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🔍 hamish nicholson 📂 Engineering
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Engineering Preprint PDF DOI

Cross-Atlantic Research Agenda for Scalable Grid Architectures and Distributed Flexibility

Mads R. Almassalkhi, Dakota Hamilton, Hasan Giray Oral, Yury Dvorkin, Dennice Gayme, Bri-Mathias Hodge, Brian Vad Mathiesen, Jakob Stoustrup, Tobias Ritschel, Rune G. Junker, Shahab Tohidi, Razgar Ebrahimy, Henrik Madsen · 2026

Electric power systems are rapidly evolving into deeply digital, cyber-physical infrastructures in which large fleets of distributed energy resources must be coordinated as system-level flexibility ac…

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Engineering Preprint PDF DOI

Wildfires Quasi-Implicit Alternative-Direction Simulations using Isogeometric Finite Element Method

Juliusz Wasieleski, Tomasz S{l}uzalec, Maciej Wozniak, Marcin {L}os, Andres Medina, Paulina Sepulveda, Albert Oliver Serra, Eirik Valseth, Anna Paszynska, Maciej Paszynski · 2026

We develop a wildfire simulation model that evolves the temperature scalar field using an energy balance equation accounting for heat generation, transport, and loss. For these equations, we develop q…

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Engineering Preprint PDF DOI

Greedy Kalman-Swarm: Improving State Estimation in Robot Swarms in Harsh Environments

Phunyapa Suksomboon, Paulo Garcia · 2026

State estimation is a fundamental requirement in robotics, where the accurate determination of a robot's state is essential for stable operation despite inherent process disturbances and sensor noise.…

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Engineering Preprint PDF DOI

Bilinear controllability for the linear KdV-Schr{\"o}dinger equation

Remi Buffe (IECL, SPHINX), Alessandro Duca (SPHINX, IECL), Hugo Parada (SPHINX, IECL) · 2026

We study the controllability of a linear KdV-Schr{\"o}dinger equation on the one-dimensional torus via purely imaginary bilinear controls. Considering controls spanning a suitable finite number of Fou…

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Engineering Preprint PDF DOI

Safe and Near-Optimal Gate Control: A Case Study from the Danish West Coast

Martin Kristjansen (Aalborg University), Kim Guldstrand Larsen (Aalborg University), Marius Mikucionis (Aalborg University), Christian Schilling (Aalborg University) · 2026

Ringkoebing Fjord is an inland water basin on the Danish west coast separated from the North Sea by a set of gates used to control the amount of water entering and leaving the fjord. Currently, human …

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Engineering Preprint PDF DOI

ROFT-VINS: Robust Feature Tracking-based Visual-Inertial State Estimation for Harsh Environment

Sanghyun Park, Soohee Han · 2026

SLAM (Simultaneous Localization and Mapping) and Odometry are important systems for estimating the position of mobile devices, such as robots and cars, utilizing one or more sensors. Particularly in c…

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Engineering Preprint PDF DOI

LineMaster Pro: A Low-Cost Intelligent Line Following Robot with PID Control and Ultrasonic Obstacle Avoidance for Educational Robotics

Jeni Shahi, Abhishek Shah, A. S. M. Ahsanul Sarkar Akib · 2026

Line following robots are fundamental platforms in robotics education, yet commercially available solutions remain prohibitively expensive ($150-300$) while lacking integrated obstacle detection capab…

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Engineering Preprint PDF DOI

Efficient reformulations of ReLU deep neural networks for surrogate modelling in power system optimisation

Yogesh Pipada Sunil Kumar, S. Ali Pourmousavi, Jon A.R. Liisberg, Julian Lesmos-Vinasco · 2026

The ongoing decarbonisation of power systems is driving an increasing reliance on distributed energy resources, which introduces complex and nonlinear interactions that are difficult to capture in con…

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Engineering Preprint PDF DOI

Calibrated uncertainty quantification for prosumer flexibility aggregation in ancillary service markets

Yogesh Pipada Sunil Kumar, S. Ali Pourmousavi, Jon A.R. Liisberg, Julian Lesmos-Vinasco · 2026

Reliable forecasting of prosumer flexibility is critical for demand response aggregators participating in frequency controlled ancillary services market, where strict reliability requirements such as …

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Engineering Preprint PDF DOI

Distributionally Robust Game for Proof-of-Work Blockchain Mining Under Resource Uncertainties

