LAUSR

Abstract The problem of controlling with saturated output-feedback (OF) temperature control a six-state (concentration-temperature) bistable train of three continuous stirred tank reactors with recycle is addressed. The closed-loop system must operated about the unstable steady-state (SS) by manipulating the coolant temperature on the basis of one of the tank temperatures. The aim is to attain robust closed-loop stability with a control scheme as simple as possible. The constructive combination of advanced and industrial control ideas yields a the behavior of a passive nonlinear state-feedback (NLSF) stabilizing controller can be recovered with an industrial-type proportional-integral (PI) control with anti-windup protection plus criteria to choose the sensor location as well as control gains and limits.