Comparison of Disturbance Rejection with Derivative State Feedback and Active Disturbance Rejection Control: Case Study

A comparison and case study of disturbance rejection control applied to a two-mass system is proposed in this paper. The first approach is the derivative state feedback control law with unknown input observer (DSF-UIO) while the second one is the active disturbance rejection control (ADRC). The first one requires the knowledge of a model, such as the state space representation and is based on a rather good knowledge of the physical phenomena while in the second approach a simpler model can be considered since the negative effects of modelling uncertainty are compensated.

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