A New Method of Optimum Tuning for Cascade Control Systems

Abstract

      Cascade control systems are widely used in practice with one or more loops inside the primary loop and the controllers are in cascade. In this structure, the control signal calculated by the outer loop is the setpoint of the inner loop. This paper presents an algorithm that directly uses the experimental data to simultaneously tune parameters of the controllers in cascade control systems. The algorithm does not require a mathematical model of the plan but only one-shot experimental data collected from the closed loop system.