University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
The Architectural Development in Baghdad's house's elevations"an analytical study in Baghdad's house's elevations at twentieth century
234
249
EN
Shaima
Abbas.
Ali
10.30684/etj.27.7.18
The Architecture is a cultural monumental . It has its action's and reactions<br /> and its position and historical distance . The house , as it concern , one of the<br /> Architectural Phenomenon , has effected from the past till now with the conceptual<br /> and theoretical changes . and since the last has effected in the house as a whole ,<br /> from side . And the product of its elevation , from the other side . And as a result of<br /> no assistance of any research which study the development of Baghdad's house's<br /> elevations during the twentieth century . And to have a completed knowledgement<br /> about this subject , therefore the research problem has been :<br /> "There is no completed knowledgement about the development that<br /> happened in the Baghdad's house's elevations at the twentieth century according to<br /> the cultural and effectiveness"<br /> The work study different points : the architectural development , the development<br /> in the house's elevations at the twentieth century , the theoritcal frame , The<br /> work, Practical study , Results , conclusions and advices<br /> The results refer to the development that happened in the Baghdad's<br /> elevation's houses during the twentieth century.The cultural and social theory<br /> effected in the elevations,coused a harmonycal changes between the elevations and<br /> the theory.<br /> The results refer also to the local and historical values beside the new and<br /> developmental theories and a large interested in the formal values.
https://etj.uotechnology.edu.iq/article_35696.html
https://etj.uotechnology.edu.iq/article_35696_93caa0410962c2b891a450831aef3a2c.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Using Al2O3-Mgo-PSZ ceramic system in cutting tools manufacturing
250
257
EN
Jinan
Sattar
Khashan
Haitham
Razouki.
Salih
10.30684/etj.27.7.19
Recent advance in high-speed cutting materials have focused on reinforcing<br />alumina with different carbides and nitrides in order to improve hardness and fracture<br />toughness, this composites materials use in cutting tools application. The present study<br />concert on properties of cutting tools made by Al2O3 reinforcement by Mg-PsZ. The<br />added weight fractions from ZrO2 are (15% , 20%). The materials cold-pressed at (5, 7,<br />10) ton, at (1400, 1500, 1600 Co) in two hours. The result shows increasing in hardness<br />and densities values of specimen with the increasing the mixing percent also, there is a<br />signification enhancement of specimen properties with increased temperature and<br />pressure, the approperte temperature is 1600 Co with pressure 10 ton.
Advance ceramics,Cutting materials,Composite Materials,Zirconia based ceramics
https://etj.uotechnology.edu.iq/article_35698.html
https://etj.uotechnology.edu.iq/article_35698_0a6617a9e02c74dd823a8933fc25c0fa.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Effect of Pb and Sn Adding on Dry Sliding Wear Behavior of á-Brass (70/30)
258
268
EN
Muna
Khudair.
Abbas
muna.k.abbass@uotechnology.edu.iq
Makarem
Hazem
Abdul-Karim
Thikra
Mahdi.
Ali
10.30684/etj.27.7.20
This work is concerned with a study of dry sliding wear of α–Brass (70/30) with<br />addition of lead and tin(3%wt) for each one alloy. Three brass alloys were prepared by<br />melting and pouring in steel molds. A Pin -on-Disc technique was used. The effect of<br />applied loads and sliding times on wear rate were examined. The results show that the<br />wear rate increases with increasing applied loads and with increasing sliding time at<br />constant sliding speed (2.7m/s) while hardness of steel disc was 35 HRc .<br />The results also show that the brass alloy containing 3% tin has more<br />wear resistance than that of other brass alloys.
wear,Brass alloys,Microstructure,alloying elements
https://etj.uotechnology.edu.iq/article_35702.html
https://etj.uotechnology.edu.iq/article_35702_176f76ba8e30a6970e5d98c2ab82f5a5.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Design and Simulation of Microwave Oscillator
1234
1246
EN
Ahmed
H. Reja
Murooj
N. MohammadAli
Rajaa
K. Jaber
10.30684/etj.27.7.1
This paper is concerned with the design and simulation of fixed frequency microwave<br />oscillator. Scattering parameters of the active device (MESFET-Afm02n8b) are used to<br />design and synthesize the oscillator. The computer aided design package (Microwave<br />Office 2000 version 3.22) is employed to optimize oscillator subcircuits performance<br />such as resonator, feedback, and output matching network. Two techniques are<br />employed for the analysis purposes. The first method involves the open-loop gain and<br />phase response versus frequency, the second method considers the oscillator as one-port<br />with negative resistance. Fixed frequency oscillator at 7GHz is realized and tested.
