Linear Active Disturbance Rejection Control Tuning Approach Guarantees Stability Margin

This paper investigates the frequency properties of linear active disturbance rejection control. For stable or critical stable second-order LTI plants, it proposes a new parameter tuning approach. The approach is proved that can guarantee the closed-loop has a given gain crossover frequency and a phase margin no less than a given value between 32 degrees and 73 degrees.