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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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Smeur, E.J.J. (author), de Croon, G.C.H.E. (author), Chu, Q. P. (author)Micro Aerial Vehicles (MAVs) are limited in their operation outdoors near obstacles by their ability to withstand wind gusts. Currently widespread position control methods such as Proportional Integral Derivative control do not perform well under the influence of gusts. Incremental Nonlinear Dynamic Inversion (INDI) is a sensor-based control...conference paper 2016
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- Tang, D (author), Pool, D.M. (author), Stroosma, O. (author), Chu, Q. P. (author), de Visser, C.C. (author) conference paper 2016
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- Mannucci, T. (author), van Kampen, E. (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) conference paper 2016
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- Stapel, J (author), de Visser, C.C. (author), van Kampen, E. (author), Chu, Q. P. (author) conference paper 2016
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- Mannucci, T. (author), van Kampen, E. (author), de Visser, C.C. (author), Chu, Q. P. (author) conference paper 2016
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Miletovic, I. (author), Pool, D.M. (author), Stroosma, O. (author), Chu, Q.P. (author), van Paassen, M.M. (author)The six degrees-of-freedom Stewart platform, or hexapod, is in widespread use in the flight simulation industry for the generation of motion cues that are representative of those experienced in actual flight. For closed-loop control of such motion platforms, but also to be able to objectively assess the quality of the generated simulator motion,...conference paper 2015
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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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Zhou, Y. (author), Van Kampen, E.J. (author), Chu, Q.P. (author)A self-learning adaptive flight control design for non-linear systems allows reliable and effective operation of flight vehicles in a dynamic environment. Approximate dynamic programming (ADP) provides a model-free and computationally effective process for designing adaptive linear optimal controllers. This paper presents an incremental ADP ...conference paper 2015
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Smeur, E.J.J. (author), Chu, Q.P. (author), De Croon, G.C.H.E. (author), Remes, B. (author), De Wagter, C. (author), Van der Horst, E (author)The concept of an aircraft capable of both hover as well as fast forward flight (hybrid) has recently been implemented on unmanned aerial vehicles (UAV). Hybrid UAVs combine hover capability with long range and endurance. As UAVs are often required to operate without human intervention, there is a call for autonomous guidance of hybrid UAVs....conference paper 2014
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De Croon, G.C.H.E. (author), Ho, H.W. (author), De Wagter, C. (author), Van Kampen, E. (author), Remes, B. (author), Chu, Q.P. (author)Micro Air Vehicles need to have a robust landing capability, especially when they operate outside line-of-sight. Autonomous landing requires the identification of a relatively flat landing surface that does not have too large an inclination. In this article, a vision algorithm is introduced that fits a second-order approximation to the optic...conference paper 2013
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Van Eykeren, L. (author), Chu, Q.P. (author)This paper presents a model-based fault detection algorithm for a specific fault scenario of the ADDSAFE project. The fault considered is the disconnection of a control surface from its hydraulic actuator. Detecting this type of fault as fast as possible helps to operate an aircraft more cost effective and can help to avoid an undetected...conference paper 2011
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De Weerdt, E. (author), Van Kampen, E. (author), Chu, Q.P. (author), Mulder, J.A. (author)Trajectory optimization has been a large field of research for many years. The drawback is that for non-convex, constrained problems practically all available solvers cannot guarantee that the globally optimal trajectory is found. Interval analysis based solvers however can provide this guarantee. Interval analysis has been applied to trajectory...conference paper 2011
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Falkena, W. (author), Van Oort, E.R. (author), Chu, Q.P. (author)This paper uses singular perturbation theory in order to design a backstepping control system. Earlier applications using singular perturbation theory for control of non-affine systems exist, but here the focus is shifted to uncertain systems. Dealing with uncertainties in this way could be a major benefit for certification of advanced control...conference paper 2011
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De Weerdt, E. (author), Van Oort, E.R. (author), Van Kampen, E. (author), Chu, Q.P. (author)Level set methods are used to determine the reachable set for a given time domain. In the aerospace industry level set methods are used to determine for example flight envelopes. A new level set method is presented which uses interval analysis to give guaranteed bounds on the solution. Unlike the current grid-based methods the new method does...conference paper 2011
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Van Oort, E.R. (author), Sonneveldt, L. (author), Chu, Q.P. (author), Mulder, J.A. (author)In this paper nonlinear adaptive flight control laws based on the backstepping approach are proposed which are applicable to over-actuated nonlinear systems. Instead of solving the control allocation exactly, update laws for the desired control effector signals are defined such that they converge to the optimal solution. Stability and...conference paper 2011