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Item type:Publication, Access status: without files , Data-Driven Control for a Class of Non-Linear MIMO Systems(2019-01-18); ; ; We extend a recently proposed data-driven control technique for reference tracking to a class of Multi-Input Multi-Output (MIMO) systems where the coupling between the different states is 'weak' in the sense of an induced norm. Using analysis results from earlier work and by augmenting it with small-gain arguments for the coupling terms, we extend the analysis to MIMO systems. Additionally, a systematic procedure is proposed to tune and estimate the controller parameters. The data-driven controller is implemented in simulation and on an experimental Control Moment Gyroscope (CMG) test bed. The effectiveness of the technique is demonstrated by comparing its tracking performance to that of an LPV controller.Publicationtype: Conference Paper134 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: without files , A Review of Land-Based Rainwater Harvesting Systems for Micro and Macro-CatchmentsIn arid and semi-arid regions of the world, water is the limiting factor for food production; especially in areas where rain-fed agriculture dominates. Rainwater harvesting systems have the potential to provide a sustainable source of water, while helping to achieve food security and combat soil erosion and flood hazards, simultaneously, if designed correctly. Therefore, land-based rainwater harvesting systems are able to increase crop yields significantly. A variety of techniques for micro and macro-catchment rainwater harvesting schemes are reviewed, with emphasis on design factors which will ensure a functional system. However, in spite of the potential to increase agricultural productivity with the help of micro and macro-catchment rainwater harvesting, and thus food availability, the implementation of these techniques is not as widely distributed amongst farmers as it could be.Publicationtype: Journal Article152 - Some of the metrics are blocked by yourconsent settings
Item type:Publication, Access status: with files , RUVIVAL Publication Series Volume 2The RUVIVAL Publication Series is part of the e-learning project RUVIVAL. All topics of RUVIVAL Volume 2 are related and part of restoration engineering. Each contribution in this publication is connected to further interactive multimedia material, which can be reached under http://www.hoou.de. This volume consists of 3 literature review papers. The first reviews aquifer recharge, a hydrologic process in which water moves from surface water to groundwater. The recharge of an aquifer can be managed by facilitating natural infiltration processes and/or by the construction of structures that maintain recharge artificially. Several methods are available to enhance the recharge of an aquifer and are introduced in this paper. In addition, the potential of aquifer recharge in arid and semi-arid regions is discussed. The second paper introduces the concept of rainwater harvesting, the collection, storage, and local use of rainwater. Here, challenges and benefits of several rainwater harvesting methods and two best practice examples are introduced. Finally, the third paper goes deeper into the topic of land-based rainwater harvesting and ample techniques for micro and macro-catchments are reviewed.Publicationtype: Journal Issue1196 8705