Amirkabir University of Technology
AUT Journal of Modeling and Simulation
2588-2953
2588-2961
49
2
2017
12
01
NGTSOM: A Novel Data Clustering Algorithm based on Game Theoretic and Self-organizing Map
1
10
EN
Mohadeseh
Ghayekhloo
Young Researchers and Elite Club, Qazvin Branch, Islamic Azad University, Qazvin, Iran
m.ghayekhlou@gmail.com
Rasool
Azimi
Young Researchers and Elite Club, Qazvin Branch, Islamic Azad University, Qazvin, Iran
azimi.rasool@gmail.com
Mohamad bagher
Menhaj
Department of Electrical Engineering, Amirkabir University of Technology, Tehran, Iran
menhaj@aut.ac.ir
ehsan
shekari
Department of Decision Science and Knowledge Engineering, University of Economics, Tehran, Iran
e.shekari@gmail.com
10.22060/miscj.2016.850
Identifying clusters is an important aspect of data analysis. The main goal of clustering is to generate compact groups of objects or data that share similar patterns within the same cluster, and isolate these groups from those which contain elements with different characteristics. This paper proposes a novel data clustering algorithm to increase the clustering accuracy. A modified game theoretic self-organizing map (NGTSOM) and neural gas (NG) are used in combination with competitive Hebbian Learning (CHL) to enhance the quality of the map and provide a better vector quantization (VQ) for clustering data. Different strategies are proposed to provide a competitive game for non-winning neurons to participate in the learning phase and obtain more input patterns. The performance of the proposed clustering analysis is evaluated and compared with that of the K-means, the original SOM and NG methods using the different types of data. The clustering results of the proposed method and existing state-of-the-art clustering methods are also compared which demonstrates a better accuracy of the proposed clustering method.
Clustering,game theory,self-organizing map,vector quantization
http://miscj.aut.ac.ir/article_850.html
http://miscj.aut.ac.ir/article_850_d41d8cd98f00b204e9800998ecf8427e.pdf
Amirkabir University of Technology
AUT Journal of Modeling and Simulation
2588-2953
2588-2961
49
2
2017
12
01
Thermo-Electro Mechanical Impedance based Structural Health Monitoring: Euler-Bernoulli Beam Modeling
11
20
EN
Firooz
Bakhtiari-Nejad
Professor
baktiari@aut.ac.ir
Naserodin
Sepehry
PhD student
naser.sepehry@gmail.com
Mahnaz
Shamshirsaz
Faculty bmember
shamshir@aut.ac.ir
10.22060/miscj.2016.841
In recent years, the use of piezoelectric wafer active sensor (PWAS) is increasing as impedance measurement method for non-destructive evaluation (NDE). In this method, the electrical impedance of a bonded PWAS is used to detect any structural defect. The original principle of this method is based on the electromechanical coupling of PZT materials, so any change in a structure lead to a change in mechanical impedance of the structure and electrical impedance of the PWAS can sense this change. Since environmental temperature generate a thermal stress on a structure, therefore electrical impedance of PWAS changes with temperature variation. The thermal stress that affects the output impedance of PWAS is also developed. In addition of considering the temperature dependency of PWAS and structure material properties, a temperature dependent model is considered for a PWAS bonded to an Euler Bernoulli clamped-clamped beam. The Rayleigh-Ritz and spectral element methods have been studied and verified by 3D finite element method (FEM).
Thermal Stress,Euler Bernoulli Beam,Spectral Element Method,Impedance based Structural Health monitoring,3D FEM
http://miscj.aut.ac.ir/article_841.html
http://miscj.aut.ac.ir/article_841_d41d8cd98f00b204e9800998ecf8427e.pdf
Amirkabir University of Technology
AUT Journal of Modeling and Simulation
2588-2953
2588-2961
49
2
2017
12
01
Generalized Aggregate Uncertainty Measure 2 for Uncertainty Evaluation of a Dezert-Smarandache Theory based Localization Problem
21
30
EN
Alireza
Mohammad Shahri
Faculty - University of Science and Technology
shahri@iust.ac.ir
mehdi
khodabandeh
University of Hamedan
khodabandeh@hut.ac.ir
10.22060/miscj.2016.826
In this paper, Generalized Aggregated Uncertainty measure 2 (GAU2), as a new uncertainty measure, is considered to evaluate uncertainty in localization of an object using cameras’ images. The theory which is applied in a hierarchical decision making system to combine cameras’ images is Dezert-Smarandache theory. To evaluate decisions, an uncertainty analysis is performed in each level of the decision making system. The supervision is based on the second generalization of Aggregated Uncertainty measure (GAU2) whereas it is applicable for DSmT results. The GAU2 measure in spite of the GAU1 measure can be applied to the problems with unclear frontiers or continuous events. This measure helps to make decisions based on better preference combinations of sensors or methods of fusion. Classic DSmT and hybrid DSmT using extra knowledge, is applied and then uncertainty evaluation is carried out by GAU2 uncertainty measure. Therefore, more accurate and less uncertain results in localizing the object with high conflict sensory data are generated using the decision making system.
