Searched for: subject:"Controllability"
(1 - 20 of 874)

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Sánchez-Arriaga, Gonzalo (author), Pastor-Rodríguez, Alejandro (author), Sanjurjo-Rivo, Manuel (author), Schmehl, R. (author)
A parallelized flight simulator for the dynamic analysis of airborne wind energy (AWE) systems for ground- and fly-generation configurations is presented. The mechanical system comprises a kite or fixed-wing drone equipped with rotors and linked to the ground by a flexible tether. The time-dependent control vector of the simulator mimics real...
journal article 2019
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Sunil, E. (author)
The current system of Air Traffic Control (ATC) relies on a centralized control architecture. At its core, this system is heavily dependent on manual intervention by human Air Traffic Controllers (ATCos) to ensure safe operations. The capacity of this system is, therefore, closely tied to the maximum workload that can be tolerated by ATCos....
doctoral thesis 2019
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Zhang, Y. (author)
Among all the contributors to fatal accidents, in-flight loss of control (LOC-I) remains one of the largest categories, as indicated by statistics of investigations into past civil aircraft accidents. In flight LOC generally refers to accidents in which the flight crew was unable to maintain control of the aircraft in flight, resulting in an...
doctoral thesis 2019
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Huang, Y. (author)
In advanced robotic applications such as robotic locomotion, vehicle and flight simulators, and material test devices, there are higher requirements on stiffness, robustness and power ability for the mechanical structure and the actuator. Hence, it is common for such applications to use parallel manipulators and hydraulic actuators, due to their...
doctoral thesis 2019
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Nazarian, G. (author)
Microprocessors are used in an expanding range of applications from small embedded system devices to supercomputers and mainframes. Moreover, embedded microprocessor based systems became essential in modern societies. Depending on the application domain, embedded systems have to satisfy different constraints. The major challenges today are cost,...
doctoral thesis 2019
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Kuiper, R.J. (author)
Remotely controlled subsea vehicles are frequently used for oil and gas applications. A potential future application requiring remote controlled vehicles is deep-sea mining. At the envisioned water depths beyond 1500m, rare minerals are accessible without deep excavation. However, the extreme hyperbaric conditions (i.e. high pressure), limited...
doctoral thesis 2019
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Lin, X. (author)
This thesis provides tools for decision support systems for perishable goods logistics. It also provides an approach for enterprises to estimate the benefit of adopting the proposed logistic systems. Perishable products are produced, transported, and consumed all over the world. Thanks to perishable goods supply chains, we can enjoy safe, fresh,...
doctoral thesis 2019
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Boersma, S. (author)
Electricity consumption is increasing on a global level. In 2017, non-renewable energy sources such as crude oil, natural gas and coal provided 76% of the required energy, while 24% came from renewable sources such as hydro, wind and solar. Non-renewable sources are finite because they do not replenish rapidly enough relative to the rate at...
doctoral thesis 2019
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Geertsma, R.D. (author)
Shipping plays a crucial role in modern society, but has to reduce its impact on the environment. The commercial availability of power electronic converters and lithium-ion batteries provides an opportunity to improve performance of ships energy systems while reducing their environmental impact. However, the degrees of freedom in control for...
doctoral thesis 2019
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Kwon, M. (author), Remoy, Hilde (author), van den Dobbelsteen, A.A.J.F. (author), Knaack, U. (author)
Personal control is one of the influential factors for user satisfaction and environmental comfort due to its physical and psychological impacts. This paper aims to identify the relationship between the degree of personal control over indoor environmental conditions and user satisfaction with thermal and visual comfort. Trying to answer the...
journal article 2019
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Alquaimi, B. (author), Rossen, W.R. (author)
Gas is used in petroleum reservoirs to displace oil for enhanced oil recovery. The microscopic displacement efficiency of gas is very good, but at the reservoir scale the process suffers from poor sweep efficiency, especially in naturally fractured reservoirs. Foam can improve the sweep. There have been considerable scientific contributions...
journal article 2019
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Zheng, Huarong (author), Wu, Jun (author), Wu, Weimin (author), Negenborn, R.R. (author)
The rapidly developing computing and communication technologies improve the autonomy of individual vehicles on the one hand and facilitate the coordination among vehicles on the other. In the context of dynamic speed management, this study considers a platoon of intelligent vehicles that are required to maintain desired inter-vehicle spaces and...
journal article 2019
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Santis, Patricio (author), Sáez, Doris (author), Cárdenas, Roberto (author), Nunez Vicencio, Alfredo (author)
PC algorithm and...
journal article 2019
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Bijl, H.J. (author), Schön, Thomas B. (author)
The linear–quadratic-Gaussian (LQG) control paradigm is well-known in literature. The strategy of minimizing the cost function is available, both for the case where the state is known and where it is estimated through an observer. The situation is different when the cost function has an exponential discount factor, also known as a prescribed...
journal article 2019
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Barendswaard, S. (author), Pool, D.M. (author), van Paassen, M.M. (author), Mulder, M. (author)
Vehicle control tasks require simultaneous control of multiple degrees-of-freedom. Most multi-axis human-control modeling is limited to the modeling of multiple fully independent single axes. This paper contributes to the understanding of multi-axis control behavior and draws a more realistic and complete picture of dual-axis manual control....
journal article 2019
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Plaetinck, Wouter (author), Pool, D.M. (author), van Paassen, M.M. (author), Mulder, M. (author)
Time-varying pilot control identification is essential for better understanding of how pilots respond when faced with sudden changes in the dynamics of the vehicle they control, such as when automatic control and stabilization systems disengage or undergo a mode transition. This paper presents the results of a human-in-the-loop experiment...
journal article 2019
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Chen, Y. (author), Liu, Yao-Hong (author), Zong, Z. (author), Dijkhuis, Johan (author), Dolmans, Guido (author), Staszewski, R.B. (author), Babaie, M. (author)
In this paper, we propose a method to suppress supply pushing of an LC oscillator such that it may directly operate from a switched-mode dc-dc converter generating fairly large ripples. A ripple replication block (RRB) generates an amplified ripple replica at the gate terminal of the tail current source to stabilize the oscillator's tail...
journal article 2019
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Huang, Y. (author), Pool, D.M. (author), Stroosma, O. (author), Chu, Q. P. (author)
High precision motion control of hydraulic manipulators is challenging due to the highly nonlinear dynamics and model uncertainties typical for hydraulic actuators. This paper addresses the implementation of a novel sensor-based incremental nonlinear dynamic inversion control technique for a high-precision hydraulic force controller in existence...
journal article 2019
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Narayanan, Prasobh (author), Verhagen, W.J.C. (author), Dhanisetty, V.S.V. (author)
Airline operators face accidental damages on their fleet of aircraft as part of operational practice. Individual occurrences are hard to predict; consequently, the approach towards repairing accidental damage is reactive in aircraft maintenance practice. However, by aggregating occurrence data and predicting future occurrence rates, it is...
journal article 2019
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Saikumar, N. (author), Sinha, Rahul Kumar (author), Hossein Nia Kani, S.H. (author)
This paper presents a novel nonlinear (reset) disturbance observer for dynamic compensation of bounded nonlinearities like hysteresis in piezoelectric actuators. Proposed Resetting Disturbance Observer (RDOB) utilizes a novel Constant-gain Lead-phase (CgLp) element based on the concept of reset control. The fundamental limitations of linear...
journal article 2019
Searched for: subject:"Controllability"
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