- About
-
The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 1 to 3 of 3 (0.026 seconds)Spelling suggestions: "subject:"zykloiden"" "subject:"zyklone""
| 1 |
Handlungsüberwachung bei Schizophrenien und Zykloiden Psychosen - Ein Vergleich der diagnostischen Untergruppen anhand der "error-related negativity" (ERN) / Performance monitoring in schizophrenia and cycloid psychoses-a comparison of the diagnostic subgroups on the basis of the "error-related negativity" (ERN)Marschelke, Julia Caterine January 2011 (has links) (PDF)
In der vorliegenden Arbeit sollte anhand der error-related negativity (ERN) eine eingeschränkte Fehlerwahrnehmung und im weiteren Sinne eine eingeschränkte Handlungskontrolle bei Patienten mit Erkrankungn aus dem schizophrenen Formenkreis im Vergleich zu gesunden Probanden dargestellt werden. Für diesen Vergleich wurde zusätzlich die error- positivity (Pe) herangezogen. Anhand dieser Parameter erfolgte zusätzlich ein Vergleich der Patienten mit einer klassischen Schizophrenie und solchen mit einer Zykloiden Psychose mit Blick auf die bereits existierende klinische Differenzierung gemäß Leonhard. Als Ergebnis ließen sich im Vergleich zu den Kontrollprobanden eine eingeschränkte ERN und eine eingeschränkte Pe bei beiden Patientengruppen feststellen. Die Hypothese, dass Patienten mit einer Zykloiden Psychose sich nicht nur klinisch, sondern auch elektrophysiologisch von den Patienten mit einer klassischen Schizophrenie unterscheiden, ließ sich anhand der ERN und der Pe nicht untermauern. Anders als angenommen wiesen die Patienten mit einer Zykloiden Psychose keine weniger starke Einschränkung der beiden elektrophysiologischen Parameter auf. / In this study we used the error-related negativity (ERN) to show a restricted error- perception and in a broader sense, a limited executive control in patients with schizophrenia spectrum psychoses compared to healthy subjects. Additionally we took the error-positivity (Pe) into account in order to compare these groups. Moreover we tried to differentiate patients with a classical schizophrenia from patients with a cycloid psychosis based on the parameters mentioned above in view of the already existing clinical differentiation according to Leonhard. As a result both patient groups showed lower amplitudes for the ERN and the Pe. The hypothesis that patients with cycloid psychosis differ not only clinically but also electrophysiologically from the patients with classical schizophrenia could not be corroborated by means of the ERN and the Pe. Unlike our assumption patients with a cycloid psychosis did not show less severe restrictions in both electrophysiological parameters compared to those with a classical schizophrenia.
|
| 2 |
Modelling and Design of a Test Rig to investigate the dynamic behaviour of a Servo driven Powertrain / Modellierung und Entwurf eines Versuchsstandes zur Untersuchung des dynamischen Verhaltens eines servogetriebenen AntriebsstrangesWittwer, Max 26 March 2018 (has links) (PDF)
In the present work a simulation model for examining the fundamental dynamic behaviour of a servo driven powertrain is developed. This powertrain consists of a permanent magnet synchronous motor, a cycloidal gearbox and a torque motor to apply a load. On basis of this model the selection of components for the design of a test rig is possible. This leads to the constructive draft of the test rig.
In order to model the system, the fundamentals give a brief overview of the components incorporated in the test rig system. With ais of the specified task the simulation purpose is defined and the modelling process enabled. The subsequent system analysis is performed intensively to decompose the system into subsystems, which are then investigated to find the optimal modelling approach for the given simulation task. Particular emphasis is put on the investigation of the cycloidal gearbox subsystem and it shows, that approaches for modelling the dynamic behaviour of the gearbox as a whole have only been published partially.
Therefore, the available modelling approaches are analysed and suitable models are developed as conceptual models. Those will be formalised and implemented in Matlab/Simulink. The model is verified and simulation experiments are performed, that help in the selection of suitable test rig components. On basis of a flexible test rig, finally the constructive draft is presented.
|
| 3 |
Modelling and Design of a Test Rig to investigate the dynamic behaviour of a Servo driven PowertrainWittwer, Max 14 December 2017 (has links)
In the present work a simulation model for examining the fundamental dynamic behaviour of a servo driven powertrain is developed. This powertrain consists of a permanent magnet synchronous motor, a cycloidal gearbox and a torque motor to apply a load. On basis of this model the selection of components for the design of a test rig is possible. This leads to the constructive draft of the test rig.
In order to model the system, the fundamentals give a brief overview of the components incorporated in the test rig system. With ais of the specified task the simulation purpose is defined and the modelling process enabled. The subsequent system analysis is performed intensively to decompose the system into subsystems, which are then investigated to find the optimal modelling approach for the given simulation task. Particular emphasis is put on the investigation of the cycloidal gearbox subsystem and it shows, that approaches for modelling the dynamic behaviour of the gearbox as a whole have only been published partially.
Therefore, the available modelling approaches are analysed and suitable models are developed as conceptual models. Those will be formalised and implemented in Matlab/Simulink. The model is verified and simulation experiments are performed, that help in the selection of suitable test rig components. On basis of a flexible test rig, finally the constructive draft is presented.:1 Introduction
1.1 Motivation
1.2 Procedure
2 Fundamentals
2.1 Definitions
2.2 Modelling
2.3 Servo Drive
2.3.1 Introduction
2.3.2 Permanent Magnet Synchronous Motor
2.3.3 Servo Inverter
2.3.4 Control System
2.4 Torque Motor
2.5 Gearbox
3 Specified Task
4 System Analysis
4.1 Introduction
4.2 Servo Inverter
4.3 Control System
4.4 Servo Motor
4.5 Transmission Elements
4.6 Cycloidal Gearbox
5 Model Formalisation
5.1 Introduction
5.2 Servo Inverter
5.3 Control System
5.4 Servo Motor
5.5 Transmission Elements
5.6 Cycloidal Gearbox
6 Model Implementation
6.1 Introduction
6.2 Servo Inverter
6.3 Control System
6.4 Servo Motor
6.5 Transmission Elements
6.6 Cycloidal Gearbox
7 Simulation
7.1 Introduction
7.2 Solver
7.3 Verification
7.4 System Evaluation
7.4.1 Sensitivity Analysis
7.4.2 Stability Analysis
8 Design of the Test Rig
8.1 Selection of the components
8.2 Constructive Draft
9 Summary and Outlook
|
Page generated in 0.0324 seconds