Aerodynamic Characteristics Identification of Atmospheric Airplane from Flight Measurement Results

Dizertační práce je zaměřena na téma identifikace aerodynamických charakteristik z letových měření. Tematicky práce spadá do oblasti mechaniky letu a její podoblasti letových vlastností. První, teoretická, část obsahuje charakteristiku tří identifikačních metod a to "Error equation method", "Output error method" a "Filter error method". Dále je zde uveden popis matematického modelu letounu. Stejně jako praktická část, je i teorie zaměřená na pohyb letounu se třemi stupni volnosti v rovině symetrie letounu. Závěr teoretické části je věnován simulaci letových měření s ověřením identifikačních programů. Praktická část se týká přípravy experimentu a jeho vyhodnocení. Pro měření byl vybrán letoun VUT 700 Specto a později jeho elektricky poháněná varianta VUT 700e Specto. Záznam měřených veličin na měřicí ústřednu byl rozšířen o telemetrická data z autopilota a dálkového řízení. Samotná měření pak proběhla s pomocí stabilizace letounu autopilotem při letu v rovině symetrie letounu. V rámci vyhodnocení byly srovnány výsledné odhady parametrů provedené zmíněnými identifikačními metodami s parametry získanými analytickou metodou a ze softwaru DATCOM+.The thesis deals with aerodynamic characteristics identification from flight measurement. The topic is part of flight mechanic – handling qualities. The first theoretic part consists of three identification methods description: Error equation method, Output error method and Filter error method. Mathematical model of an airplane is defined and restricted to the motion with 3 degree of freedom. There is also introduced simulation of flight measurement for identification software validation. Practical part is focused on experiment preparation, execution and evaluation. The airplane VUT 700 Specto had been chosen to carry out flight tests. The airplane was modified to the new electric powered VUT 700e Specto after first measurement flights with combustion engine. Data record from on-board measurement unit was completed by telemetric data from autopilot and remote control system. Flight tests were carried out in stabilised mode of autopilot in symmetric flight. The results were confronted with analytical analysis results and DATCOM+ software parameter estimation.

Accuracy of the determination of liquid viscosity

Tato diplomová práce je zaměřena na reologické vlastnosti kapalin, především na viskozitu a standardní nejistoty. Vysvětluje metody měření viskozity a metody kalibrace vybraných viskozimetrů, princip určování standardních nejistot při nepřímých měření viskozity a hustoty. Cílem diplomové práce bylo vytvořit specializované pracoviště pro měření viskozity a vytvořit dokument použitelný ve výuce předmětů diagnostiky.This master thesis is focused on the rheological properties of liquids, especially on the viscosity and the standard uncertainty. It explains methods of the viscosity measurement and the calibration selected viscometers, the principle of the determination of standard uncertainty by indirect measurement of the viscosity and the density. The main object of this thesis was to create a specialized centre for viscosity measurement and to create a document which could be used by teaching of diagnostics.

Measuring Software for USB Measuring Card National Instruments

V práci je řešena problematika měření s USB měřicí kartou 6009 firmy National Instruments. V první části jsou popsány vlastnosti a parametry měřící karty. Druhá část je zaměřena na programovací prostředí LabView. Ve třetí části je popsán program ke čtení a generování průběhů, jeho přednosti a omezení, způsob použití a jeho nastavení. Na závěr je zhodnoceno provedené validační měření.This thesis deals with measuring with USB card 6009 from National Industries company. The first part of the project deals with attributes and parameters measuring card. The second part of the project is aimed to programming environment LabView. In the third part of the project is descriptioned program to reading and generating curves, preferences and limits of this program, method of use and its options. In the last part of the project is valorization executed measures.

Potential use of high-salininty shallow ground water or wash water for large-scale turf irrigation in Las Vegas, Nevada

Limited water resources and a rapidly growing population combine to present water resource managers in southern Nevada with a need to identify alternative water sources. Although high in salts, there are two potential sources of water available to augment the current supply, shallow ground water and surface (wash) water. A study was conducted at Desert Rose Golf Course to determine the feasibility of using one of these alternative water sources for large-scale turf irrigation; The results of the study indicate that shallow ground water is not a feasible option at this site due to the low yields of the aquifer and the resulting high cost of well installation. Wash water, on the other hand, offers a promising option. Using wash water, blended with reuse water from the wastewater treatment plant, would meet all the water quality parameters of the plant species at the golf course and those required by Nevada state regulations

A Magnetic Distance Sensor with High Precision

A magnetic distance sensor working at very low frequency has been developed to measure distances up to 1 m. The principle is similar to that of the 3-D magnetic tracker, but the system is optimized to minimize the error in distance for static measurements. The system is not affected by conductive objects. The uncertainty caused by noise and interference is below 2 mm, even in a noisy environment. The measurement time of 3 min can be decreased to 1 min, depending on the amplitude of the interferences and the required accuracy. After applying corrections, systematic error of 5 mm was achieved by using a calibration model. The system is scalable up to 20 m range

Patient decision making about organ quality in liver transplantation

It is challenging to discuss the use of high‐risk organs with patients, in part because of the lack of information about how patients view this topic. This study was designed to determine how patients think about organ quality and to test formats for risk communication. Semistructured interviews of 10 patients on the waiting list revealed limited understanding about the spectrum of organ quality and a reluctance to consider anything but the best organs. A computerized quantitative survey was then conducted with an interactive graph to elicit the risk of graft failure that patients would accept. Fifty‐eight percent of the 95 wait‐listed patients who completed the survey would accept only organs with a risk of graft failure of 25% or less at 3 years, whereas 18% would accept only organs with the lowest risk possible (19% at 3 years). Risk tolerance was increased when the organ quality was presented relative to average organs rather than the best organs and when feedback was provided about the implications for organ availability. More than three‐quarters of the patients reported that they wanted an equal or dominant role in organ acceptance decisions. Men tended to prefer lower risk organs (mean acceptable risk = 29%) in comparison with women (mean acceptable risk = 35%, P = 0.04), but risk tolerance was not associated with other demographic or clinical characteristics (eg, the severity of liver disease). In summary, patients want to be involved in decisions about organ quality. Patients' risk tolerance varies widely, and their acceptance of high‐risk organs can be facilitated if we present the risks of graft failure with respect to average organs and provide feedback about the implications for organ availability. Liver Transpl, 2011. © 2011 AASLD.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/88081/1/22437_ftp.pd