Extraction of device noise sources from measured data using circuit simulator software

1993 ◽  
Vol 41 (2) ◽  
pp. 340-343 ◽  
Author(s):  
P.K. Ikalainen
Keyword(s):  
Measured Data ◽  
Noise Sources ◽  
Circuit Simulator ◽  
Device Noise

Modelling Techniques for Underwater Noise Generated by Tidal Turbines in Shallow Waters

2011 ◽  
Author(s):  
Thomas P. Lloyd ◽  
Stephen R. Turnock ◽  
Victor F. Humphrey
Keyword(s):  
Measurement Data ◽  
Shallow Waters ◽  
Underwater Noise ◽  
Noise Sources ◽  
Marine Animals ◽  
Tidal Turbines ◽  
Inflow Turbulence ◽  
Modelling Techniques ◽  
Potential Impact ◽  
Device Noise

The modelling of underwater noise sources and their potential impact on the marine environment is considered, focusing on tidal turbines in shallow water. The requirement for device noise prediction as part of environmental impact assessment is outlined and the limited amount of measurement data and modelling research identified. Following the identification of potential noise sources, the dominant flow-generated sources are modelled using empirical techniques. The predicted sound pressure level due to inflow turbulence for a typical turbine is estimated to give third-octave-bandwidth pressure levels of 119 dB re 1 μPa at 20 metres from the turbine at individual frequencies. This preliminary estimate reveals that this noise source alone is not expected to cause permanent or temporary threshold shift in the marine animals studied.

RF CMOS NOISE CHARACTERIZATION AND MODELING

2001 ◽  
Vol 11 (04) ◽  
pp. 1085-1157 ◽  
Author(s):  
CHIH-HUNG CHEN ◽  
M. JAMAL DEEN
Keyword(s):  
Noise Figure ◽  
Low Noise ◽  
Channel Noise ◽  
Noise Sources ◽  
Scattering Parameter ◽  
Circuit Simulator ◽  
Noise Measurements ◽  
Definition Of ◽  
Channel Lengths ◽  
Noise Characterization

This paper presents a through description of radio frequency (RF) noise characterization and modeling of CMOS transistors. It begins with the definition of the four noise parameter of a two-port network - minimum noise figure (NFmin), equivalent noise resistance (Rn), optimized source impedance (Ropt) and optimized source reactance (Xopt). These four parameters are used in device characterization and it is shown how they can be calculated by using the noise two-port network theory and a circuit simulator. Then two de-embedding procedures are discussed in detail for noise and scattering parameter de-embedding to get rid of the parasitic effects from the probe pads and interconnections in the device-under-test (DUT). Ideally there is no frequency and geometry limitation for the method based on a cascade configuration. Methods to directly extract the channel noise, induced gate noise and their correlation from the RF and noise measurements are developed and the extracted noise sources as a function of frequency and bias condition for different channel lengths a presented. Some design consideration for the design of low noise circuits - how to select the device size, choice of DC bias conditions and design device layout, are presented. Finally, some published noise models for the channel noise, induced gate noise and their correlation are discussed.

scholarly journals Determination and Compensation of Non-Active Torques for Parallel HEV Using PMSM/IM Motor(s)

Energies ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2781
Author(s):  
Branislav Dobrucky ◽  
Slavomir Kascak ◽  
Michal Frivaldsky ◽  
Michal Prazenica
Keyword(s):  
Measured Data ◽  
Total Power ◽  
Parallel Operation ◽  
Simulation Experiments ◽  
Matlab Simulink ◽  
Circuit Simulator ◽  
Q Theory ◽  
Accumulator Battery ◽  
Simulation Results

The paper deals with the determination and compensation of non-active torques of parallel HEV using an auxiliary electrical PMSM or IM motor. The non-active oscillating torque generating by the ICE engine was estimated, and consequently, the compensating torque component of the current was determined. Based on real measured data, the four regimes of operation have been investigated: compensating non-active torques, parallel operation, regenerating for PMSM, and both parallel operations, together with compensation. Using of p-q theory, the power of fundamental harmonic is presented by average values PAV, QAV of total power waveforms p(t), and q(t). Worked-out simulation results are used for sizing and dimensioning of PMSM machine, VSI inverter, and traction accumulator-battery. Circuit simulator Matlab/Simulink was used for all simulation experiments.

A Study on Analysis and Improved Methods for Noise and Vibration of Compressor Motor

2011 ◽  
Vol 88-89 ◽  
pp. 564-568
Author(s):  
Xiao Yao Qian ◽  
Ping Ping Wang
Keyword(s):  
Production Quality ◽  
Measured Data ◽  
Quality Analysis ◽  
Control Problems ◽  
Analysis Tool ◽  
Noise Sources ◽  
Noise And Vibration ◽  
Motor Noise ◽  
Motor Production ◽  
Improved Methods

Motor noise and vibration reflect quality control problems for the motor production process,finding out the cause through testing and analyzing the spectrum of motor noise and vibration to educe the main noise sources, thus guiding to improve motor production quality. In this paper by means of noise and vibration measurements, meanwhile carry out statistical and analysis for the measured data to find the influence size of various factors with quality analysis tool, and then adopt some corresponding measures to control the motor noise, hoping to improve the motor quality.

Analysis of Measured Data in Unbalanced Distribution System and Method of making of Distribution System Model for Analyzing

2016 ◽  
Vol 136 (6) ◽  
pp. 759-766 ◽  
Author(s):  
Yu Fujita ◽  
Hiroshi Kobayashi ◽  
Takanori Kodera ◽  
Mutsumi Aoki ◽  
Hiroto Suzuki ◽  
...  
Keyword(s):  
Distribution System ◽  
Measured Data ◽  
System Model
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