The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Eric J Mittemeijer - One of the best experts on this subject based on the ideXlab platform.
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calibration of the differential dilatometric Measurement Signal upon heating and cooling thermal expansion of pure iron
Thermochimica Acta, 2004Co-Authors: Yongchang Liu, F Sommer, Eric J MittemeijerAbstract:Abstract Differential dilatometry is a technique for precise Measurements of the thermal dilatation of materials. A procedure has been presented for calibration of the differential dilatometric Measurement Signal (length change as a function of temperature), both upon heating and cooling. Measurements of the thermal expansion of pure iron up to 1223 K have been performed by a high-resolution differential dilatometer (resolution in length Measurement of about 10 nm). The magnetic contribution to the length change has been introduced for the first time in an analytic expression for the linear thermal expansion coefficient of ferritic iron. The dilatation Signal has been calibrated on heating and cooling using a sapphire specimen for which recommended dilatation data are available. The ferro- to paramagnetic transition (characterized by the Curie point temperature) has been adopted successfully to calibrate the temperature in dilatometric Measurements upon heating and cooling.
Dariusz Żardecki - One of the best experts on this subject based on the ideXlab platform.
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Sensitivity of a vehicle lane change control system to disturbances and Measurement Signal errors – Modeling and numerical investigations
Mechanical Systems and Signal Processing, 2021Co-Authors: Mirosław Gidlewski, Jerzy Jackowski, Leszek Jemioł, Dariusz ŻardeckiAbstract:Abstract Automatic control of the lane change process forms a basis to automate more complex vehicle maneuvers. The lane change controller model presented in the paper has a mixed structure. In the open-loop structure, the controller works as a reference Signals generator supplying a time course of the steering system angle (reference input Signal), and two time courses of the lateral and angular shifts of the vehicle (reference output Signals). In the closed-loop structure it works as a steering Signal corrector (regulation based on the error Signals between the reference and measured Signals expressing vehicle trajectory). For the validation of the controller algorithm, extensive simulation investigations have been carried out. In these investigations, as a virtual control object, a very detailed and experimentally verified mathematical model of a medium-duty truck has been used. The control system model and its simulation investigations were already presented in several papers by the Authors. This paper presents the results of the research focused on the sensitivity of the control system to disturbances and Measurement Signal errors (noises, offsets, delays).
Jiří Tůma - One of the best experts on this subject based on the ideXlab platform.
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Vehicle Gearbox Noise and Vibration: Measurement, Signal Analysis, Signal Processing and Noise Reduction Measures - Vehicle Gearbox Noise and Vibration: Measurement, Signal Analysis, Signal Processing and Noise Reduction Measures
2014Co-Authors: Jiří TůmaAbstract:Each chapter of this book contains diagrams, figures, tables and references. The first chapter begins by describing pass-by noise legislation as being one of the major problems that an OEM will encounter while developing a vehicle. One of the most significant sources of noise is the radiated noise levels emitted by the transmission gearbox. Unfortunately, axle whine noise, while important for both pass-by noise and interior cabin noise, is not addressed. Chapter 2 describes the fundamentals of Signal processing, the FFT, zoom FFT, windowing and a brief introduction to filters. Chapter 3 introduces the reader to noise signatures of gears, gear mesh frequency, sidebands, gear rattle, periodicity of planetary gears
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vehicle gearbox noise and vibration Measurement Signal analysis Signal processing and noise reduction measures
2014Co-Authors: Jiří TůmaAbstract:Each chapter of this book contains diagrams, figures, tables and references. The first chapter begins by describing pass-by noise legislation as being one of the major problems that an OEM will encounter while developing a vehicle. One of the most significant sources of noise is the radiated noise levels emitted by the transmission gearbox. Unfortunately, axle whine noise, while important for both pass-by noise and interior cabin noise, is not addressed. Chapter 2 describes the fundamentals of Signal processing, the FFT, zoom FFT, windowing and a brief introduction to filters. Chapter 3 introduces the reader to noise signatures of gears, gear mesh frequency, sidebands, gear rattle, periodicity of planetary gears
Siegfried Baudner - One of the best experts on this subject based on the ideXlab platform.
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Measurement Signal versus value in immunoassays for human plasmaproteins.
Scandinavian Journal of Clinical & Laboratory Investigation, 1991Co-Authors: Siegfried BaudnerAbstract:Signal size proportionality to a Measurement value will be obtained in immunoassays only if the following four - theoretical - postulates are fulfilled: The immunochemical reaction behaviour (number and affinity of the epitopes) of the protein analyzed is identical and uniform for both the reference preparations (Standard/Calibrator/Control) and for the analyte in the specimens (uniform physicochemical properties of the proteins). The immunochemical reaction behaviour of the antibody/ies containing reagent used in the immunoassay is identical and uniform from batch to batch with respect to the reactive antibody population. The immunochemical method is so well standardized with the consequence that the size of the Measurement Signal - caused only by the antigen antibody reaction product - will not be falsified (by matrix-and other interfering influences, or by the method principle). The values for the results of plasma protein determination are declared by arbitrary units, e.g. international units (IU). As...
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Measurement Signal versus value in immunoassays for human plasmaproteins.
Scandinavian journal of clinical and laboratory investigation. Supplementum, 1991Co-Authors: Siegfried BaudnerAbstract:Signal size proportionality to a Measurement value will be obtained in immunoassays only if the following four--theoretical--postulates are fulfilled: The immunochemical reaction behaviour (number and affinity of the epitopes) of the protein analyzed is identical and uniform for both the reference preparations (Standard/Calibrator/Control) and for the analyte in the specimens (uniform physicochemical properties of the proteins). The immunochemical reaction behaviour of the antibody/ies containing reagent used in the immunoassay is identical and uniform from batch to batch with respect to the reactive antibody population. The immunochemical method is so well standardized with the consequence that the size of the Measurement Signal--caused only by the antigen antibody reaction product--will not be falsified (by matrix- and other interfering influences, or by the method principle). The values for the results of plasma protein determination are declared by arbitrary units, e.g. international units (IU). As a rule conversion factors to g/L (SI units) are not constant and depend on very many effects. It is very difficult to fulfill all the four theoretical postulates. Therefore the practical consideration of the medical requirements should be taken into account and should be the guideline for approachable solutions.
Ramesh C. Bansal - One of the best experts on this subject based on the ideXlab platform.
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Wide-area Measurement Signal-based stabiliser for large-scale photovoltaic plants with high variability and uncertainty
IET Renewable Power Generation, 2013Co-Authors: Rakibuzzaman Shah, Nadarajah Mithulananthan, Ramesh C. BansalAbstract:In this study, norm bounded linear quadratic Gaussian controller synthesis method is utilised to design a wide-area Measurement Signal (WAMS)-based power oscillation damping controller at photovoltaics (PV) plants. The uncertainties associated with the system are confined by the system matrices which are the affine functions of parameters belong to a convex polytopic region. A hybrid method based on Hankel singular value (HSV) and right-half-plane zeros (RHP-zeros) is utilised to assess and select the optimal feedback Signal for the PV wide-area damping controller. First, the HSVs of the delayed subsystems are employed to preselect the candidate Signals for damping the target mode. Then, the RHP-zeros and the modal interaction measures of the candidate Signals are evaluated. Finally, the Signal with minimum variance in HSV and modal interaction over the wide range of operating conditions is selected as the optimal feedback Signal for the controller design. The wide range of operating conditions is obtained by the probabilistic distribution of loads, synchronous generators and PVs. The approach has been tested on a large 16 machine, 68 bus test system as compared to geometric measures of controllability/observability method and has shown improved performance.