Active control for drill-string systems

It's well known that stick-slip vibrations existing in drill-string systems are extremely severe during drilling and are expected to be mitigated or eliminated. Considering this practical problem, we present a possible solution by using observer-based tracking controller, which only requires the top measurements and is easy to implement. This repository provides the code of the conference paper "Observer-Based Tracking Control for Suppressing Stick-Slip Vibration of Drillstring System". We hope this can provide help to people who are working on the related fields.

Please note that, this code is limited to academic use only.

Simulation figure 1:

Fig. 1 Stick-slip motion of drill-string system subjected to control input (10000 Nm) and weight on bit (97347 N)

Simulation figure 2:

Fig. 2 Performance of drill-string system with observer based tracking controller

Simulation figure 3:

Fig. 3 Performance of observer

If you find this helpful, please consider citing the paper

@article{Cheng2018ObserverBasedTC,
  title={Observer-Based Tracking Control for Suppressing Stick-Slip Vibration of Drillstring System},
  author={Jun Cheng and Min Wu and Luefeng Chen},
  journal={2018 37th Chinese Control Conference (CCC)},
  year={2018},
  pages={10254-10258}
}