scholarly journals Simulation Results and Experimental Validation of SOFC Operation Under Hydrogen

2005 ◽  
Vol 2005-07 (1) ◽  
pp. 806-813
Author(s):  
J. Laurencin
Keyword(s):  
Experimental Validation ◽  
Simulation Results

Coupled Pitch Links for Multiharmonic Isolation Using Fluidic Circuits

2014 ◽  
Vol 59 (4) ◽  
pp. 1-11
Author(s):  
Lloyd H. Scarborough III ◽  
Christopher D. Rahn ◽  
Edward C. Smith ◽  
Kevin L. Koudela
Keyword(s):  
Experimental Validation ◽  
Analytical Models ◽  
Main Rotor ◽  
Fluidic Devices ◽  
Simulation Results ◽  
Fluidic Circuits ◽  
Blade Loads

Replacing stiff pitch links on rotorcraft with coupled fluidic devices has the potential to reduce the aerodynamic blade loads transmitted through the pitch links to the swashplate. Analytical models of two fluidic devices coupled with three different fluidic circuits are derived. These passive fluidlastic systems are tuned, by varying the fluid inertances and capacitances of each fluidic circuit, to reduce the transmitted pitch-link loads. The different circuit designs result in transmitted pitch-link loads reduction at up to three main rotor harmonics. The simulation results show loads reduction at the targeted out-of-phase and in-phase harmonics of up to 88% and 93%, respectively. Experimental validation of two of the fluidic circuits demonstrates loads reduction of up to 89% at the out-of-phase isolation frequencies and up to 81% at the in-phase isolation frequencies.

Investigation of Thermal Effect of Packaged CMOS Compatible Pressure Sensor

Manufacturing ◽  
2002 ◽  
Author(s):  
Chih-Tang Peng ◽  
Ji-Cheng Lin ◽  
Chun-Te Lin ◽  
Kuo-Ning Chiang
Keyword(s):  
Pressure Sensor ◽  
Output Voltage ◽  
Experimental Validation ◽  
Experimental Result ◽  
Pressure Loading ◽  
Simulation Data ◽  
Sensor Performance ◽  
Piezoresistive Pressure Sensor ◽  
Simulation Results ◽  
Stress Buffer

In this study, a packaged silicon base piezoresistive pressure sensor with thermal stress buffer is designed, fabricated, and measured. A finite element method (FEM) is adopted for design and experimental validation of the sensor performance. Thermal and pressure loading on the sensor is applied to make a comparison between sensor experimental and simulation results. Furthermore, a method that transfers simulation stress data into output voltage is proposed in this study, the results indicate that the experimental result coincides with simulation data.

Yaw Rate Estimation for Vehicle Control Applications

1998 ◽  
Vol 120 (2) ◽  
pp. 267-274 ◽  
Author(s):  
N. Sivashankar ◽  
A. G. Ulsoy
Keyword(s):  
Experimental Validation ◽  
Vehicle Control ◽  
Operating Conditions ◽  
Angle Sensor ◽  
Control Applications ◽  
Rate Estimation ◽  
Yaw Rate ◽  
Wide Range ◽  
Simulation Results ◽  
Instrumented Vehicle

This paper describes a method for vehicle yaw rate estimation using two accelerometers and a steer angle sensor. This yaw rate estimate can be used as an inexpensive alternative to commercial yaw rate sensors in vehicle control applications. The proposed method combines two complementary approaches to yaw rate estimation using accelerometers. This new method is superior to either method used by itself. This paper presents the new approach, supporting analyses, simulation results and experimental validation. The simulation results are based upon both linear and nonlinear vehicle dynamics models and include important effects such as sensor drift and noise, disturbances acting on the vehicle, and model uncertainties. The experimental validation is based on test data from a specially instrumented vehicle driven on a test track. These results indicate that the proposed yaw rate estimation scheme performs well for a wide range of operating conditions and is not difficult to implement.

scholarly journals Voronoi diagram based simulation and experimental validation of austenite in C22 and C35 steels

10.30544/482 ◽  
2020 ◽  
Vol 26 (1) ◽  
pp. 31-42
Author(s):  
Sanchu S ◽  
Biju N ◽  
V. N.N. Namboothiri
Keyword(s):  
Heat Treatment ◽  
Voronoi Diagram ◽  
Experimental Validation ◽  
Maximum Error ◽  
Nucleation Theory ◽  
Classical Nucleation Theory ◽  
Continuous Heating ◽  
Microstructure Modeling ◽  
Geometrical Features ◽  
Simulation Results

This paper examines the ability of power Voronoi diagram assisted simulation in microstructure modeling during heat treatment. A model is developed for predicting fraction of austenite evolved during continuous heating of steel to austenite range, by integrating geometrical features of power Voronoi diagram and classical nucleation theory. From the simulation results, it is possible to predict the transformed fraction. The simulation results are validated using experiments conducted on two varieties of steels. The maximum error obtained is 2.08%. Thus, power Voronoi assisted simulation can be considered as an effective tool in modeling microstructure evolution during austenitization.

scholarly journals Automation of microclimate in greenhouses

2020 ◽  
Vol 210 ◽  
pp. 05004
Author(s):  
Marina Ganzhur ◽  
Alexey Ganzhur ◽  
Andrey Kobylko ◽  
Denis Fathi
Keyword(s):  
Intelligent Control ◽  
Experimental Validation ◽  
Fuzzy Controller ◽  
Asynchronous Motor ◽  
Measurement Data ◽  
Indoor Climate ◽  
Intelligent Control System ◽  
Dynamic Simulation Model ◽  
Simulation Results ◽  
Favorable Conditions

