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Hueber, Paul (author), Tang, Guangzhi (author), Sifalakis, Manolis (author), Liaw, Hua Peng (author), Micheli, A. (author), Tömen, N. (author), Liu, Y. (author)Designing processors for implantable closed-loop neuromodulation systems presents a formidable challenge owing to the constrained operational environment, which requires low latency and high energy efficacy. Previous benchmarks have provided limited insights into power consumption and latency. However, this study introduces algorithmic...journal article 2024
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Liu, Y. (author), Pan, W. (author)Machine learning can be effectively applied in control loops to make optimal control decisions robustly. There is increasing interest in using spiking neural networks (SNNs) as the apparatus for machine learning in control engineering because SNNs can potentially offer high energy efficiency, and new SNN-enabling neuromorphic hardware is being...journal article 2023
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Liu, Y. (author), Xu, M. (author), Portela, L. (author), Garbin, V. (author)Emulsions stabilized by nanoparticles, known as Pickering emulsions, exhibit remarkable stability, which enables applications ranging from encapsulation, to advanced materials, to chemical conversion. The layer of nanoparticles at the interface of Pickering droplets is a semi-permeable barrier between the two liquid phases, which can affect the...journal article 2023
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Mulders, S.P. (author), Liu, Y. (author), Spagnolo, Fabio (author), Christensen, P.B. (author), van Wingerden, J.W. (author)Modern industrial wind turbine controllers for partial-load region control are becoming increasingly complex by progressively relying on modeled aerodynamic characteristics. These advanced turbine controllers generally consist of a combined wind speed estimator and tracking controller, allowing for a granular trade-off between energy capture...journal article 2023
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Feng, Z. (author), Ferrari, Riccardo M.G. (author), van Wingerden, J.W. (author), Liu, Y. (author)Wind turbines may experience local weather perturbation, which is not taken into account by the commonly-used wind turbine simulation packages. Without this information, it is extremely challenging to evaluate the controller performance with regard to the effect of the variation of local atmospheric conditions. On the other side, it is too...conference paper 2023
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Pamososuryo, A.K. (author), Liu, Y. (author), Gybel Hovgaard, Tobias (author), Ferrari, Riccardo M.G. (author), van Wingerden, J.W. (author)Economic model predictive control (EMPC) has received increasing attention in the wind energy community due to its ability to trade-off economic objectives with ease. However, for wind turbine applications, inherent nonlinearities, such as from aerodynamics, pose difficulties in attaining a convex optimal control problem (OCP), by which real...journal article 2023
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Wei, Xiaoguang (author), Liu, Y. (author), Shi, Jian (author), Gao, Shibin (author), Li, Xingpeng (author), Han, Zhu (author)This article offers a novel perspective on identifying the critical branches under load redistribution (LR) attacks. Compared to the existing literature that is largely disruption-driven and based on dc state estimation, we propose to address the threat from LR attacks on a more fundamental level by modeling and analyzing the circulation of...journal article 2023
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Liu, Y. (author), Brandetti, L. (author), Mulders, S.P. (author)The combined wind speed estimator and tip speed ratio (WSE-TSR) tracking control scheme is widely used to regulate power production for large-scale modern wind turbines. Although very effective, such an advanced control scheme, based on the prior model information, is highly dependent on external measurements. For partial-load region control,...journal article 2023
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Mulders, S.P. (author), Brandetti, L. (author), Spagnolo, F. (author), Liu, Y. (author), Christensen, P.B. (author), van Wingerden, J.W. (author)Wind turbine partial-load controllers have evolved from simple static nonlinear function implementations to more advanced dynamic controller structures. Such dynamic control schemes have the potential to improve power production performance in realistic environmental conditions and allow for a more granular trade-off between loads and energy...conference paper 2023
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Stavenga, T. (author), Khan, S. A. (author), Liu, Y. (author), Krogstrup, P. (author), DiCarlo, L. (author)Quantum hardware based on circuit quantum electrodynamics makes extensive use of airbridges to suppress unwanted modes of wave propagation in coplanar-waveguide transmission lines. Airbridges also provide an interconnect enabling transmission lines to cross. Traditional airbridge fabrication produces a curved profile by reflowing resist at...journal article 2023
