I’m a postdoc at UBC. My work focuses on actionable control methods based on RL for real-world applications. As a postdoc and beyond, my plans are to solidify the many tantalizing connections among RL, model predictive control, and ReLU DNN structures. Mainly, there are sparse structural, functional, and algorithmic connections at play. A unified viewpoint of all three would make RL more appealing for real-world applications while also making MPC more flexible and scalable under general learning algorithms.

My PhD is in Applied Mathematics from UBC where I worked with Philip Loewen and Bhushan Gopaluni. Here you can find my thesis on Deep reinforcement learning agents for industrial control system design. The first part of my thesis focuses on the practical implementation of RL and meta-RL for PID tuning. I later developed a general method for synthesizing stabilizing controllers with any RL algorithm using input-output data. The domain for this work is industrial process control. But RL is a very versatile framework and I am keen on branching into other applied domains as well, particularly with an environmental focus.

Publications

Most of my papers are linked to arXiv or a DOI. If you can’t find one, feel free to get in touch. You can also find my articles on my Google Scholar profile.

1. Journal Papers
   1. Stabilizing reinforcement learning control: A modular framework for optimizing over all stable behavior
      Nathan P. Lawrence, Philip D. Loewen, Shuyuan Wang, Michael G. Forbes, R. Bhushan Gopaluni
      Automatica. 2024.
      [Link] [arXiv]
   2. Machine learning techniques for industrial sensing and control: A survey and practical perspective
      Nathan P. Lawrence, Seshu Kumar Damarla, Jong Woo Kim, Aditya Tulsyan, Faraz Amjad, Kai Wang, Benoit Chachuat, Jong Min Lee, Biao Huang, R. Bhushan Gopaluni
      Control Engineering Practice. 2024.
      [Link] [arXiv]
   3. Automated deep reinforcement learning for real-time scheduling strategy of multi-energy system integrated with post-carbon and direct-air carbon captured system
      Tobi Michael Alabi, Nathan P. Lawrence, Lin Lu, Zaiyue Yang, R. Bhushan Gopaluni
      Applied Energy. 2023.
      [Link] [arXiv]
   4. Meta-reinforcement learning for the tuning of PI controllers: An offline approach
      Daniel G. McClement, Nathan P. Lawrence, Johan U. Backström, Philip D. Loewen, Michael G. Forbes, R. Bhushan Gopaluni
      Journal of Process Control. 2022.
      [Link] [arXiv]
   5. Deep reinforcement learning with shallow controllers: An experimental application to PID tuning
      Nathan P. Lawrence, Michael G. Forbes, Philip D. Loewen, Daniel G. McClement, Johan U. Backström, R. Bhushan Gopaluni
      Control Engineering Practice. 2022.
      [Link] [arXiv]
   6. Toward self‐driving processes: A deep reinforcement learning approach to control
      Steven Spielberg, Aditya Tulsyan, Nathan P. Lawrence, Philip D. Loewen, R. Bhushan Gopaluni
      AIChE Journal. 2019.
      [Link] [arXiv]
2. Conference Proceedings
   1. Deep Hankel matrices with random elements
      Nathan P. Lawrence, Philip D. Loewen, Shuyuan Wang, Michael G. Forbes, R. Bhushan Gopaluni
      Learning for Dynamics & Control Conference. 2024.
      [Link] [arXiv]
   2. Reinforcement learning with partial parametric model knowledge
      Shuyuan Wang, Philip D. Loewen, Nathan P. Lawrence, Michael G. Forbes, R. Bhushan Gopaluni
      IFAC World Congress. 2023.
      [Link] [arXiv]
   3. A modular framework for stabilizing deep reinforcement learning control
      Nathan P. Lawrence, Philip D. Loewen, Shuyuan Wang, Michael G. Forbes, R. Bhushan Gopaluni
      IFAC World Congress. 2023.
      [Link] [arXiv]
   4. Meta-reinforcement learning for adaptive control of second order systems
      Daniel G. McClement, Nathan P. Lawrence, Michael G. Forbes, Philip D. Loewen, Johan U. Backström, R. Bhushan Gopaluni
      AdCONIP. 2022.
      [Link] [arXiv]
   5. A meta-reinforcement learning approach to process control
      Daniel G. McClement, Nathan P. Lawrence, Philip D. Loewen, Michael G. Forbes, Johan U. Backström, R. Bhushan Gopaluni
      AdCHEM. 2021.
      [Link] [arXiv] | Keynote Paper
   6. Reinforcement learning based design of linear fixed structure controllers
      Nathan P. Lawrence, Gregory E. Stewart, Philip D. Loewen, Michael G. Forbes, Johan U. Backstrom, R. Bhushan Gopaluni
      IFAC World Congress. 2020.
      [Link] [arXiv]
   7. Optimal PID and antiwindup control design as a reinforcement learning problem
      Nathan P. Lawrence, Gregory E. Stewart, Philip D. Loewen, Michael G. Forbes, Johan U. Backström, R. Bhushan Gopaluni
      IFAC World Congress. 2020.
      [Link] [arXiv]
   8. Almost Surely Stable Deep Dynamics
      Nathan P. Lawrence, Philip D. Loewen, Michael G. Forbes, Johan U. Backström, R. Bhushan Gopaluni
      NeurIPS. 2020.
      [Link] [arXiv] | NeurIPS Spotlight
   9. Modern machine learning tools for monitoring and control of industrial processes: A survey
      R. Bhushan Gopaluni, Aditya Tulsyan, Benoit Chachuat, Biao Huang, Jong Min Lee, Faraz Amjad, Seshu Kumar Damarla, Jong Woo Kim, Nathan P. Lawrence
      IFAC World Congress. 2020.
      [Link] [arXiv]
3. Theses
   1. Deep reinforcement learning agents for industrial control system design
      Nathan P. Lawrence
      The University of British Columbia. 2023.
      [Link]
   2. Convex and nonconvex optimization techniques for the constrained Fermat-Torricelli problem
      Nathan Lawrence
      Portland State University. 2016.
      [Link]