camera’s image,Data Fusion,Dezert-Smarandache theory,uncertainty measurement
http://miscj.aut.ac.ir/article_826.html
http://miscj.aut.ac.ir/article_826_d41d8cd98f00b204e9800998ecf8427e.pdf
Amirkabir University of Technology
AUT Journal of Modeling and Simulation
2588-2953
2588-2961
49
2
2017
12
01
Near-Optimal Controls of a Fuel Cell Coupled with Reformer using Singular Perturbation methods
31
40
EN
Shirin
Nazem-Zadeh
Tarbiat Modares University
nazemzadeh_sh@yahoo.com
Mohammad-Taghi
Hamidi-Beheshti
Tarbiat Modares University
mbehesht@modares.ac.ir
10.22060/miscj.2016.872
A singularly perturbed model is proposed for a system comprised of a PEM Fuel Cell (PEM-FC) with Natural Gas Hydrogen Reformer (NG-HR). This eighteenth order system is decomposed into slow and fast lower order subsystems using singular perturbation techniques that provides tools for separation and order reduction. Then three different types of controllers, an optimal full-order, a near-optimal composite controller based on the slow and fast subsystems, and a near-optimal reduced-order controller based on reduced-order model, are designed. The comparison of closed-loop responses of these three controllers shows that there are minimal degradations in the performance of the composite and the reduced order controllers.
Singular Perturbation,two-time scale,near-optimal controller,Slow/fast subsystems,Schur decomposition
http://miscj.aut.ac.ir/article_872.html
http://miscj.aut.ac.ir/article_872_d41d8cd98f00b204e9800998ecf8427e.pdf
Amirkabir University of Technology
AUT Journal of Modeling and Simulation
2588-2953
2588-2961
49
2
2017
12
01
A Survey on Dynamic Replication Strategies for Improving Response Time in Data Grid Environment
41
50
EN
najme
mansouri
Shahid Bahonar University of Kerman
najme.mansouri@gmail.com
Mohammad
Javidi
Shahid Bahonar University of Kerman, Kerman, Iran
javidi@mail.uk.ac.ir
10.22060/miscj.2016.874
Effective data management is a key issue in a large-scale distributed system such as distributed DBMS, Peer-to-Peer System (P2P), Data Grid, and World Wide Web (WWW). This can be achieved by using a replication technique, which efﬁciently reduces the communication cost and improves the data availability and response time. Different replication strategies can be proposed depending on when, where, and how replicas are created and removed. In this paper, different replication strategies are studied to determine which attributes are considered in a given strategy and which are ignored. A tabular representation of all those parameters is presented to facilitate the future comparison of dynamic replication strategies. This paper also presents some discussion about future work in this direction by proposing some open research challenges.
Data Grid,Dynamic replication,Availability,simulation
http://miscj.aut.ac.ir/article_874.html
http://miscj.aut.ac.ir/article_874_d41d8cd98f00b204e9800998ecf8427e.pdf
Amirkabir University of Technology
AUT Journal of Modeling and Simulation
2588-2953
2588-2961
49
2
2017
12
01
A hybrid modeling for continuous casting scheduling problem
51
60
EN
Mohammad Hosein
Fazel Zarandi
zarandi@aut.ac.ir
Fateme
Kashani Azad
Amirkabir University of Technology
f_kashani90@aut.ac.ir
Amir Hossein
Karimi Kashani
دانشگاه ارشاد دماوند
karimikashani54@yahoo.com
10.22060/miscj.2017.11583.4946
This paper deals with a multi-agent-based interval type-2 fuzzy (IT2F) expert system for scheduling of steel continuous casting. Continuous caster scheduling is complex, extensive and needs the expert staff. Therefore, in this study, a distributed multi-agent-based structure is proposed as a solution. The agents used herein can cooperate and coordinate via various communication protocols. To facilitate such communication, an appropriate negotiation protocol (i.e., contract net protocol) is proposed. The due dates specified by expert staff, are represented by IT2F membership functions (MFs). As a part of the objective functions, a simple procedure is proposed for calculating the total earliness and tardiness penalty, when the due date’s MFs are IT2F. The proposed hybrid multi-agent-based system, combines multi agent systems with type-2 fuzzy concepts which conforms to the real-world continuous casting problem.
