Abstract
In this paper, considering the disturbance in the four-tank system, the new active disturbance rejection control strategies are proposed to resolve the disturbance problem. In the first place, two forms with nonlinear function and linearized active disturbance rejection control are designed by using active disturbance rejection technology and the dynamic model of four-tank system. Among them, the linearized active disturbance rejection control can still arrange transition process for reference input, observe the order states of the system and compensate disturbance. Finally, the simulation and experimental results show that the proposed control strategy compared with the classical proportional integral differential method, active disturbance rejection control strategy can not only achieve good position control and disturbance suppression effect, but also show excellent effect in target tracking on the four-tank system.
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