Searched for: subject%3A%22guidance%22
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Atmaca, D. (author), Pontani, Mauro (author)
This research describes a near-optimal feedback guidance, based on nonlinear orbit control, for low-thrust Earth orbit transfers. Lyapunov stability theory leads to proving that although several equilibria exist, only the desired operational conditions are associated with a stable equilibrium. This ensures quasi-global asymptotic convergence...
journal article 2024
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Mahajan, N. (author), Hegyi, A. (author), Hoogendoorn, S.P. (author), van Arem, B. (author)
Drivers initiate a discretionary lane change when they perceive an anticipated improvement in their own driving condition from moving to another lane. However, such a lane change can slow down other vehicles on the target lane, and even worse initiate a disturbance. In this work, we argue that the blocking effect triggered by individual lane...
journal article 2024
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Benmahdjoub, Mohamed (author), Thabit, Abdullah (author), Van Veelen, Marie Lise C. (author), Niessen, W.J. (author), Wolvius, Eppo B. (author), Van Walsum, Theo (author)
Augmented reality (AR) has shown potential in computer-aided surgery. It allows for the visualization of hidden anatomical structures as well as assists in navigating and locating surgical instruments at the surgical site. Various modalities (devices and/or visualizations) have been used in the literature, but few studies investigated the...
journal article 2023
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Calvert, S.C. (author), van den Burg, Bastiaan D. (author), Taale, Henk (author)
Route guidance in traffic management aims to improve traffic network performance aligned with a system optimum. However, service providers commonly offer user optimum travel advice that can negatively impact centralized route guidance. This paper quantifies and demonstrates the impact of different policy strategies for a centralized route...
conference paper 2023
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Kousa, C. (author), Lubelli, B. (author), Pottgiesser, U. (author)
Reconstruction and recovery of historic cities after destruction due to conflict or natural disasters have gained increasing relevance in the last decades. The investigation of international examples of recovery after war or natural catastrophic events can provide knowledge for improving guidance and strategies for sustainable reconstruction/...
journal article 2023
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Atmaca, D. (author), Pontani, Mauro (author)
This research proposes a near-optimal feedback guidance based on nonlinear control for low-thrust Earth orbit transfers. For the numerical simulations, two flight conditions are defined: (i) nominal conditions and (ii) nonnominal conditions that account for the orbit injection errors and the stochastic failures of the propulsion system....
conference paper 2023
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Wang, X. (author)
Unmanned Aerial Vehicles (UAVs) have been emerging as a promising but challenging platform for studying autonomous and cooperative control. This Ph.D. thesis focuses on fixed-wing UAVs which, with their more efficient aerodynamics, can ensure longer flight durations and more autonomy than multi-rotorUAVs. However, in the current state of the art...
doctoral thesis 2022
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Zhang, D. (author), Ding, Er (author), Bluyssen, P.M. (author)
Since the COVID-19 pandemic, the ventilation of school buildings has attracted considerable attention from the general public and researchers. However, guidance to assess the ventilation performance in classrooms, especially during a pandemic, is still lacking. Therefore, aiming to fill this gap, this study conducted a full-scale laboratory...
journal article 2022
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Thabit, Abdullah (author), Benmahdjoub, Mohamed (author), van Veelen, Marie Lise C. (author), Niessen, W.J. (author), Wolvius, Eppo B. (author), van Walsum, T. (author)
Purpose: In minimally invasive spring-assisted craniectomy, surgeons plan the surgery by manually locating the cranial sutures. However, this approach is prone to error. Augmented reality (AR) could be used to visualize the cranial sutures and assist in the surgery planning. The purpose of our work is to develop an AR-based system to...
journal article 2022
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Wang, X. (author), Roy, Spandan (author), Fari, S. (author), Baldi, S. (author)
The high maneuverability of fixed-wing unmanned aerial vehicles (UAVs) exposes these systems to several dynamical and parametric uncertainties, severely affecting the fidelity of modeling and causing limited guidance autonomy. This article shows enhanced autonomy via adaptation mechanisms embedded in the guidance law: a vector-field method is...
journal article 2022
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Zhang, D. (author), Ding, Er (author), Bluyssen, P.M. (author)
Several recent studies have demonstrated that ventilation plays an important role in the transmission of SARS-CoV-2 (the coronavirus that causes COVID-19) in public buildings, such as schools. However, there are no clear rules on how to assess the ventilation performance in classrooms, especially during a pandemic. Therefore, the main objective...
