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Tol, Maria C.J.M. (author), Willigenburg, Nienke W. (author), Willems, Hanna C. (author), Gosens, Taco (author), Heetveld, Martin J. (author), Eggen, B. (author), Kormos, M. (author), van der Pas, Stéphanie L. (author), van der Vaart, A.W. (author)
Importance: Hip fractures in older adults are serious injuries that result in disability, higher rates of illness and death, and a substantial strain on health care resources. High-quality evidence to improve hip fracture care regarding the surgical approach of hemiarthroplasty is lacking. Objective: To compare 6-month outcomes of the...
journal article 2024
document
Tol, Maria C.J.M. (author), Willigenburg, Nienke W. (author), Willems, Hanna C. (author), Gosens, Taco (author), Rasker, Ariena (author), Heetveld, Martin J. (author), Eggen, B. (author), Kormos, M. (author), van der Vaart, A.W. (author)
Background and purpose — The posterolateral and direct lateral surgical approach are the 2 most common surgical approaches for performing a hemiarthroplasty in patients with a hip fracture. It is unknown which surgical approach is preferable in terms of (cost-)effectiveness and quality of life. Methods and analysis — We designed a multicenter...
journal article 2022
document
Tol, H.J. (author), Kotsonis, M. (author), de Visser, C.C. (author)
This paper investigates the use of point wall pressure measurements for output feedback control of Tollmien–Schlichtingwaves in Falkner–Skan boundary layers.Anewapproach is presented for input–outputmodeling of the linear dynamics of the fluid system and the integration withH2∕Linear Quadratic Gaussian reduced-order control design. The pressure...
journal article 2019
document
Casacuberta Puig, J. (author), Groot, K.J. (author), Tol, H.J. (author), Hickel, S. (author)
Selective Frequency Damping (SFD) is a popular method for the computation of globally unstable steady-state solutions in fluid dynamics. The approach has two model parameters whose selection is generally unclear. In this article, a detailed analysis of the influence of these parameters is presented, answering several open questions with...
journal article 2018
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Tol, H.J. (author)
Dynamical systems theory can significantly contribute to the understanding and control of fluid flows. Fluid dynamical systems are governed by the Navier-Stokes equations, which are continuous in both time and space, resulting in a state space of infinite dimension. To incorporate tools from systems theory it has become common practise to...
doctoral thesis 2018
document
Tol, H.J. (author), Kotsonis, M. (author), de Visser, C.C. (author), Bamieh, B. (author)
A new framework is presented for estimation and control of instabilities in wall-bounded shear flows described by the linearised Navier-Stokes equations. The control design considers the use of localised actuators/sensors to account for convective instabilities in an optimal control framework. External sources of disturbances are assumed to...
journal article 2017
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Tol, H.J. (author), de Visser, C.C. (author), Sun, LG (author), van Kampen, E. (author), Chu, Q. P. (author)
In this paper, a new modular adaptive control system is presented to compensate for aerodynamic uncertainties in high-performance flight control systems. This approach combines nonlinear dynamic inversion with multivariate spline-based adaptive control allocation. A new real-time identification routine for multivariate splines is presented to...
journal article 2016
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Tol, H.J. (author), de Visser, C.C. (author), Kotsonis, M. (author)
This paper presents a study on control of fluid flows using multivariate spline reduced order models. A new approach is presented for model reduction of the incompressible Navier-Stokes equations using multivariate splines defined on triangulations. State space descriptions are derived that can be used for control design. This paper considers...
conference paper 2016
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Tol, H.J. (author), de Visser, C.C. (author), Kotsonis, M. (author)
A new methodology is presented for model reduction of linear parabolic partial differential equations (PDEs) on general geometries using multivariate splines on triangulations. State-space descriptions are derived that can be used for control design. This method uses Galerkin projection with B-splines to derive a finite set of ordinary...
journal article 2016
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Tol, H.J. (author), De Visser, C.C. (author), Van Kampen, E.J. (author), Chu, Q.P. (author)
This paper presents a study on fault tolerant flight control of a high performance aircraft using multivariate splines. The controller is implemented by making use of spline model based adaptive nonlinear dynamic inversion (NDI). This method, indicated as SANDI, combines NDI control with nonlinear control allocation based on an onboard...
conference paper 2015
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Nicholls, R.J. (author), Stive, M.J.F. (author), Tol, R.S.J. (author)
The coastal zone is one of the most dynamic environments on our planet and is much affected by global change, especially sea-level rise. Coastal environments harbour valuable ecosystems, but they are also hugely important from a societal point of view. This book, which draws on the expertise of 21 leading international coastal scientists,...
book chapter 2014
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Tol, H.J. (author), De Visser, C.C. (author), Van Kampen, E. (author), Chu, Q.P. (author)
High performance flight control systems based on the nonlinear dynamic inversion (NDI) principle require highly accurate models of aircraft aerodynamics. In general, the accuracy of the internal model determines to what degree the system nonlinearities can be canceled; the more accurate the model, the better the cancellation, and with that, the...
journal article 2014
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Smits, J.G.C. (author), Bokhorst, M. (author), Brinkman, A.G. (author), Herman, P.M.J. (author), Ruardij, P. (author), Sonneveldt, H.L.A. (author), Tol, M.W.M. van der (author)
report 1997
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Van der Veen, A.J. (author), Tol, J. (author)
conference paper 1997
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Doerdjan, A. (author), Van Eerten, R. (author), Van Gestel, M. (author), Hanenberg, E. (author), Hilkhuijsen, A. (author), Kwakkelstein, J. (author), Tol, A. (author), Verhaar, M. (author), Ketelaars, I. (author), Den Ridder, P. (author), Santegoeds, S. (author), Stoffels, J. (author), Zevenbergen, J. (author), G-groep februari 1993 (author)
Document(en) uit de collectie Chemische Procestechnologie
report 1993
document
Doerdjan, A. (author), Van Eerten, R. (author), Van gestel, M. (author), Hanenberg, E. (author), Hilkhuijsen, A. (author), Kwakkelstein, J. (author), Tol, A. (author), Verhaar, M. (author), Ketelaars, I. (author), Den Ridder, P. (author), Santegoeds, S. (author), Stoffels, J. (author), Zevenbergen, J. (author)
Document uit de collectie Chemische Procestechnologie
report 1983
document
Tol, L.A.J. (author)
master thesis 1974
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Tol, L.A.J. (author)
master thesis 1974
document
Tol, L.A.J. (author)
master thesis 1974
document
Tol, L.A.J. (author)
report 1974
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