document

Model-free motion control of positioning stage

Zhang, X. (author)

Driven by the rise of market demand and development of technology, high-precision motion systems must meet the increasing accuracy requirement. Currently, High-precision positioning stage is widely used in many different application areas, such as hard disk drives, wafer steppers and electron and atomic force microscopes for nano-scale imaging....

master thesis 2016

document

Fast MPC Solvers for Systems with Hard Real-Time Constraints

Zhang, X. (author)

Model predictive control (MPC) is an advanced control technique that offers an elegant framework to solve a wide range of control problems (regulation, tracking, supervision, etc) and handle constraints on the plant. The control objectives and constraints are usually formulated as an optimization problem that the MPC controller has to solve ...

master thesis 2016

document

Learning Control Policies for Tooth Extraction: An Application of Programming by Demonstration

Zhang, X. (author)

: Tooth extraction is one of the most common procedures in oral surgery. However, it is complicated as well as not fully understood. Different teeth have different structures and strengths. Even teeth of the same type differ depending on ages, genders, races, and other reasons affecting its integrity. During the procedure, the properties of the...

master thesis 2016

document

A Safety and Comfort Lane Change for Sportive Highly Automated Driving Truck

Zhang, Y. (author)

The major goal of this master thesis is to improve truck safety and comfort during lane change manoeuvres. This thesis focuses on the scenario of the driver doing sports exercises inside the cabin when the vehicle is driving automatically on a highway. This topic is one of the foci of the international GlobalDrive project from Technical...

master thesis 2016

document

Design of a multi-purpose research cabin mounted upon a hexapod motion simulator

Zhang, M. (author)

Motion simulators have increasingly been applied for research purposes due to their large motion capabilities and short response time. Key applications are including vehicle simulation, experiments on control behavior in virtual environments and studies into human self-motion perception. To maintain a good dynamic capability, the known motion...

master thesis 2016

document

Repeated crack healing in MAX-phase ceramics revealed by 4D in situ synchrotron X-ray tomographic microscopy

Sloof, W.G. (author), Pei, R. (author), McDonald, S.A. (author), Fife, J.L. (author), Shen, L. (author), Boatemaa, L. (author), Farle, A.S. (author), Yan, K. (author), Zhang, X. (author), Van der Zwaag, S. (author), Lee, P.D. (author), Withers, P.J. (author)

MAX phase materials are emerging as attractive engineering materials in applications where the material is exposed to severe thermal and mechanical conditions in an oxidative environment. The Ti2AlC MAX phase possesses attractive thermomechanical properties even beyond a temperature of 1000 K. An attractive feature of this material is its...

journal article 2016

document

Cluster Expansions for Thermodynamics and Kinetics of Multicomponent Alloys

Zhang, X. (author), Sluiter, M.H.F. (author)

Cluster expansions have proven a very useful tool to model thermodynamics and kinetics of substitutional alloys in metallic, ionic, and even covalently bonded systems. Cluster expansions are usually obtained with the structure inversion method in which the energies, or other relevant property, of a set of structures are used to obtain expansion...

journal article 2015

document

Mechanical instability of monocrystalline and polycrystalline methane hydrates

Wu, J. (author), Ning, F. (author), Trinh, T.T. (author), Kjelstrup, S. (author), Vlugt, T.J.H. (author), He, J. (author), Skallerud, B.H. (author), Zhang, Z. (author)

Despite observations of massive methane release and geohazards associated with gas hydrate instability in nature, as well as ductile flow accompanying hydrate dissociation in artificial polycrystalline methane hydrates in the laboratory, the destabilising mechanisms of gas hydrates under deformation and their grain-boundary structures have not...

journal article 2015

document

Waste Glass as Partial Binder Precursor and Fine Aggregate Replacement in Alkali Activated Slag/Fly ash System

Zhang, S. (author)

Fast increasing of generation and release of undesirable pollutants by the industrialization raise concerns about the environmental consequences of waste disposal. Among these waste materials, non-recycled waste glass constitutes one of the majority wastes produced in many European countries and sets a major environmental issue. Although glass...

master thesis 2015

document

Ab initio prediction of vacancy properties in concentrated alloys: The case of fcc Cu-Ni

Zhang, X. (author), Sluiter, M.H.F. (author)

Vacancy properties in concentrated alloys continue to be of great interest because nowadays ab initio supercell simulations reach a scale where even defect properties in disordered alloys appear to be within reach. We show that vacancy properties cannot generally be extracted from supercell total energies in a consistent manner without a...

journal article 2015

document

Influence of wall proximity on flow around two tandem circular cylinders

Wang, X.K. (author), Zhang, J.-X. (author), Zhou, B. (author), Tan, S.K. (author)

journal article 2015

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Chaotic Dynamics in Smart Grid and Suppression Scheme via Generalized Fuzzy Hyperbolic Model

Sun, Q. (author), Wang, Y. (author), Yang, J. (author), Qiu, Y. (author), Zhang, H. (author)

This paper presents a method to control chaotic behavior of a typical Smart Grid based on generalized fuzzy hyperbolic model (GFHM). As more and more distributed generations (DG) are incorporated into the Smart Grid, the chaotic behavior occurs increasingly. To verify the behavior, a dynamic model which describes a power system with DG is...

journal article 2014

document

Steering controller identification and design for human-like overtaking

Zhang, Y. (author)

master thesis 2014

document

Modelling of Metal Nanoimprinting

Zhang, Y. (author)

This thesis addresses the feasibility of a new nanotechnology, direct metal nanoimprinting. The main aim of this work is to investigate, by means of computer simulations, the possibility to create reproducible patterns in a metal layer by plastically deforming it with a rigid template.

doctoral thesis 2014

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Two-dimensional moonpool resonances for interface and surface-piercing twin bodies in a two-layer fluid

Zhang, X (author), Bandyk, P. (author)

journal article 2014

document

Partial validation and verification of the Neumann-Michell theory of ship waves

Zhang, C.L. (author), Noblesse, F. (author), Wan, D.C. (author)

conference paper 2014

document

LES-based numerical analysis of surface-pressure fluctuations and unsteady thrust of a marine propeller

Tian, J. (author), Yang, H. (author), Zhang, Z. (author), Yuan, G. (author), Rao, Z. (author), Hua, H. (author)

conference paper 2014

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Analysis of heave motions of a truss spar platform semi-closed moon pool

Liu, Liqin (author), Incecik, A. (author), Zhang, Y. (author), Tang, Y. (author)

journal article 2014

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Averaging Level Control to Reduce Off-Spec Material in a Continuous Pharmaceutical Pilot Plant

Lakerveld, R. (author), Benyahia, B. (author), Heider, P.L. (author), Zhang, H. (author), Braatz, R.D. (author), Barton, P.I. (author)

The judicious use of buffering capacity is important in the development of future continuous pharmaceutical manufacturing processes. The potential benefits are investigated of using optimal-averaging level control for tanks that have buffering capacity for a section of a continuous pharmaceutical pilot plant involving two crystallizers, a...

journal article 2013

document

Photocatalytical effect of TiO2 pigments on the surface of paint films

Zhang, X. (author)

TiO2 has been widely applied as white artistic pigment since 19th century. And the photo-catalytic effect of TiO2 makes it aggressive and causes degradation on painting surface. The damage of binder by TiO2, also known as chalking, has been suggested as the main cause of the painting surface degradation and studied a lot. However, the danger to...

master thesis 2013