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Beumer, Mees (author)The mini optical ground station (MISO), on top of the Aerospace Engineering faculty, serves the purpose of demonstrating Free Space Optical Communication technology. A downlink from low earth orbit imposes pointing requirements beyond what can be achieved by the telescope mount. A Fine Pointing Assembly (FPA), the topic of this thesis, aims to...master thesis 2024
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Tacx, Paul (author), Habraken, Roel (author), Witvoet, Gert (author), Heertjes, Marcel (author), Oomen, T.A.E. (author)Next-generation deformable mirrors are envisaged to exhibit low-frequency flexible dynamics and to contain a large number of spatially distributed actuators due to increasingly stringent performance requirements. The increasingly complex system characteristics necessitate identifying the flexible dynamic behavior for design validation and...journal article 2024
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Aarnoudse, Leontine (author), Cox, Kevin (author), Koekebakker, Sjirk (author), Oomen, T.A.E. (author)The increasing complexity of next-generation mechatronic systems leads to different types of periodic disturbances, which require dedicated repetitive control strategies to attenuate. The aim of this paper is to develop a new repetitive control strategy to completely attenuate a periodic disturbance and a user-defined number of relevant...journal article 2024
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Berselli, Giovanni (author), Catalano, Manuel (author), Frecker, Mary (author), Herder, J.L. (author), Hopkins, Jonathan B. (author)Compliant mechanisms (CMs), along with soft robotics devices formed therewith, may be defined as engineering systems achieving force and motion transmission via the deflection of flexible members. CMs have increasingly gained a strong foothold in the scientific arena owing to their hinge-less nature, shock resistance, potential single-piece...contribution to periodical 2024
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Brinkman, Anne (author)Background: The lack of access to electric powered wheelchairs for disabled people in low- and middle-income countries, that suit their rural environments, still remains an issue. Current available electric powered wheelchairs that do adapt to these rural environments are expensive and require complex control algorithms.<br/>Objective: The aim...master thesis 2023
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Ellis, Michael D. (author), Gurari, Netta (author), Gerritsen, Ninette T.A. (author), Lee, Sabrina M. (author), Wang, Amy (author), Dewald, J.P.A. (author)Muscle tissue is prone to changes in composition and architecture following stroke. Changes in muscle tissue of the extremities are thought to increase resistance to muscle elongation or joint torque under passive conditions. These effects likely compound neuromuscular impairments, exacerbating movement function. Unfortunately, conventional...journal article 2023
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Buitenhuis, R. N. (author), Saikumar, N. (author), Hassan HosseinNia, S. (author)The ever-increasing industry desire for improved performance makes linear controller design run into fundamental limitations. Nonlinear control methods such as Reset Control (RC) are needed to overcome these. RC is a promising candidate since, unlike other nonlinear methods, it easily integrates into the industry-preferred PID design...journal article 2023
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de Bruin, P. E. (author), Kaczmarek, M.B. (author), Kok, M. (author), Hassan HosseinNia, S. (author)This study evaluates three recursive Bayesian input and state estimation algorithms, as introduced in the field of Structural Health Monitoring, for estimating modal contributions for high-tech compliant mechanisms. The aim of estimating modal contributions is the use for active vibration control. High-tech compliant motion stages allow for...journal article 2023
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van Haren, M. (author), Blanken, L. (author), Oomen, T.A.E. (author)The increasing demands for motion control result in a situation where Linear Parameter-Varying (LPV) dynamics have to be taken into account. Inverse-model feedforward control for LPV motion systems is challenging, since the inverse of an LPV system is often dynamically dependent on the scheduling sequence. The aim of this paper is to develop...journal article 2023
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van Meer, Max (author), Deniz, Emre (author), Witvoet, Gert (author), Oomen, T.A.E. (author)Sensors in high-precision mechatronic systems require accurate calibration, which is achieved using test beds that, in turn, require even more accurate calibration. The aim of this paper is to develop a cascaded calibration method for position sensors of mechatronic systems while taking into account the variance of the calibration model of...journal article 2023
