Active disturbance rejection solution for single water tank systems with high-precision

摘要: Due to the nonlinearities, disturbances and uncertainties of single water tank system, an active disturbance rejection control (ADRC) solution with high-precision was proposed. Firstly, a nonlinear mechanism model built based on theories fluid dynamics for system. Then, linearized in static work point get its simplified model. Secondly, first-order linear ADRC solutions system models unknown order were designed. With simple “integrator series” as normalized type feedback parts dynamic is different from are treated total disturbance. So it estimated by second-order extended state observer canceled out law. The disturbances, reduced canonical form chain integrators. Simulation results show that both ADRCs have better performances than PID controller disturbance-rejection robustness.