Global ETD Search

21	Laser feedback control for robotics in aircraft assembly / Laseråterkopplad styrning av robotar i flygplansmontering Sunnanbo, Albin January 2003 (has links) <p>The aim of this thesis is to investigate how the absolute accuracy of an industrial robot can be increased by monitoring the position of the robot. The motive is to automate high precision, low volume production such as aircraft industry. A laser tracker that can measure both position and orientation with very high accuracy isused to monitor the robot tool position. The robot and laser tracker are integrated via a standard computer. </p><p>The abilities and performance of the robot, with and without feedback from the laser tracker, are investigated. Robotic drilling is performed with supervision and control from the laser tracker. </p><p>The system is implemented and tested on parts of a demonstrator for new aircraft assembly techniques. The ability to position components with internal friction to (+/-)0.05 mm absolute accuracy is shown.</p> Reglerteknik Laser tracker Leica LTD800 Robot ABB IRB4400 Six degrees of freedom Feedback controller Robot drilling High accuracy Reglerteknik Automatic control Reglerteknik
22	Laser feedback control for robotics in aircraft assembly / Laseråterkopplad styrning av robotar i flygplansmontering Sunnanbo, Albin January 2003 (has links) The aim of this thesis is to investigate how the absolute accuracy of an industrial robot can be increased by monitoring the position of the robot. The motive is to automate high precision, low volume production such as aircraft industry. A laser tracker that can measure both position and orientation with very high accuracy isused to monitor the robot tool position. The robot and laser tracker are integrated via a standard computer. The abilities and performance of the robot, with and without feedback from the laser tracker, are investigated. Robotic drilling is performed with supervision and control from the laser tracker. The system is implemented and tested on parts of a demonstrator for new aircraft assembly techniques. The ability to position components with internal friction to (+/-)0.05 mm absolute accuracy is shown. Reglerteknik Laser tracker Leica LTD800 Robot ABB IRB4400 Six degrees of freedom Feedback controller Robot drilling High accuracy Reglerteknik Automatic control Reglerteknik
23	Hodnocení doby života a změn konfokální mikroskopií / Realisation of method for fluorescence lifetime and spectral changes evaluation using advanced confocal microscopy techniques Rúbal, Radek January 2015 (has links) Content is focused on fluorescence lifetime imaging techniques. Fluorescence lifetime is computed from data acquired with using of Leica TCS SP8X confocal microscope sequential scanning. Algorithms and software for the computation, imaging and analysis of fluorescence lifetime is presented. Software is allowing both 2D and 3D imaging of fluorescence lifetime. Techniques are used for fluorescence lifetime imaging of mesenchymal cells and fibroblasts tainted with SPIO-Rhodamin complex.
24	Evaluierung der Einsatzfähigkeit einer neuartigen Lotstocktechnologie Eder, Rafael 01 December 2022 (has links) Diese Diplomarbeit behandelt die neuartige Lotstocktechnologie AP20 der Firma Leica Geosystems AG. Es geht um die Evaluierung dieses Produkts und die Fragestellung, inwiefern sich die Arbeitsweise und Produktivität in der Vermessungspraxis verändert. So erfolgt zuerst eine Literaturrecherche und Zusammenstellung des aktuellen Stands der Technik. Anschließend werden die Daten und Fakten des AP20 genannt und die Methodik zur Überprüfung erläutert. Die Evaluierung dieser Technologie erfolgt anhand eines fiktiven Kundenauftrages, welcher klassische Vermessungsaufgaben widerspiegelt. Ob die Erfüllung dieses Auftrages gelingt und wie sich die benötigte Zeit für diese Vermessungsaufgaben mit Hilfe des AP20 verändert wird im Zuge dieser Arbeit beantwortet. / This thesis deals with the novel AP20 pole technology from Leica Geosystems AG. It is about the evaluation of this product and the question of how the working method and productivity in surveying practice are changing. The first step is a literature search and a compilation of the current state of the art. Then the data and facts of the AP20 are mentioned and the methodology for the review is explained. This technology is evaluated on the basis of a fictitious customer order, which reflects classic surveying tasks. Whether the fulfillment of this order is successful and how the time required for these surveying tasks changes with the help of the AP20 will be answered in the course of this work. info:eu-repo/classification/ddc/526 ddc:526
25	An assessment of the GPS L5 signal based on multiple vendor receivers Smyers, Serena Ashley 21 February 2012 (has links) The L5 signal of the Global Positioning System (GPS) is becoming available on an increasing number of Block IIF satellites. As the third civilian signal, L5 is superior in signal design to the L1 C/A and L2C civilian signals. This new signal has been marked healthy for use on selected satellites since 2010, yet the hardware capable of tracking the L5 signal is still in the early stages of development. This work investigates the characteristics of the new signal and the quality of data produced by L5-tracking receivers. Commonly used receiver models chosen for this study are the Leica GRX1200+GNSS, the Trimble NetR8, and the Javad Delta TRE-G3TH. The metrics used in this analysis to assess the quality of data produced by these receivers are signal strength, receiver phase noise, receiver code noise, and multipath. The data used in these analyses were obtained from the International GNSS Service for the days of the year 275 to 281 in 2011. Metrics averaged over the GPS week 1656 provide a good indication of the overall performance of the receivers. / text GPS L5 Triple-frequency GPS modernization GPS receiver Signal strength Carrier to noise Multipath Code multipath Code noise Phase noise Receiver noise Block IIF Ionosphere Carrier phase Pseudorange IGS CDDIS SOPAC NOAA CORS Javad Trimble Leica Antenna Gain Tracking loop

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