Steel production,Continuous caster scheduling,Agent-based system,Negotiation,Fuzzy system
http://miscj.aut.ac.ir/article_891.html
http://miscj.aut.ac.ir/article_891_d41d8cd98f00b204e9800998ecf8427e.pdf
Amirkabir University of Technology
AUT Journal of Modeling and Simulation
2588-2953
2588-2961
49
2
2017
12
01
Developing a model for measuring the severity of effects caused by interconnected units in electronic supply chains
61
70
EN
Abolfazl
Kazemi
Faculty of Industrial and Mechanical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran
abkaazemi@gmail.com
Leila
Ahmadpour
Faculty of Industrial and Mechanical Engineering, Qazvin Branch, Islamic Azad University, Qazvin, Iran
leila8061@gmail.com
10.22060/miscj.2017.11487.4943
For many electronic supply chain networks that can comprise hundreds of companies with over several tiers of suppliers and intermediate customers, there are numerous presenting risks to consider and tackle. In the electronic supply chain, the conditions are even worse, for the characteristics of this supply chain: excessive lean management, global sourcing and the rather more uncertain market demand, electronic companies are forced to manage their supply chains effectively in order to increase efficiency and reactivity. This paper proposes a common mathematical model for estimating severity of interactions between supply chain’s units and how they effect entire supply chain. Based on the model, scholars can model supply chains easily considering interconnected units. Basic characters of supply chains are considered in the model. Units, who are used to simulate the members of supply chains, produce appropriate products by intelligent choices. The relationships among units are connected by their activities then an experimental example is applied in model the proposed model gains its numerical parameters and answers by means of Lingo software.
Supply chain,Interaction,Interconnected units,Propagated effect
http://miscj.aut.ac.ir/article_928.html
http://miscj.aut.ac.ir/article_928_d41d8cd98f00b204e9800998ecf8427e.pdf
Amirkabir University of Technology
AUT Journal of Modeling and Simulation
2588-2953
2588-2961
49
2
2017
12
01
Partial Observation in Distributed Supervisory Control of Discrete-Event Systems
71
80
EN
Vahid
Saeidi
Shahid Beheshti University
vahidsaidi@gmail.com
Ali Akbar
Afzalian
Shahid Beheshti University
afzalian@sbu.ac.ir
Davood
Gharavian
Shahid Beheshti University
d_gharavian@sbu.ac.ir
10.22060/miscj.2017.12041.4997
Distributed supervisory control is a method to synthesize local controllers with systematic observation of the plant. Since the set algebra preserves relationships between variables and provides a simpler way to develop theories, the observation properties are redefined and corresponding propositions are proved by set algebra, in this paper. Moreover, we use local observation properties, i.e. local normality and local relative observability in order to investigate observation properties of local controllers, which are constructed by any localization algorithm that preserves control equivalency to the monolithic supervisor with respect to the plant. These properties enable us to investigate the observation properties from monolithic to distributed supervisory control. Furthermore, observation equivalence property is defined corresponding to the control equivalence in distributed supervisory control with partial observation. It is proved that, providing observation equivalence of the local controllers to the monolithic supervisor, the control equivalence is satisfied, if and only if the intersection of local events sets is a subset or equal to the global observable events set.
Distributed Supervisory Control,Local Normality,Local Relative Observability,Observation Equivalent
http://miscj.aut.ac.ir/article_929.html
http://miscj.aut.ac.ir/article_929_d41d8cd98f00b204e9800998ecf8427e.pdf
Amirkabir University of Technology
AUT Journal of Modeling and Simulation
2588-2953
2588-2961
49
2
2017
12
01
Saturated Neural Adaptive Robust Output Feedback Control of Robot Manipulators: An Experimental Comparative Study
81
90
EN
Mohammad
Pourrahim
Department of Electrical Engineering, Najafabad Branch, Islamic Azad University
pde.mohammad@gmail.com
Khoshnam
Shojaei
Department of Electrical Engineering, Najafabad Branch, Islamic Azad University
khoshnam.shojaee@gmail.com
Abbas
Chatraei
Department of Electrical Engineering, Najafabad Branch, Islamic Azad University
abbas.chatraei@gmail.com
Omid
Shah Nazari
Department of Electrical Engineering, Najafabad Branch, Islamic Azad University
dep_omid@yahoo.com
10.22060/miscj.2017.12177.5010
In this research, an extension of the output feedback tracking controller is proposed and evaluated experimentally for the trajectory tracking of robot manipulators with input saturation. Compared with the output feedback controllers, a radial basis function saturated observer-based controller has been introduced. This technique helps the controller produce feasible control signals for the actuators. As a result, it effectively reduces the risk of the actuators saturation and consequently a better transient response is obtained. Semi-global uniform ultimate boundedness stability of the tracking errors and state estimation errors is guaranteed by Lyapunov stability analysis. Experimental results illustrate the efficiency of the proposed control system.
