ROBUST-CONTROL OF INTERVAL PLANTS - A TIME-DOMAIN METHOD

A time-domain algorithm is proposed to control interval plants describ ed by impulse response functions. The closed-loop control actions are determined based on the interval ranges of the model parameters. Robus t steady-state performance in tracking a given set-point can be guaran teed if the sign of the static gain is certain despite possible open-l oop overshooting, delay, and nonminimum phase of the interval plants. Simulation examples are given to illustrate the performance. An applic ation example in welding process control is also included.