Active disturbance rejection control with input prediction for systems with time-delay

摘要

This paper presents an input prediction based active disturbance rejection control scheme for systems with time-delay. The new scheme is motivated by the principle of Smith-predictor and traditional active disturbance rejection control. In order to make the transitive relation between the virtual control input and actual output approach a pure inertial element, an input predictor is adopted. The approximate error forms part of total error as well as the internal uncertainties and external disturbances, which can be easily dealt by traditional active disturbance rejection controller. Numerical examples and simulations based on the fuel dynamics of a boiler turbine unit show the improvement of the new method.