State estimation of the Stefan PDE: A tutorial on design and applications to polar ice and batteries

S Koga, M Krstic - Annual Reviews in Control, 2022 - Elsevier
The Stefan PDE system is a representative model for thermal phase change phenomena,
such as melting and solidification, arising in numerous science and engineering processes …

Control of the Stefan system and applications: A tutorial

S Koga, M Krstic - Annual Review of Control, Robotics, and …, 2022 - annualreviews.org
The so-called Stefan system describes the dynamical model of the liquid–solid phase
change in materials ranging from water and ice in the polar caps to metal casting and …

[HTML][HTML] Neuron growth control and estimation by PDE backstepping

C Demir, S Koga, M Krstic - Automatica, 2024 - Elsevier
Neurological disorders, such as spinal cord injuries, Parkinson's disease and Alzheimer's
disease, limit the functionality of neurons. A recent medical therapy, Chondroitinase ABC …

Observer-based event-triggered boundary control of the one-phase Stefan problem

B Rathnayake, M Diagne - International Journal of Control, 2024 - Taylor & Francis
This paper presents an observer-based event-triggered boundary control strategy for the
one-phase Stefan problem, utilising the position and velocity measurements of the moving …

Controllability of the Stefan problem by the flatness approach

B Colle, J Lohéac, T Takahashi - Systems & Control Letters, 2023 - Elsevier
We show the boundary controllability to stationary states of the Stefan problem with two
phases and in one dimension in the space variable. In the case of an initial condition that is …

Safe PDE backstepping QP control with high relative degree CBFs: Stefan model with actuator dynamics

S Koga, M Krstic - IEEE Transactions on Automatic Control, 2023 - ieeexplore.ieee.org
High-relative-degree control barrier functions play a prominent role in automotive safety and
in robotics. In this article, we launch a generalization of this concept for PDE control, treating …

Event-Triggered Control of Neuron Growth with Dirichlet Actuation at Soma

C Demir, S Koga, M Krstic - arXiv preprint arXiv:2310.00131, 2023 - arxiv.org
We introduce a dynamic event-triggering mechanism for regulating the axonal growth of a
neuron. We apply boundary actuation at the soma (the part of a neuron that contains the …

Energy storage in paraffin: A PDE backstepping experiment

S Koga, M Makihata, R Chen, M Krstic… - IEEE Transactions on …, 2020 - ieeexplore.ieee.org
This article proposes a novel control algorithm of a thermal phase-change process and
shows its experimental verification using paraffin as a phase-change material (PCM). The …

Control of the vertical gradient freeze crystal growth process via backstepping

S Ecklebe, F Woittennek, J Winkler - IFAC-PapersOnLine, 2020 - Elsevier
This contribution presents a backstepping-based state feedback design for the tracking
control of a two-phase Stefan problem which is encountered in the Vertical Gradient Freeze …

Backstepping-based tracking control of the vertical gradient freeze crystal growth process

S Ecklebe, N Gehring - IFAC-PapersOnLine, 2023 - Elsevier
The vertical gradient freeze crystal growth process is the main technique for the production
of high quality compound semiconductors that are vital for today's electronic applications. A …