Modified Equivalent-Input-Disturbance Approach to Improving Disturbance-Rejection Performance
Zewen Wang, Jinhua She, Zhentao Liu, Min Wu
Abstract
This article presents a modified equivalent-input-disturbance (MEID) approach that actively rejects exogenous disturbances. A dynamic compensator is newly introduced in a conventional equivalent-input-disturbance (EID) estimator to further suppress the disturbances. The mechanism of the MEID approach to improving disturbance rejection is analyzed based on the transfer characteristic from the EID to the output of the system, and a stability condition of the MEID control system is presented and is used to design the parameters of the system. A comparison with the conventional EID approach and the disturbance-observer method through experiments demonstrates the validity of the presented method.
Topics & Concepts
Disturbance (geology)Control theory (sociology)Transfer functionEstimatorStability (learning theory)Computer scienceEngineeringMathematicsControl (management)Artificial intelligencePaleontologyElectrical engineeringStatisticsBiologyMachine learningAdaptive Control of Nonlinear SystemsFault Detection and Control SystemsAdvanced Control Systems Design