QFT Organizer Design for Class of Nonlinear Uncertain System Using Curve Shaping Technique

Most of the practical systems are modeled by not considering the uncertainty. It creates difficulty to maintain the stability and required performance. In this effort a robust controller design techniques, using quantitative feedback theory (QFT) is presented. The controller performance is tested with a bioreactor. The designed controller ensured the robust performance analysis such as input and output disturbance rejection, set point tracking and sensor noise attenuation. The reference tracking input disturbance rejection and output disturbance rejection responses proves the effectiveness of regulator.