Microwave oscillator,Negative resistance,Open Loop Gain,Fixed Frequency,and Resonator
https://etj.uotechnology.edu.iq/article_35603.html
https://etj.uotechnology.edu.iq/article_35603_2e38715e934603d6f87f451ae20c9a34.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Evaluation of Elastic Deflections and Bending Moments for Orthotropically Reinforced Concrete Rectangular slabs Supported on Three Edges Only
1247
1259
EN
Hisham
M. AL-Hassani
Husain
M. Husain
Asmaa
Ali Ahmad
Building and Construction Department , University of Technology/Baghdad
10.30684/etj.27.7.2
This paper deals with the evaluation of the elastic deflections and bending moments<br />for orthotropically reinforced concrete rectangular slabs supported on three variously<br />restrained edges with the fourth edge free and subjected to uniformly distributed load.<br />Six cases are considered for such slabs to cover all possible restraining conditions at the<br />three supported edges. Based on the finite difference approach, equations are derived to<br />calculate the maximum values of the positive and negative bending moments as well as<br />the maximum deflection in any of these six slab cases caused by the applied uniform<br />load.
finite difference,free edge,orthotropic,reinforced concrete,Slab
https://etj.uotechnology.edu.iq/article_35606.html
https://etj.uotechnology.edu.iq/article_35606_4d4512cf58a7b4513e1a4fe6730c4fd4.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Design and Implementation of a High Resolution Two Counter Digital Pulse Width Modulation
1260
1269
EN
Jassim
K. Hmood
10.30684/etj.27.7.3
This paper presents a high resolution Digital Pulse Width Modulation "DPWM" for the<br />voltage regulator application. The PWM signal is generated by using two fast clock<br />counters. In this approach, the pulse width is combined from two parts depending on two<br />counter schemes. MSBs of the DPWM generates first part of pulse that achieved by a first<br />counter-phase comparator scheme, and the LSBs of the DPWM generates second part of<br />pulse that obtained through a second counter- phase comparator scheme. The resolution of<br />present pulse width depends on the resolution of second counter.<br />The developed pulse width modulator has high precision, good linearity, and wide duty<br />cycle range. Further, it can be flexibly reconfigured for multi-phase PWM operation with no<br />restriction on duty cycle range. In this work, a 714 kHz switching frequency DPWM module<br />with 9- bit resolution is tested by simulation program
Pulse width modulation,voltage regulator,counters,buck converter
https://etj.uotechnology.edu.iq/article_35629.html
https://etj.uotechnology.edu.iq/article_35629_83f260c8a9bb9672c9075113b3bc9436.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
On The Effect of Flow Direction on Mixed Convection Around Heated Circular Cylinder
1270
1279
EN
Jalal
M. Jalil
Qasim
S. Mehdi
Mohammed
A. Ahmed
10.30684/etj.27.7.4
A numerical investigation of laminar mixed convection around horizontal isothermal<br />cylinder is presented. The free stream direction varies between the vertically upward<br />(assisting flow) and vertically downward (opposing flow). The governing equation in terms<br />of the stream function, vorticity and temperature are expressed in a body-fitted coordinate<br />system and solved numerically by explicit method. Results are presented for Reynolds<br />number from 20 to 300 with Grashof numbers from 0 to 120000. The Prandtl number was<br />kept constant at 0.7. Correlation for the average Nusselt number around the cylinder in the<br />forced and mixed convection regime is suggested. Comparison with previous theoretical and<br />experimental results shows good agreement. It was established that the maximum heat<br />transfer from cylinder occurs in case of assisting flow
Stream function,vorticity,time marching,mixed convection
https://etj.uotechnology.edu.iq/article_35630.html
https://etj.uotechnology.edu.iq/article_35630_e3cfa5e770028434d3d784bd6e2304bc.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Radiation Performance Evaluation of Microstrip Antenna Covered With a Dielectric Layer