Xunqiang Lan, Xiao Tang, Ruonan Zhang, Bin Li, Qinghe Du, Dusit Niyato, Zhu Han · 2026

Blockchain plays a crucial role in ensuring the security and integrity of decentralized systems, with the proof-of-work (PoW) mechanism being fundamental for achieving distributed consensus. As PoW bl…

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Engineering Preprint PDF DOI

Model-free practical PI-Lead control design by ultimate sensitivity principle

Michael Ruderman · 2025

Practical design and tuning of feedback controllers has to do often without any model of the given dynamic process. Only some general assumptions about the process, in this work type-one stable behavi…

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Engineering Preprint PDF DOI

Data-Driven Post-Event Analysis with Real-World Oscillation Data from Denmark

Youhong Chen, Debraj Bhattacharjee, Balarko Chaudhuri, Mark O Malley, Nan Qin, Adrian Pilkaer Expethit · 2025

This paper demonstrates how Extended Dynamic Mode Decomposition (EDMD), grounded in Koopman operator theory, can effectively identify the main contributor(s) to oscillations in power grids. We use PMU…

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Engineering Preprint PDF DOI

Stable Multi-Drone GNSS Tracking System for Marine Robots

Shuo Wen, Edwin Meriaux, Mariana Sosa Guzman, Zhizun Wang, Junming Shi, Gregory Dudek · 2025

Stable and accurate tracking is essential for marine robotics, yet Global Navigation Satellite System (GNSS) signals vanish immediately below the sea surface. Traditional alternatives suffer from erro…

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Engineering Preprint PDF DOI

AIA-UltraNeRF:Acoustic-Impedance-Aware Neural Radiance Field with Hash Encodings for Robotic Ultrasound Reconstruction and Localization

Shuai Zhang, Jingsong Mu, Cancan Zhao, Leiqi Tian, Zhijun Xing, Bo Ouyang, Xiang Li · 2025

Neural radiance field (NeRF) is a promising approach for reconstruction and new view synthesis. However, previous NeRF-based reconstruction methods overlook the critical role of acoustic impedance in …

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Engineering Preprint PDF DOI

Green Hydrogen under Uncertainty: Evaluating Power-to-X Strategies Using Agent-Based Simulation and Multi-Criteria Decision Framework

Frederik Wagner Madsen, Joy Dalmacio Billanes, Bo N{o}rregaard J{o}rgensen, Zheng Ma · 2025

The transition toward net-zero energy systems requires scalable and cost-effective deployment of Power-to-X technologies, particularly green hydrogen production. Despite increasing investments, a crit…

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Engineering Preprint PDF DOI

Online Specific Emitter Identification via Collision-Alleviated Signal Hash

Hongyu Wang, Wenjia Xu, Guangzuo Li, Siyuan Wan, Yaohua Sun, Jiuniu Wang, Mugen Peng · 2025

Specific Emitter Identification (SEI) has been widely studied, aiming to distinguish signals from different emitters given training samples from those emitters. However, real-world scenarios often req…

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Engineering Preprint PDF DOI

Nonlinear Sampled-data Systems--A Lifting Framework

Yutaka Yamamoto, Kaoru Yamamoto · 2025

This short note gives a new framework for dealing with nonlinear sampled-data systems. We introduce a new idea of lifting, which is well known for linear systems, but not successfully generalized to n…

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Engineering Preprint PDF DOI

Ruggedized Ultrasound Sensing in Harsh Conditions: eRTIS in the wild

Dennis Laurijssen, Wouter Jansen, Arne Aerts, Walter Daems, Jan Steckel · 2025

We present eRTIS, a rugged, embedded ultrasound sensing system for use in harsh industrial environments. The system features a broadband capacitive transducer and a 32-element MEMS microphone array ca…

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Engineering Preprint PDF DOI

A Spectral-Based Tuning Criterion for PI Controllers in IPDT Systems With Unified Tracking and Disturbance Rejection Performance

Dhamdhawach Horsuwan · 2025

This paper proposes a spectral-based tuning method for proportional-integral (PI) controllers in integrating-plus-dead-time (IPDT) systems. The design objective is to achieve unified exponential decay…

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Engineering Preprint PDF DOI

PID Tuning via Desired Step Response Curve Fitting

Senol Gulgonul · 2025

This paper presents a PID tuning method based on step response curve fitting (PID-SRCF) that utilizes L2-norm minimization for precise reference tracking and explicit transient response shaping. The a…

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