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Zhang, Y. (author), de Visser, C.C. (author), Chu, Q. P. (author)Safe flight-envelope prediction is essential for preventing aircraft loss of control after the occurrence of sudden structural damage and aerodynamic failures. Considering the unpredictable nature of such failures, many challenges remain in the process of implementing such a prediction system. In this paper, an approach to online safe flight...journal article 2018
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van der Sman, E.S. (author), Smeur, E.J.J. (author), Remes, B.D.W. (author), de Wagter, C. (author), Chu, Q. P. (author)Maintaining stable flight during high turbulence intensities is challenging for fixed-wing micro air vehicles (MAV). Two methods are proposed <br/>to improve the disturbance rejection performance of the MAV: incremental nonlinear dynamic inversion (INDI) control and phaseadvanced pitch probes. INDI uses the angular acceleration measurements to...conference paper 2017
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Ho, H.W. (author), de Croon, G.C.H.E. (author), Chu, Q. P. (author)Monocular vision is increasingly used in micro air vehicles for navigation. In particular, optical flow, inspired by flying insects, is used to perceive vehicle movement with respect to the surroundings or sense changes in the environment. However, optical flow does not directly provide us the distance to an object or velocity, but the ratio...journal article 2017
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Huang, Y. (author), Pool, D.M. (author), Stroosma, O. (author), Chu, Q. P. (author)Hydraulic driven manipulators face serious control problems due to the nonlinear system dynamics and model and parametric uncertainties of hydraulic actuators. In this paper, a novel sensor-based Incremental Nonlinear Dynamic Inversion controller is applied to force tracking control of hydraulic actuators of a hexapod flight simulator motion...conference paper 2017
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Miletović, I. (author), Pool, D.M. (author), Stroosma, O. (author), van Paassen, M.M. (author), Chu, Q. P. (author)Accurate and reliable estimation of the kinematic state of a six degrees-of-freedom Stewart platform is a problem of interest in various engineering disciplines. Particularly so in the area of flight simulation, where the Stewart platform is in widespread use for the generation of motion similar to that experienced in actual flight. Accurate...journal article 2017
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Zhou, Y. (author), van Kampen, E. (author), Chu, Q. P. (author)This paper presents an adaptive control technique to deal with spacecraft attitude tracking and disturbance rejection problems in the presence of model uncertainties. Approximate dynamic programming has been proposed to solve adaptive, optimal control problems without using accurate systems models. Within this category, linear approximate...conference paper 2017
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- Wang, X. (author), van Kampen, E. (author), Chu, Q. P. (author) conference paper 2017
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- Zhou, Y. (author), van Kampen, E. (author), Chu, Q. P. (author) contribution to periodical 2017
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- Lu, P. (author), van Kampen, E. (author), de Visser, C.C. (author), Chu, Q. P. (author) journal article 2017
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Shuang, Weifang (author), Zhang, S. (author), Wu, Xue (author), van Kampen, E. (author), Chu, Q. P. (author)<br/>conference paper 2017
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Lu, P. (author), van Kampen, E. (author), Chu, Q. P. (author)<br/>conference paper 2017
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Chen, Liangbiao (author), Zhou, Jiang (author), Chu, Hsing-wei (author), Zhang, Kouchi (author), Fan, Xuejun (author)While moisture diffusion in microelectronic device and packaging has been studied for decades, the problems involving complex nonlinear moisture diffusion in multi-material assembly have not been fully studied. This paper has developed a general nonlinear diffusion model by adopting water activity, a continuous state variable, as the field...journal article 2017
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Chu, L. (author), Korobko, A.V. (author), Cao, A. (author), Sachdeva, S. (author), Liu, Z. (author), de Smet, L.C.P.M. (author), Sudhölter, Ernst J. R. (author), Picken, S.J. (author), Besseling, N.A.M. (author)The Hamaker constant between graphene oxide and silica, which quantifies the strength of van der Waals forces is determined, by mimicking a “vacuum spacer” in an atomic force microscopyforce study. It is demonstrated that, a 2D spacer is expected to yield an accurately defined separation, owing to the high atom density and strength in planar...journal article 2017
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- Zhang, Y. (author), de Visser, C.C. (author), Chu, Q. P. (author) conference paper 2016
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- Zhang, Y. (author), de Visser, C.C. (author), Chu, Q. P. (author) conference paper 2016
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Zhou, Y. (author), van Kampen, E. (author), Chu, Q. P. (author)Flapping-wing MAVs represent an attractive alternative to conventional designs with rotary wings, since they promise a much higher efficiency in forward flight. However, further insight into the flapping-wing aerodynamics is still needed to get closer to the flight performance observed in natural fliers. Here we present the first step necessary...conference paper 2016
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Ho, H.W. (author), de Croon, G.C.H.E. (author), Chu, Q. P. (author)Monocular vision is increasingly used in Micro Air Vehicles for navigation. In particular, optical flow, inspired by flying insects, is used to perceive vehicles’ movement with respect to the surroundings or sense changes in the environment. However, optical flow does not directly provide us the distance to an object or velocity, but the ratio...conference paper 2016
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Helsen, R (author), van Kampen, E. (author), de Visser, C.C. (author), Chu, Q. P. (author)In this research, the concept of posing the flight envelope as a reachable set is ex- plored further and it is investigated whether the "Distance Fields Over Grids (DFOG)" method for reachability computations is a viable method for envelope determination. The DFOG method approximates the reachable set of a dynamic system by solving a number of...journal article 2016
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Lu, P. (author), van Kampen, E. (author), de Visser, C.C. (author), Chu, Q. P. (author)The design of unknown-input decoupled observers and lters requires the assumption of an existence condition in the literature.This paper addresses an unknown input ltering problem where the existence condition is not satised. Instead of designing a traditional unknown input decoupled lter, a Double-Model Adaptive Estimation approach is extended...journal article 2016
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Smeur, E.J.J. (author), Chu, Q. P. (author), de Croon, G.C.H.E. (author)Incremental nonlinear dynamic inversion is a sensor-based control approach that promises to provide high-performance nonlinear control without requiring a detailed model of the controlled vehicle. In the context of attitude control of micro air vehicles, incremental nonlinear dynamic inversion only uses a control effectiveness model and uses...journal article 2016