@article{modelfreelqrbasedpidcontrollerfor,
  title = {Model-free LQR based PID controller for trajectory tracking of 2-DoF helicopter: comparison and experimental results},
  author = {Nouha Rouis and Ibrahima N'Doye and Taous-Meriem Laleg-Kirati},
  year = {2021},
  eprint = {2103.10988},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2103.10988v1},
}