Human-In-The-Loop stability analysis: pure gain human model

For the tasks that require very accurate control commands, such as aerial refueling or aircraft landing, pilots are shown to produce control commands resembling the output of a pure gain controller. Therefore, analyzing the stability of the uncertain nonlinear closed loop system with a pure gain pilot model should be done at first.

Human-In-The-Loop stability analysis: lag filter

Another commonly employed model, to represent the inability of the human operator to respond to high frequency inputs, is the lag filter. In our second analysis, we show the stability properties of the human-in-the-loop control system where a lag filter operator model is utilized.

Related references

Shahab Tohidi, and Yildiray Yildiz, “Adaptive Control Allocation: A Human-In-The-Loop Stability Analysis,” accepted for presentation at International Federation of Automatic Control (IFAC)2020.