- document
- Aldo Yonathan Sebastian, A.Y. (author) master thesis 2020
- document
-
van Engen, Veerle (author)Preventing or decreasing chronic health conditions by healthy eating is increasingly seen as a shared responsibility. Defining what is healthy is person-specific, depending amongst others on a person’s health and responses to food. Supermarkets, which are considered highly influential in shaping the diet of customers, are starting to serve...master thesis 2020
- document
-
Kan, Chi Wai (author)As technology is advancing, the need for precision stages is increasing. These stages are being used with (electron) microscopes for scientific research and industrial applications. They can be operated manually or by actuators, where the motorized stages are quite expensive in general and the cost increase significantly if better performance is...master thesis 2020
- document
-
Adla, Soham (author), Rai, Neeraj Kumar (author), Karumanchi, Sri Harsha (author), Tripathi, Shivam (author), Disse, Markus (author), Pande, S. (author)Soil volumetric water content (VWC) is a vital parameter to understand several ecohydrological and environmental processes. Its cost-effective measurement can potentially drive various technological tools to promote data-driven sustainable agriculture through supplemental irrigation solutions, the lack of which has contributed to severe...journal article 2020
- document
-
Pang, Menglin (author), Tiberius, C.C.J.M. (author)This paper presents an approach to analyse the quality, in terms of precision and reliability, of a system which integrates-at the observation-level-landmark positions and GNSS measurements, obtained with a single camera and a digital map, and a single frequency GNSS receiver respectively. We illustrate the analysis by means of design...journal article 2020
- document
-
Wang, Kan (author), Teunissen, P.J.G. (author), El-Mowafy, Ahmed (author)Ambiguity dilution of precision (ADOP) and position dilution of precision (PDOP) are two popular scalar-diagnostics used in Global Navigation Satellite System (GNSS) positioning. Where the ADOP is a predictor for carrier-phase ambiguity resolution performance, the PDOP is meant to predict the receiver-satellite geometry's capability for...journal article 2020
- document
-
Manzaneque Garcia, T. (author), Steeneken, P.G. (author), Alijani, F. (author), Ghatkesar, M.K. (author)Resonant sensors determine a sensed parameter by measuring the resonance frequency of a resonator. For fast continuous sensing, it is desirable to operate resonant sensors in a closed-loop configuration, where a feedback loop ensures that the resonator is always actuated near its resonance frequency, so that the precision is maximized even in...journal article 2020
- document
-
Psychas, D.V. (author), Verhagen, S. (author), Teunissen, P.J.G. (author)A single-receiver integer ambiguity resolution-enabled precise point positioning (PPP-RTK) user experiences a long convergence time when the rather weak single-constellation dual-frequency ionosphere-float model is used. Nowadays, the rapid development of Global Navigation Satellite Systems (GNSS) provides a multitude of available satellites...journal article 2020
- document
-
Ma, H. (author), Zhao, Qile (author), Verhagen, S. (author), Psychas, D.V. (author), Dun, H. (author)This contribution implements the Kriging interpolation in predicting the tropospheric wet delays using global navigation satellite system networks. The predicted tropospheric delays can be used in strengthening the precise point positioning models and numerical weather prediction models. In order to evaluate the performances of the Kriging...journal article 2020
- document
-
Mazouz, Rayan (author)Autonomously landing a spacecraft on the surface of a planetary body with a degree of precision in the order of meters is highly challenging. Over the course of time, the landing ellipse, defined as the region with a 99% likelihood of where a space vehicle will land, has improved steadily but currently still has dimensions in the order of...master thesis 2019
- document
-
Hu, Xin (author)The suspended microchannel resonator is one of the most reliable devices for the mass measurement of biological and chemical specimens. Since it works in vacuum, the energy dissipation is decreased to the minimum. In this case, the instability related to the thermoelastic coupling effect has become a major source of uncertainty and a main...master thesis 2019
- document
-
Nagda, Neel (author)Stringent control demands from the high-tech mechatronics industry have warranted the need to explore potentially advantageous non-linear controllers. Variable Fractional Order (VFO) calculus provides one such avenue to build non-linear PID-like controllers. VFO calculus is the generalization of integer order differentiation and integration,...master thesis 2019
- document
-
Cai, Chengwei (author)The PID controller is one of the most used controllers in the industry. However, fundamental limitations due to linearity restrict its performances when higher bandwidth, stability, and precision are required simultaneously in today’s high-tech industry. Reset control is a promising nonlinear control strategy which can overcome these limitations...master thesis 2019
- document
-
Mao, X. (author)Precise absolute and relative orbit determination, referred to as Precise Orbit Determination (POD) and Precise Baseline Determination (PBD), are a prerequisite for the success of many Low Earth Orbit (LEO) satellite missions. With the spaceborne, high-quality, multi-channel, dual-frequency Global Positioning System (GPS) receivers, typically a...doctoral thesis 2019
- document
-
Jutte, Wouter (author)The application of actively controlled micrometer precision positioning stages in products that are accessible to start-ups, individual consumers or third world countries is currently limited by their price and size. To solve this problem, the use of low-cost and compact components in stages is investigated. Earlier research done in the MSD...master thesis 2019
- document
-
Gurumoorthy, Ramanathan (author)CryoSat-2 is a European Space Agency (ESA) altimeter mission with an objective to study the connection between cryosphere melting and global sea level rise. The satellite carries a Doppler navigation system (DORIS) and a Satellite Laser Ranging system (SLR) to aid the precise computation of orbits down to centimetre level.<br/>CNES/IDS releases...master thesis 2019
- document
-
Chen, Linda (author), Saikumar, N. (author), Hossein Nia Kani, S.H. (author)In this paper, a framework for the combination of robust fractional-order CRONE control with nonlinear reset is given for both first and second generation CRONE control. General design rules are derived and presented for these CRONE reset controllers. Within this framework, fractional-order control allows for better tuning of the open-loop...journal article 2019
- document
-
Increasing the load capacity of planar ferrofluid bearings by the addition of ferromagnetic materialBoots, A. S.T. (author), Krijgsman, L. E. (author), de Ruiter, B. J.M. (author), Lampaert, S.G.E. (author), Spronck, J.W. (author)Ferrofluid pocket bearings are a type of bearing that are able to carry a load using an air pocket encapsulated by a ferrofluid seal. Previously designed ferrofluid bearings show the great potential of the stick-slip-free and low viscous friction bearings, however until now the load capacity is limited. In this article a method is presented...journal article 2019
- document
-
Saikumar, N. (author), Sinha, Rahul Kumar (author), Hassan HosseinNia, S. (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
- document
-
Akyiiz, Erdi (author), Saikumar, N. (author), Hossein Nia Kani, S.H. (author)The high tech industry which requires fast stable motion with nanometer precision continues to mainly use PID which is limited by fundamental linear control limitations. Floor vibrations as disturbance significantly affect performance and their rejection is particularly affected by these limitations. Reset control has provided a promising...journal article 2019