conference paper 2022
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Wu, Z. (author), Bhattacharya, Biswa (author), Xie, Ping (author), Zevenbergen, C. (author)
Flash Flood Guidance (FFG) is a rainfall threshold which initiates flooding in streams. It merely provides a binary output (yes or no) which has large uncertainties in forecasting. In this paper, we propose a new method by combining FFG with the Frequentist method to present the probability of flash flood occurrence based on historical...
journal article 2022
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Boekestijn, Imke (author), Azargoshasb, Samaneh (author), van Oosterom, Matthias N. (author), Slof, Leon J. (author), Dibbets-Schneider, Petra (author), Dankelman, J. (author), van Erkel, Arian R. (author), Rietbergen, Daphne D.D. (author), van Leeuwen, Fijs W.B. (author)
Purpose: Navigational strategies create a scenario whereby percutaneous needle-based interventions of the liver can be guided using both pre-interventional 3D imaging datasets and dynamic interventional ultrasound (US). To score how such technologies impact the needle placement process, we performed kinematic analysis on different user groups...
journal article 2022
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Zhou, Y. (author), Ho, H.W. (author)
Hierarchical Reinforcement Learning (HRL) provides an option to solve complex guidance and navigation problems with high-dimensional spaces, multiple objectives, and a large number of states and actions. The current HRL methods often use the same or similar reinforcement learning methods within one application so that multiple objectives can...
journal article 2022
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Geldof, Freija (author), Jong, Lynn-Jade (author), Dashtbozorg, Behdad (author), Hendriks, B.H.W. (author), Sterenborg, Henricus J.C.M. (author), Ruers, Theo J.M. (author)
Establishing adequate resection margins during colorectal cancer surgery is challenging. Currently, in up to 30% of the cases the tumor is not completely removed, which emphasizes the lack of a real-time tissue discrimination tool that can assess resection margins up to multiple millimeters in depth. Therefore, we propose to combine spectral...
conference paper 2021
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Ramzan, Muhammad Javed (author), Khan, Saif Ur Rehman (author), ur-Rehman, Inayat (author), Rehman, Muhammad Habib Ur (author), Al-Khanak, Ehab Nabiel (author)
Purpose: In recent years, data science has become a high-demand profession, thereby attracting transmuters (individuals who want to change their profession due to industry trends) to this field. The primary purpose of this paper is to guide transmuters in becoming data scientists. Design/methodology/approach: An exploratory study was conducted...
journal article 2021
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Wang, X. (author), Roy, Spandan (author), Fari, S. (author), Baldi, S. (author)
Reliable guidance of fixed-wing Unmanned Aerial Vehicles (UAVs) is challenging, as their high maneuverability exposes them to several dynamical changes and parametric uncertainties. Reliability of state-of-the-art guidance methods is often at stake, as these methods heavily rely on precise UAV course dynamics, assumed in a decoupled first...
journal article 2021
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Liu, X. (author)
Railway crossings are essential components of the railway track system that allow trains to switch from one track to another. Due to the complex wheel-rail interaction in the crossing panel, crossings are vulnerable elements of railway infrastructure and usually have short service lives. The crossing damage not only results in substantial...
doctoral thesis 2020
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Yang, Jun (author), Thomas, Arun Geo (author), Singh, Satish (author), Baldi, S. (author), Wang, X. (author)
Unmanned Aerial Vehicles (UAVs) have multi-domain applications, fixed-wing UAVs being a widely used class. Despite the ongoing research on the topics of guidance and formation control of fixed-wing UAVs, little progress is known on implementation of semi-physical validation platforms (software-in-the-loop or hardware-in-the-loop) for such...
journal article 2020
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Walch, Andreas (author), Schwarzler, M. (author), Luksch, Christan (author), Eisemann, E. (author), Gschwandtner, Theresia (author)
LightGuider is a novel guidance-based approach to interactive lighting design, which typically consists of interleaved 3D modeling operations and light transport simulations. Rather than having designers use a trial-And-error approach to match their illumination constraints and aesthetic goals, LightGuider supports the process by simulating...
journal article 2020
Searched for: subject%3A%22guidance%22
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