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Modeling and control of Mechatronic Devices via the Internet with the use of the Matlab/Simulink software - on example of the manipulator

100%

Kielan P. , Mazur D. , Ludwig M.

Przegląd Elektrotechniczny

2017

tom R. 93, nr 6

26--29

The paper presents remotely controlled system on the example of a manipulator controlled via the Internet by the use of Matlab/Simulink. Individual modules of this control system were presented, with the focus mainly on the description of the control algorithm of the manipulator via the Internet. Analysis of the effectiveness of the proposed method for remote control via the Internet was conducted by using Matlab/Simulink. The analysis was based on comparing the set and recorded trajectory of the manipulator in Cartesian coordinate system.

W artykule przedstawiono układ zdalnego sterowania przykładowym manipulatorem poprzez sieć Internet z zastosowaniem oprogramowania Matlab/Simulink. Opisano poszczególne moduły systemu z naciskiem na algorytm sterowania. Analizę skuteczności proponowanego sposobu zdalnego sterowania za pośrednictwem Internetu przeprowadzono stosując oprogramowanie Matlab/Simulink. Analizę oparto na porównaniu zadanej i zarejestrowanej trajektorii manipulatora w układzie współrzędnych kartezjańskich.

The challenge of extra-intra craniometry: a computer-assisted three-dimensional approach on the equine skull

75%

Lang A. , Brucker P. , Ludwig M. , Wrede T. , Theunert J. , Gasse H.

Folia Morphologica

2017

tom 76

nr 3

Background: The topographical correlations between certain extracranial and intracranial osseous points of interest (POIs), and their age-related changes, are indispensable to know for a diagnostical or surgical access to intracranial structures; however, they are difficult to assess with conventional devices. Materials and methods: In this pilot study, the 3-dimensional coordinates of extra-/intracranial POIs were determined, thus avoiding perspective distortions that used to be intrinsic problems in 2-dimensional morphometry. The data sets were then analysed by creating virtual triangles. The sizes, shapes, and positions of these triangles described the extent and the directions of the age-related shifts of the POIs. A selection of extracranial and intracranial POIs were marked on half skulls of four warmblood horses in two age groups (young: 6 weeks, n = 2; old: 14 and 17 years, n = 2). The x-, y-, and z-coordinates of these POIs were determined with a measurement arm (FaroArm Fusion, FARO Europe®). Direct distances between the POIs as well as their indirect distances on the x-, y-, and z-axis, and angles were calculated. Results: The analysed virtual triangles revealed that some parts of the skull grew in size, but did not change in shape/relative proportions (proportional type of growth, as displayed by POI A and POI B at the Arcus zygomaticus). The same POIs (A and B) remained in a very stable relationship to their closest intracranial POI at the Basis cranii on the longitudinal axis, however, shifted markedly in the dorso-lateral direction. In contrast, a disproportional growth of other parts of the cranium was, for example, related to POI C at the Crista nuchae, which shifted strongly in the caudal direction with age. A topographically stable reference point (so-called anchor point) at the Basis cranii was difficult to determine. Conclusions: Two candidates (one at the Synchondrosis intersphenoidalis, another one at the Synchondrosis sphenooccipitalis) were relatively stable in their positions. However, the epicentre of (neuro-)cranial growth could only be pinpointed to an area between them. (Folia Morphol 2017; 76, 3: 458–472)