1280
1286
EN
Hussain
A. Hammas
10.30684/etj.27.7.5
In this paper, a comprehensive investigation of a microstrip antenna<br />performance covered with a dielectric layer has been presented. An aperture<br />coupled antenna has been designed as a case study. Antenna parameters have<br />been evaluated with and without the presence of a dielectric layer with different<br />thickness values. Theoretical performance evaluation of this antenna for different<br />cases, corresponding to the different dielectric thicknesses, has been assessed<br />using the method of moment (MoM) based EM simulator IE3D, v.10.06. A large<br />number of dielectric thickness variations have been modeled, in an attempt to<br />provide accurate antenna parameters response through this range. Simulation<br />results show that the antenna resonant frequency is reduced as the dielectric layer<br />thickness is increased. To maintain the resonant frequency, the antenna<br />dimensions must be scaled down as a result of the existence of this layer. In<br />addition, results also show that, as the dielectric layer thickness is increased, the<br />resulting antenna gain decreases.
Microstrip aperture coupled antenna,radiation performance,superstrate layer
https://etj.uotechnology.edu.iq/article_35631.html
https://etj.uotechnology.edu.iq/article_35631_c0cc6962159dce4dbf28f324130c8cbc.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Job-Shop Sequencing Real Life Problem With Setup Time
1287
1300
EN
Khallel
Ibrahim Mahmoud
Israr
Ahmad
10.30684/etj.27.7.6
In this paper, we analyzed the sequencing situations on two machines where the machine<br />setup time is not independent of processing order.<br />A real case study of Hadhramout Industrial Company Complex, Mukalla, Yemen is taken<br />as a model. Data is collected and analyzed using MS-Excel by different methods. The problem<br />formulation has been presented. Multiple solutions were obtained by applying sequencing<br />methods. The comparison of different solutions is done to choose the optimal solution. The<br />time is reduced by 23% to perform the group of jobs and the setup time is reduced 30.5% as<br />well as the mean flow time is reduced by 30.5%.
Setup Time,Sequencing,Processing Time,idle time,Scheduling,Ordering
https://etj.uotechnology.edu.iq/article_35632.html
https://etj.uotechnology.edu.iq/article_35632_ce108d77979405004b510927ae654bdb.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Reaction Kinetic ofá-methylstyrene (AMS) Hydrogenation
1301
1316
EN
Zaidoon
M. Shakoor
Mumtaz
A. Zablouk
Adel
A. Shuhaib
10.30684/etj.27.7.7
In this research hydrogenation kinetic of alpha-methylstyrene (AMS) on Pd/Al2O3<br />catalyst was studied. The reaction is mildly exothermic (ÄH=-109 kJ/mol). Intrinsic<br />kinetic law was investigated under wide range of operating conditions 0.1 and 0.2 gm<br />catalyst loading, 0.5-100 wt% AMS, 10, 15 and 20 bar pressure and 343-373 K<br />temperature.<br />The experiment data are fitted to estimate the kinetic parameters for different reaction<br />mechanisms by using ACM (Aspen Custom Modeler) software. Finally the results of<br />produced reaction mechanisms are compared with experimental results to obtain the<br />optimum reaction mechanism
methylstyrene,Hydrogenation,mechanism,catalytic reaction
https://etj.uotechnology.edu.iq/article_35640.html
https://etj.uotechnology.edu.iq/article_35640_aed6c19cdb725e6932f777de5a6cac11.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Electrical Properties of Ba,Ho Doped PbI2
1317
1323
EN
Shatha
Sh. Jamil
Ali
M. Mousa
10.30684/etj.27.7.8
Barium and Holmium have been introduced into polycrystalline lead iodide during<br />solution growth of thin films. Electrical characterization (current vs. voltage measurements ,<br />resistivity, carrier concentration and mobilities as a function of the doping concentrations)<br />clearly demonstrates that both dopants introduce donor level in the PbI2 band gap and<br />compensate for the native acceptor defects of lead iodide, Barium as a dopant having the<br />greater influence.