An agricultural greenhouse is a complex system with many input features. Taking these features into consideration creates favorable conditions for the production of plants. The parameters are temperature and internal humidity, which have a significant impact on the yield. The aim of this study was to propose a dynamic simulation model in the MATLAB/Simulink environment for experimental validation. In addition, a fuzzy controller for the indoor climate of the greenhouse with an asynchronous motor for ventilation, heating, humidification, etc. has been designed. The model includes an intelligent control system for these drives in order to ensure optimal indoor climate. The dynamic model was validated by comparing simulation results with experimental measurement data. These results showed the effectiveness of the control strategy in regulating the greenhouse indoor climate.

scholarly journals Realization of SIMO biquad filters and quadrature sinusoidal oscillators using OTRAs

2021 ◽  
Author(s):  
Garima Garima ◽  
◽  
Pragati Kumar ◽  
Data Ram Bhaskar ◽  
◽  
...  
Keyword(s):  
Quality Factor ◽  
Experimental Validation ◽  
Low Frequency ◽  
Spice Simulation ◽  
Sinusoidal Oscillators ◽  
Input Multiple Output ◽  
Condition Of Oscillation ◽  
Single Input ◽  
Simulation Results ◽  
Quality Factor Q

In this communication, two single-input multiple-output (SIMO) type biquad filters employing operational transresistance amplifiers (OTRAs) have been presented. Various parameters of the proposed filter circuits viz. pole frequency (ɷ), pole quality factor (Q) and the gain are independently controllable. The proposed filter configurations can also be converted into low frequency oscillators with fully uncoupled control of condition of oscillation and frequency of oscillation with quadrature output voltages. The active and passive sensitivities of the proposed circuits have been found to be small. SPICE simulation results and experimental validation of the proposed circuits employing OTRAs realized with AD844 type CFOAs have also been presented.

scholarly journals Pulse-Propagation Modeling and Experiment for Femtosecond-Laser Writing of Waveguide in Nd:YAG

Crystals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 434 ◽  
Author(s):  
Tao Feng ◽  
Pankaj K. Sahoo ◽  
Francisco R. Arteaga-Sierra ◽  
Christophe Dorrer ◽  
Jie Qiao
Keyword(s):  
Femtosecond Laser ◽  
Experimental Validation ◽  
Pulse Propagation ◽  
Experimental Results ◽  
Propagation Loss ◽  
Type Ii ◽  
Input Energy ◽  
Propagation Equation ◽  
Propagation Modeling ◽  
Simulation Results

In this work, unidirectional pulse propagation equation (UPPE) modeling is performed to study the nonlinear laser-mater interaction in silicon and Nd:Y3Al5O12 (Nd:YAG) crystals. The simulation results are validated with reported experimental results for silicon and applied to Nd:YAG crystals with experimental validation. Stress-induced waveguides are written in Nd:YAG crystals using 515 nm, 300 fs pulses at a 1 kHz repetition rate. Waveguides having a mean propagation loss of 0.21 ± 0.06 dB/cm are obtained, which is lower than the previous reported values for Type-II waveguides written in Nd:YAG crystals. The modeling and experimental results consistently show that the modification (waveguide track) depth increases with input energy. A detailed analysis is presented to control the modal properties of the waveguide in the context of UPPE simulation.

Experimental validation of universal plasma blob formation mechanism

2021 ◽  
Author(s):  
Nirmal Bisai ◽  
Santanu Banerjee ◽  
Stewart Zweben ◽  
Abhijit Sen
Keyword(s):  
Experimental Validation ◽  
Three Dimensional ◽  
Boundary Region ◽  
Tokamak Plasma ◽  
Theoretical Criterion ◽  
Plasma Blob ◽  
Formation And Evolution ◽  
Simulation Results ◽  
Layer Region ◽  
Universal Mechanism

Abstract Abstract Anomalous plasma transport in the boundary region of a tokamak plasma is commonly associated with the formation and evolution of coherent density structures known as blobs. Recently, a theory for a universal mechanism of plasma blob formation has been put forward. It is based on a breaking process of a radially elongated streamer due to poloidal and radial velocity shears. The theory is well supported by two-dimensional and three-dimensional numerical simulation results but lacks experimental validation. In this work, we report the first ever experimental validation of this universal criterion by testing it against NSTX data on blobs obtained using the gas-puff imaging (GPI) diagnostic. It is found that the criterion is widely satisfied in most L-mode discharges and may explain the significantly larger number of blob events. We also validate the theoretical criterion against ADITYA Langmuir probe data taken in the scrape-off layer region.

Cutting Fluid Mist Formation in Turning via Atomization: Part 2—Experimental Validation

2000 ◽  
Author(s):  
Y. Yue ◽  
K. L. Gunter ◽  
D. J. Michalek ◽  
J. W. Sutherland
Keyword(s):  
Dynamic Behavior ◽  
Mass Concentration ◽  
Experimental Validation ◽  
Theoretical Models ◽  
Cutting Fluid ◽  
Formation Mechanisms ◽  
Turning Process ◽  
Model Predictions ◽  
Simulation Results ◽  
Mist Formation

Abstract In Part 1 of this paper, models were developed to describe the formation mechanisms and dynamic behavior of cutting fluid mist. This part of the paper focuses on experimentally investigating mist formation during the turning process, and then simulating the dynamic behavior of the mist droplets, including the distribution and the mass concentration. Simulation results are compared to experimental measurements to validate the theoretical models presented in Part 1. It is seen that the model predictions adequately characterize the observed experimental behavior.

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