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Lu, P. (author), van Kampen, E. (author), de Visser, C.C. (author), Chu, Q. P. (author)This paper deals with aircraft trajectory control in the presence of model uncertainties and actuator faults. Existing approaches, such as adaptive backstepping and nonlinear dynamic inversion with online model identi_cation, can be applied. However, since there are a number of unknown aerodynamic derivatives, the tuning of parameter update law...journal article 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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- Lu, P. (author), van Kampen, E. (author), de Visser, C.C. (author), Chu, Q. P. (author) journal article 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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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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- 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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- Lu, P. (author), van Eykeren, L. (author), van Kampen, E. (author), de Visser, C.C. (author), Chu, Q. P. (author) journal article 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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Lu, Hongzhong (author), Liu, X. (author), Huang, Mingzhi (author), Xia, Jianye (author), Chu, Ju (author), Zhuang, Yingping (author), Zhang, Siliang (author), Noorman, H.J. (author)Background: Aspergillus niger is widely used for enzyme production and achievement of high enzyme production depends on the comprehensive understanding of cell's metabolic regulation mechanisms. Results: In this paper, we investigate the metabolic differences and regulation mechanisms between a high glucoamylase-producing strain A. niger...journal article 2015
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Chu, J. (author)Fractionated spacecraft deploy satellites' functionalities, such as computation, communication, data storage, payload operations and even power generation, onboard several modules that share those functionalities through a wireless network. With the advent of such an innovative space architecture, non-traditional attributes such as flexibility,...doctoral thesis 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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Chu, J. (author), Guo, J. (author), Gill, E.K.A. (author)This paper presents closed-form solutions for the problem of long-term satellite relative motion in the presence of J2 perturbations, and introduces a design methodology for long-term passive distance-bounded relative motion. There are two key ingredients of closed-form solutions.One is the model of relative motion; the other is the Hamiltonian...journal article 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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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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Jia, L. (author), Chen, X (author), Chu, X (author), Pouwelse, J.A. (author), Epema, D.H.J. (author)Many private BitTorrent communities employ Sharing Ratio Enforcement<br/>(SRE) schemes to incentivize users to contribute. It has been demonstrated<br/>that users in private communities are highly dedicated and that they seed much<br/>longer than users in communities where SRE is not employed. While most pre-<br/>vious studies focus on showing...journal article 2014