electerical properties of PbI
https://etj.uotechnology.edu.iq/article_35653.html
https://etj.uotechnology.edu.iq/article_35653_6b2dcffde2d18107a9a82502a1d6eca2.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Remote ECG Signal Monitoring Via Internet
1324
1335
EN
Saleh
M. Al-Qaraawy
Hamid
Mousa Hasan
Maher
Faik Esmaile
10.30684/etj.27.7.9
In this paper the Internet was used as a media for transmission an ECG (Electro-<br />Cardio-gram) signal from a patient directly to a remotely reside doctor or consultant who<br />will respond via the same media directly. The ECG signal (at patient side) has been<br />compressed in a manner to achieve low bandwidth requirement by using Matlab<br />capabilities. Also, at consultant side the original signal is reconstructed using the same<br />capabilities of Matlab. The Internet works as the center of communication between the<br />two sides. A database was used to store the patient information which can be handled<br />easily by consultant. Respecting the internet no more than a simple rented web site was<br />required as a file storage shared between the consultant and patient. The results show<br />that the received signal at the doctor side after reconstruction had the complete and<br />compatible to the signal used for diagnosis.
ECG Monitoring,Via Internet,FTP
https://etj.uotechnology.edu.iq/article_35656.html
https://etj.uotechnology.edu.iq/article_35656_9fd35394bb4f2e3143fdc1a169908fd2.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Studies Pressure Drop of gas-Non-Newtonian Liquid Two Phase Flow in Bubble Column
1336
1350
EN
Ali
H. Jawad
10.30684/etj.27.7.10
An exclusive study has been done on experimental investigation of the two-phase flow<br />pressure drop in an air-non-Newtonian liquid (CMC solutions) system in bubble column.<br />The effects of gas and liquid flow rate on two-phase pressure drop have been illustrated.<br />Experiments in a 0.2-m diameter, 2.4-m-high bubble column were carried out to determine<br />the pressure drop. At the selected superficial velocities, two flow regimes were observed:<br />heterogeneous bubbling flow and heterogeneous churn turbulent flow, they were identified<br />through the slope changes in the plots of pressure drop and gas holdup. The pressure drop<br />did not seem to be affected by the superficial liquid velocity and it was increased as the<br />superficial gas velocity decreased or the CMC concentrations increased.
non,Newtonian fluids,Bubble columns,Hydrodynamics,Pressure drop
https://etj.uotechnology.edu.iq/article_35665.html
https://etj.uotechnology.edu.iq/article_35665_2b4887741669e1cc9e018e1cbc53c98f.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Aircraft Dutch Roll and State Variables Analysis Using Yaw Damper and Washout Filter
1351
1369
EN
Emad
N. Abdulwahab
10.30684/etj.27.7.11
Many high performance aircraft suffer from a dynamic instability problem at relatively<br />high Mach number and altitude regimes known as Dutch roll instability. In this study the<br />aircraft Dutch-roll and lateral –directional state variables may be enhanced using the yaw<br />damper and washout filter. The Aircraft Dutch-roll damping is improved by identifying a<br />suitable feedback gain matrix plus preserving the airframe's low-frequency behavior by the<br />use of a washout filter with a time constant. An intermediate change in terminology is used to<br />illustrate the procedure for including a washout filter into the aircraft lateral state equation<br />formulation. A stability augmentation system (SAS) and a numerical model constructed for a<br />Mig-21 aircraft are solved to illustrate the proposed procedure. The numerical results show<br />that it was sufficient to use (SAS) including both yaw damper and washout filter to improve<br />the aircraft sideslip angle, roll rate and roll angle response in a short time. Finally, the<br />verification of the aerodynamic characteristics of present model was made by comparing the<br />results of the method used (Low order three dimensional Panel method) with that of Cy-20<br />aircraft flight data test.