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Arcondoulis, E.J.G. (author), Liu, Y. (author), Ragni, D. (author), Avallone, F. (author), Rubio Carpio, A. (author), Sedaghatizadeh, N. (author), Yang, Y. (author), Li, Z. (author)Vortex shedding in the wake of a cylinder in uniform flow can be suppressed via the application of a porous coating; however, the suppression mechanism is not fully understood. The internal flow field of a porous coated cylinder (PCC) can provide a deeper understanding of how the flow within the porous medium affects the wake development. A...journal article 2023
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Liu, Y. (author), Xie, H. (author), Presekal, A. (author), Stefanov, Alexandru (author), Palensky, P. (author)Synthetic networks aim at generating realistic projections of real-world networks while concealing the actual system information. This paper proposes a scalable and effective approach based on graph neural networks (GNN) to generate synthetic topologies of Cyber-Physical power Systems (CPS) with realistic network feature distribution. In order...journal article 2023
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Papadonikolaki, E. (author), Liu, Y. (author), Maritshane, Kirk (author), Chan, P.W.C. (author)The digital transformation in project management is causing disruption on how the organizations recognize and value the skills and expertise of the new data-savvy talents in organization’s decision-making processes for improved project delivery. Existing research on digital transformation in projects has mainly focused on what technologies can...conference paper 2023
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Unscented Kalman filter-based blade-effective wind speed estimation for a vertical-axis wind turbineBrandetti, L. (author), Liu, Y. (author), Pamososuryo, A.K. (author), Mulders, S.P. (author), Watson, S.J. (author), van Wingerden, J.W. (author)On-shore horizontal-axis wind turbines (HAWTs) provide a cost-effective solution for low carbon electricity generation. However, public acceptance is still a problem. A possible alternative to a HAWT is a vertical-axis wind turbine (VAWT), which is more visually appealing and less noisy. Furthermore, the inherent omni-directionality of VAWTs...journal article 2023
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Gonzalez Silva, J. (author), Liu, Y. (author), Ferrari, Riccardo M.G. (author), van Wingerden, J.W. (author)The knowledge of the Effective wind speed (EWS) allows the designing of wind turbine controllers that regulate power production and reduce loads on turbine components. Traditional single-point measurements are known to suffer from high noise and poor correlation with the EWS. As an alternative to overcome these problems, EWS estimators can be...journal article 2023
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Wang, Jinpeng (author), Zhang, Shang (author), Fenn, Peter (author), Luo, Xiaowei (author), Liu, Y. (author), Zhao, Lilin (author)Previous studies revealed that Building Information Modeling (BIM) has the potential to reduce project uncertainties, design errors, change orders, and delays, which might facilitate achieving effective dispute management in the construction industry. However, research into the adoption of BIM to holistically enhance effective dispute...review 2023
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Brandetti, L. (author), Mulders, S.P. (author), Liu, Y. (author), Watson, S.J. (author), van Wingerden, J.W. (author)The combined wind speed estimator and tip-speed ratio (WSE–TSR) tracking wind turbine control scheme has seen recent and increased traction from the wind industry. The modern control scheme provides a flexible trade-off between power and load objectives. On the other hand, the Kω2 controller is often used based on its simplicity and steady-state...journal article 2023
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Rattay, Sonja (author), Collins, Robert (author), Surana, Aditi (author), Lee, Youngsil (author), Liu, Y. (author), Mauri, Andrea (author), Urquhart, Lachlan D (author), Vines, John (author), Wilson, Cara (author), Pschetz, Larissa (author), Rozendaal, M.C. (author), Shklovski, Irina (author)Sensor networks are increasingly commonplace in visions of smart cities and future healthcare systems, promising greater efficiency and increased wellbeing. However, the design of these technologies remains focused on specific users and fragmented by context, overlooking the diversity of needs, wants and values present when technologies, people,...conference paper 2023
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Gao, Shibin (author), He, Zonglun (author), Wei, Xiaoguang (author), Liu, Y. (author), Huang, Tao (author), Lei, Jieyu (author)A topology attack, as a special class of false data injection attacks, tampers with topology information of a system to mislead the decision of the control center. This article conducts an in-depth study on topology attacks that aim to interfere with the judgment in topology information and pose potential damage by tampering with measurement...journal article 2022
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Pamososuryo, A.K. (author), Liu, Y. (author), Hovgaard, T. G. (author), Ferrari, Riccardo M.G. (author), van Wingerden, J.W. (author)The wind turbine side-side tower motion is known to be lightly damped. One viable active damping solution is realized by deploying individual pitch control (IPC) such that counteracting blade forces are created to alleviate the tower fatigue loading caused by this motion. Existing IPC methods for side-side tower damping in the literature,...journal article 2022