adaptive approach to linearizing control exhibits sati sfactory behavior in terms of offset free regulation and improved perf ormance.