Dutch roll damping,Yaw damper,Washout filter,Stability augmentation system
https://etj.uotechnology.edu.iq/article_35667.html
https://etj.uotechnology.edu.iq/article_35667_7ce33683fc498683113a9059c2c748e8.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
A New Compact Dual Band GPS Patch Antenna Design Based on Minkowski-Like Pre-Fractal Geometry
1370
1375
EN
Mohammed
Fadhil Hasan
10.30684/etj.27.7.12
A low profile compact microstrip antenna for GPS (L1/L2) application has been<br />presented in this paper. The proposed antenna design is based on the 3rd iteration<br />Minkowski-like pre-fractal geometry. The resulting antenna design offers a compact size,<br />low profile and light weight making it suitable for use in handheld applications. Antenna<br />performance has been evaluated using the EMSightTM from the Applied Wave Research.<br />The proposed antenna has shown to possess two resonance bands (for return loss .-10<br />dB) covering the two GPS bands. Reasonable radiation characteristics have been achieved<br />at the GPS frequencies (L1:1575.42 } 10.23 MHz, L2:1227.60 } 10.23 MHz) with good<br />circular polarization characteristics. Realized circular polarization Bandwidths (for axial<br />ratio . 3 dB) are found to cover adequately those required for these GPS bands.
GPS,Fractal Antenna,Dual Band Antenna,Circular Polarization,axial ratio
https://etj.uotechnology.edu.iq/article_35672.html
https://etj.uotechnology.edu.iq/article_35672_961829469998477d073e3fbeb0060d72.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Offline Signature Recognition and Verification Based on Artifical Neural Network
1376
1384
EN
Mohammed
A. Abdala
Noor
Ayad Yousif
10.30684/etj.27.7.13
In this paper, a problem for Offline Signature Recognition and Verification is presented. A<br />system is designed based on two neural networks classifier and three powerful features (global,<br />texture and grid features). Our designed system consist of three stages: the first is preprocessing<br />stage, second is feature extraction stage and the last is neural network (classifiers)<br />stage which consists of two classifiers, the first classifier consists of three Back Propagation<br />Neural Network and the second classifier consists of two Radial Basis Function Neural<br />Network. The final output is taken from the second classifier which decides to whom the<br />signature belongs and if it is genuine or forged. The system is found to be effective with a<br />recognition rate of (%95.955) if two back propagation of the first classifier recognize the<br />signature and (%99.31) if all three back propagation recognize the signature.
Signature Recognition,Signature verification,features extraction,neural networks
https://etj.uotechnology.edu.iq/article_35675.html
https://etj.uotechnology.edu.iq/article_35675_5a093500d5cc93a55fd3a55d92cf7768.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Numerical Study of Forced Convection in Wavy and Diverged-Converged Ducts
1385
1403
EN
Waheed
S. Mohamad
Sattar
J. Habeeb
Anmar
M. Basheer
10.30684/etj.27.7.14
A three-dimensional study of developing fluid flow and heat transfer through<br />wavy and diverged-converged ducts were studied numerically for a Prandlt number 0.7<br />and 5.85 and compared with flow through corresponding straight duct. The Navier-<br />Stokes and energy equations are solved by using control finite volume method.<br />Development of the Nusselt number in wavy and diverged-converged ducts are<br />presented for different flow rates (50<br /><br />Keywords<br /><br />forced convection<br />---<br />numerical study<br />---<br />wavy duct<br />---<br />diverged-converged duct
Forced Convection,numerical study,wavy duct,diverged,converged duct,Stone columns,Encased,Improvement,Finite elements,Elastomer,composites,Hardness,Wear Rate,Two,Phase Permanent Magnet Synchronous Motor,Kalman Filter,Extended Kalman Filter,Modelling,Matlab,function
https://etj.uotechnology.edu.iq/article_35680.html
https://etj.uotechnology.edu.iq/article_35680_af8803e9471168561c8cd72547e6f7bb.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
Behaviour of Encased Floating Stone Columns
1404
1421
EN
Mohammed
Y. Fattah
Qutaiba
G. Majeed
10.30684/etj.27.7.15
In this paper, the finite element method is utilized as a tool for carrying out different<br />analyses of stone column–soil systems under different conditions. A trial is made to<br />improve the behaviour of stone column by encasing the stone column by geogrid as<br />reinforcement material .<br />The program CRISP2D is used in the analysis of problems. The program adopts the<br />finite element method and allows prediction to be made of soil deformations considering<br />Mohr–Coulomb failure criterion for elastic-plastic soil behaviour.<br />A parametric study is carried out to investigate the behaviour of ordinary and<br />encased floating stone columns in different conditions. Different parameters were studied to<br />show their effect on the bearing improvement and settlement reduction of the stone column.<br />These include the length to diameter ratio (L/d), shear strength of the surrounding soil and,<br />the area replacement ratio (as) and others.<br />It was found that the important increase in strength of stone column occurs when it<br />is encased by geogrid for (length/diameter) L/d = 8 while in case of L/d = 4, a slight<br />increase in the bearing improvement ratio at the early stages of applying the load is<br />obtained and then the value of (q/Cu) for both ordinary and encased stone columns is the<br />same.