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Aarnoudse, Leontine (author), Pavlov, Alexey (author), Oomen, T.A.E. (author)Iterative learning control (ILC) involves a trade-off between perfect, fast attenuation of iteration-invariant disturbances and amplification of iteration-varying ones. The aim of this paper is to develop a nonlinear ILC framework that achieves fast convergence, robustness, and low converged error values in ILC. To this end, the method...journal article 2023
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Tacx, Paul (author), Teurlings, Matthijs (author), Habraken, Roel (author), Witvoet, Gert (author), Heertjes, Marcel (author), Oomen, T.A.E. (author)Flexible dynamics in motion systems lead to inherent spatio-temporal system behavior. The aim of this paper is to develop an unified approach for the identification of modal models of spatio-temporal overactuated systems. The approach exploits the modal modeling framework and the overactuated setting to enhance the estimation of the spatial...journal article 2023
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Buskes, V. F. (author), Kaczmarek, M.B. (author), Veenstra, J. C. (author), Coulais, C. (author), Hassan HosseinNia, S. (author)Metamaterials are artificial structures with properties that are rare or non-existent in nature. These properties are created by the geometry and interconnection of the metamaterial unit cells. In active metamaterials, sensors and actuators are embedded in each unit cell to achieve greater design freedom and tunability of properties after the...conference paper 2023
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Koene, Robbert (author), Meijaard, J.P. (author), van de Ruit, M.L. (author), Mugge, W. (author), van der Wijk, V. (author)Humans vary the stiffness in their joints depending on tasks and circumstances. For posture control a high joint stiffness is required to withstand perturbations, whereas for force control a low joint stiffness is required. To investigate how humans vary their joint stiffness precisely for moving an arm, a wearable device is needed that can...conference paper 2023
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Ravichandran, Rahul (author)CubeSats have risen in popularity since its first launch in the year 2003. The low mass, lower launch cost, lower development cost, possibility for piggyback with larger satellites and lower development time involved compared to larger satellites have opened them to be commercialised by private companies. In contrast to being used for...master thesis 2022
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Koene, Robbert (author)The compliance (stiffness) of a human arm varies, depending on the task at hand. Some precise tasks require high stiffness, while others need a level of flexibility to deal with unknown disturbances. To describe this human behaviour a portable device is needed to give small force perturbations (input) while the resulting reaction of the arm ...master thesis 2022
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van Haren, Max (author), Poot, Maurice (author), Portegies, Jim (author), Oomen, T.A.E. (author)Mechatronic systems have increasingly high performance requirements for motion control. The low-frequency contribution of the flexible dynamics, i.e., the compliance, should be compensated for by means of snap feedforward to achieve high accuracy. Position-dependent compliance, which often occurs in motion systems, requires the snap feedforward...conference paper 2022
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Lv, Maolong (author), Li, Yongming (author), Pan, W. (author), Baldi, S. (author)This article proposes a fuzzy adaptive design solving the finite-time constrained tracking for hypersonic flight vehicles (HFVs). Actuator dynamics and asymmetric time-varying constraints are considered when solving this problem. The main features of the proposed design lie in 1) introducing a novel piecewise but differentiable switching...journal article 2022
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Li, Peng (author), Liu, Di (author), Baldi, S. (author)Adaptive integral sliding mode control (AISMC) is an extension of adaptive sliding mode control which is a way to ensure sliding motion while handling system uncertainties. However, conventional AISMC formulations require to different extent a priori knowledge of the system uncertainty: either the upper bound of the uncertainty or of its time...journal article 2022
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Tacx, Paul (author), Oomen, T.A.E. (author)Next-generation motion stages are envisaged to be lightweight to meet stringent demands regarding accuracy and throughput. The lightweight stage design implies flexible dynamical behavior, which is foreseen to be severely excited due to increasing acceleration forces. The aim of this paper is to exploit additional actuators and sensors to...journal article 2022