Searched for: subject%3A%22proportional%22
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van Dunné, Jippe (author)
High-voltage circuit breakers protect and control the electrical power grid, making their reliability of the essence. Robustly assessing the technical `health' of every circuit breaker in operation is key for an optimal maintenance strategy and safety measures, but is traditionally not performed in a data-driven, statistical fashion. The goal is...
master thesis 2023
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Slebioda, Marek (author)
Offshore wind turbines have seen a significant increase in size over the past decades. A critical consequence of this increase in size is a substantial increase in the torque transferred from the wind turbine rotor. This leads to the necessity of larger and heavier drivetrains to adhere to structural failure requirements and subsequently to...
master thesis 2023
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Slebioda, Marek (author), Giele, R.J.P. (author), Langelaar, Matthijs (author)
This paper presents a density based topology optimization method for infinite fatigue life constraints of non-proportional load cases, with a specific focus on parts with cyclic symmetry. Considering non-proportional loads in topology optimization significantly broadens the types of design problems that can be handled. The method estimates...
journal article 2023
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Shi, Baocun (author), Liu, Quan (author), Gao, Y. (author), Wu, Jiantao (author), Chen, Jingya (author)
The occurrence of cohesive/adhesive hybrid failure at the bitumen-aggregate interface is widely acknowledged, however, the quantitative evaluation of the cohesion/adhesion proportion is relatively weak. This study explored cohesive/adhesive hybrid failure and provided a quantitative analysis of the proportion between cohesion and adhesion....
journal article 2023
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Alberto, Rosa (author), van Helden, G. (author), Bakker, Arthur (author)
Embodied learning technologies have shown efficacy in laboratories with ideal supportive conditions, but their effectiveness in classroom with “real-world” constraints is yet understudied. Inspired by the innovation implementation framework, we compare the classroom-situated engagements of two student pairs and their teachers with the action...
journal article 2022
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Wiedenhöver, Laura (author)
This study aims to reflect on the origin of Dr. H.P Berlage’s architectonic principles and systems of measurement to uncover how he designed and why he voiced certain thoughts on mass production. This is done by analyzing his architectural background and writings, namely Normalisatie in Woningbouw and Thoughts on Style. One chapter is devoted to...
student report 2021
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Hu, R. (author), Ferrari, Riccardo M.G. (author), Chen, Z. (author), Cheng, Yuqiang (author), Zhu, Xiaobin (author), Cui, Xing (author), Wu, Jianjun (author)
This paper proposes a controller design for the electric pump of a deep-throttling rocket engine. The nonlinearity of the system is taken into consideration by analyzing the gap metric. Then, proportional-integral-derivative controller and gain-scheduling linear quadratic regulator are designed. Analyzing the amplitude- and phase-frequency...
journal article 2021
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Naveh, Iman M. Hosseini (author), Rakhshani, E. (author), Mehrjerdi, Hasan (author), Elsaharty, Mohamed A. (author)
This paper presents a comprehensive evaluation of the effect of quasi oppositional - based learning method utilization in output tracking control through a swarm-based multivariable Proportional-Integral-Derivative (SMPID) controller, which is tuned by a novel performance index based on the step response characteristics in multi-input multi...
journal article 2021
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Pari, M. (author)
Sequentially Linear Analysis (SLA) is a proven robust alternative to incremental-iterative solution methods in nonlinear finite element analysis (NLFEA) of quasi-brittle specimen. The core of the method is in its departure from a load, displacement or arc-length driven incremental approach (aided by internal iterations to establish equilibrium)...
doctoral thesis 2020
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van Lieshout, P.S. (author)
Structural geometry and stochastic loads such as swell and wind seas can typically induce multiaxial stress states in welded details of marine structures. It is known that such complex time varying stress states determine the fatigue resistance of welded steel joints. Therefore, it is of importance to account for them in fatigue lifetime...
doctoral thesis 2020
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Pokojski, Jerzy (author), Gil, MacIej (author), Newnes, Linda (author), Stjepandić, Josip (author), Wognum, Nel (author)
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conference paper 2020
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Pari, M. (author), Hendriks, M.A.N. (author), Rots, J.G. (author)
Sequentially linear solution procedures provide a robust alternative to their traditional incremental-iterative counterparts for finite element simulation of quasi-brittle materials. Sequentially linear analysis (SLA), one such non-incremental (total) approach, has been extended to non-proportional loading situations in the past few years....
review 2020
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Nasir, Mesay (author)
The agent - based modeling of freight transport that captures both the variety of actors and their complex decisions has not made as much progress as in passenger transport. Efforts towards agent-based models must include firms. However, the synthesis of a firm population in the context of urban freight transport has gotten little attention in...
master thesis 2019
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Oudkerk, Thijs (author)
Unplanned maintenance is a costly factor in aircraft operations. Predictive Maintenance aims at reducing the surprise effect of unplanned maintenance and thereby its associated cost. A variety of statistical models are used to estimate the remaining life, as well as sensors to gauge component condition. The application to statistical models of...
master thesis 2019
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Danks, Brigitte (author)
The aim of this thesis was to objectively and quantitatively assess the accuracy and robustness of two-dimensional sequentially linear analysis (SLA) in comparison to nonlinear finite element analysis (NLFEA), for a range of experiments of reinforced concrete structures with proportional and non-proportional loading schemes. Non-proportional...
master thesis 2019
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Fonod, R. (author), Shima, Tal (author)
A novel wingman-based estimation and guidance concept is proposed for a sensorless pursuer. The pursuer is guided towards a maneuvering aerial target using proportional navigation (PN) guidance law. The wingman is assumed to acquire bearings-only measurements of the target and to accurately track the wingman-pursuer relative position. The...
journal article 2019
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Thijssens, Olivier (author)
Global and local aviation traffic is growing while economic and performance pressures on the industry are increasing. As a consequence, airlines try to maximise their fleet utilization. Airline operators and Maintenance, Repair and Overhaul (MRO) providers therefore require as much insight as possible in factors affecting component reliability...
master thesis 2019
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Does, Luc (author)
In this thesis, the design and implementation of an improved current controller for grid-tied converters is discussed. Using this improved current controller, a power factor correction test platform achieves practically zero AC and DC error in steady-state. The power factor corrector accomplishes this by utilizing the parallel combination of a...
master thesis 2019
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Gunda, Arun (author), Özkayar, G. (author), Tichem, M. (author), Ghatkesar, M.K. (author)
Microvalves are important flow-control components in many standalone and integrated microfluidic circuits. Although there is a large body of work regarding<br/>microvalves, there is still a need for an easyto-fabricate, small-footprint, low-power device that can control both liquids and gases at moderate pressures. This paper details the...
conference paper 2019
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Pari, M. (author), Hendriks, M.A.N. (author), Rots, J.G. (author)
Sequentially linear analysis (SLA), a non-incremental-iterative approach towards finite element simulation of quasi-brittle materials, is based on sequentially identifying a critical integration point in the model, to reduce its strength and stiffness, and the associated critical load multiplier (λ <sub>crit</sub> ), to scale the linear...
journal article 2019
Searched for: subject%3A%22proportional%22
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