Closed-loop system identification and controller tuning for constant-value control systems

A controller design method for constant value control systems has been proposed. The method requires only one-shot experimental data which is obtained from the stabilized closed-loop system when a known zero-mean noise is applied to the output of the plant. The data is used to estimate the plant model by the least square method. The controller is tuned by specifying the stable margin in consideration of the trade-off between the closed-loop bandwidth and the stability margin by a model-based approach in frequency domain. The effectiveness of the method is shown through a numerical example.