Stone columns,Encased,Improvement,Finite elements
https://etj.uotechnology.edu.iq/article_35683.html
https://etj.uotechnology.edu.iq/article_35683_51dda9d3da4375a0257a4cb9ed0738f9.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
A study of the Hardness and Wear Rate of Elastomer Composites Reinforced by Al2O3 and SiO2 Particles
1422
1434
EN
Jawad
K.Oleiwi
Mohammed
S. Hamza
Mayyadah
Sh. Abed
10.30684/etj.27.7.16
This research deals with the study the effect of adding the silica particles and<br />alumina particles separately with different ratio (5, 10, 15, 20, and 25 pphr) on the<br />hardness and wear rate of natural rubber NR and styrene butadiene rubber SBR. The<br />results show that the hardness increases with the increase the loading level of reinforcing<br />particles, while the wear rate decreases with the increase the loading level of the<br />reinforcing particles. The largest value of the hardness and the lowest value of the wear<br />rate were for styrene butadiene reinforced with 25 pphr of silica as compared with<br />natural rubber. Also the reinforcing by SiO2 increases the hardness and decreases the<br />wear rate more than of Al2O3.<br />The results indicated that the hardness and the wear rate for SBR and NR<br />reinforced by SiO2 and Al2O3 at (25 pphr) illustrated in the following table:
Elastomer,composites,Hardness,Wear Rate
https://etj.uotechnology.edu.iq/article_35690.html
https://etj.uotechnology.edu.iq/article_35690_a087e1e79cd81f9f4dc5e3d22f66f451.pdf
University of Technology-Iraq
Engineering and Technology Journal
1681-6900
2412-0758
27
7
2009
05
01
State Estimation of Two-Phase Permanent Magnet Synchronous Motor
1435
1443
EN
Amjed
J. Hamidi
Ahmed
Alaa Ogla
Yaser
Nabeel Ibrahem
10.30684/etj.27.7.17
The goal of this paper is to estimate the states of two-phase permanent magnet synchronous<br />motor (PMSM). The system is highly nonlinear and one therefore cannot directly use any linear<br />system tools for estimation. However, if one can linearize the system around a nominal<br />(possibly time-varying) operating point then linear system tools could be used for control and<br />estimation. Firstly, the error covariance matrices of measurement and process would be derived<br />when the system inputs and outputs are subjected to uncertain variations. Then, the corruptednoise<br />nonlinear model of the system will be discretized and extended to be suitable for applying<br />standard discrete Kalman filter (KF) for state estimation purpose. The entire state estimated<br />system has been modeled using MATLAB/SIMULINK blocks. The state estimation algorithm<br />and the motor discretized model are coded inside special S-functions of m-file type.
Two,Phase Permanent Magnet Synchronous Motor,Kalman Filter,Extended Kalman Filter,Modelling,Matlab,function
https://etj.uotechnology.edu.iq/article_35695.html
https://etj.uotechnology.edu.iq/article_35695_e45098346e6c721da77a7c13caafb862.pdf