Output feedback regulation control for a class of cascade nonlinear systems and its application to fan speed control

• DOI: 10.1016/j.nonrwa.2011.10.005
• Publication Date: 2011-11-10T08:15:27Z
• Authors: Yuqiang Wu; Jiangbo Yu; Yan Zhao
• Keywords: 0209 industrial biotechnology; 02 engineering and technology

Abstract The output feedback regulation problem is considered for a class of nonlinear systems with integral input-to-state stable (iISS) inverse dynamics and unknown control direction. The system output together with the complete unmeasured state components appears in the system uncertainties. A systematic output feedback control scheme is presented with the help of a dynamic observer, whose gain comes from an off-line time-varying Riccati matrix differential equation. The proposed scheme can be applied to the analysis of the speed tracking control of a fan. The simulation results demonstrate the validity of the presented algorithm.