Actuator saturation,Adaptive robust control,Output feedback,RBF Neural Networks,Robot manipulators
http://miscj.aut.ac.ir/article_927.html
http://miscj.aut.ac.ir/article_927_d41d8cd98f00b204e9800998ecf8427e.pdf
Amirkabir University of Technology
AUT Journal of Modeling and Simulation
2588-2953
2588-2961
49
2
2017
12
01
Adaptive Control for a Telerobotic Surgery System Interacting with Active Soft Tissues
91
100
EN
Maryam
Sharifi
Amirkabir University of Technology
sharifi.m@ut.ac.ir
Heidar Ali
Talebi
Faculty of Amirkabir University of Technology
alit@aut.ac.ir
10.22060/miscj.2017.12074.5000
In this paper, stability and control of a bilateral teleopeartion system, interacting with a non-passive soft tissue, for the application of robotic surgeries is considered. Although there are many researches on improving the performance of a teleoperation system, none of them considered an appropriate model for this kind of tissue. First, a new model that indicates major characteristics of a moving soft tissue as the environment of a teleoperation system is presented. The model consists of a viscoelastic passive part and a non-passive part that acts in parallel to the passive part. In prior works, a proper model for the active behavior of tissue was not presented to the best of our knowledge. After that, by considering communication time delays and uncertainties in the master and slave robot dynamics, ultimate bounded-ness of the master and slave trajectories while interacting with this non-passive environment is guaranteed using an adaptive controller and the ultimate bound is calculated. Moreover, some simulations are done to demonstrate the effectiveness of the proposed approach.
non-passive soft tissue model,viscoelastic model,bilateral tele robotic surgery,communication time delay,Adaptive Control
http://miscj.aut.ac.ir/article_931.html
http://miscj.aut.ac.ir/article_931_d41d8cd98f00b204e9800998ecf8427e.pdf
Amirkabir University of Technology
AUT Journal of Modeling and Simulation
2588-2953
2588-2961
49
2
2017
12
01
3-RPS Parallel Manipulator Dynamical Modelling and Control Based on SMC and nonlinear FL methods
101
110
EN
jafar
keighobadi
Faculty of Mechanical Eng. University of Tabriz
keighobadi@tabrizu.ac.ir
Mohammad
Shahidi Sadeghi
Faculty of Mechanical Eng. University of Tabriz
m.shahidi@tabrizu.ac.ir
Ahamad Reza
Khoogar
Maleke-Ashtar University of Technology, Department of Mechanical Engineering
khoogar@yahoo.com
10.22060/miscj.2017.11945.4985
Abstract: In this paper, a dynamical model based SMC (Sliding Mode Control) is proposed for trajectory tracking of a 3-RPS (Revolute, Prismatic, Spherical) parallel manipulator. Following ignoring small inertial effects of all legs and joints compared with that of the end-effector of 3-RPS, dynamical modeling of the manipulator is performed based on Lagrange method. Through removing the unknown Lagrange multipliers, the distribution matrix of control input vector disappears from the dynamical equations. Therefore, the calculation of the aforementioned matrix is not needed for dynamical modelling which results in decreased mathematical manipulation and low computational burden. As a robust nonlinear control technique, a SMC system is designed for trajectory tracking of the 3-RPS manipulator. According to Lyapanov's direct method, the asymptotic stability and the convergence of 3-RPS manipulator to desired reference trajectories is proved. Based on computer simulations, the robust tracking performance of the proposed SMC system is assessed with respect to FL (feedback linearization) method. The proposed modeling and control algorithms of the 3-RPS may be extended to different kinds of constrained parallel manipulators.
Parallel manipulator,Dynamic modeling,Trajectory tracking,Feedback linearization,sliding mode control
http://miscj.aut.ac.ir/article_992.html
http://miscj.aut.ac.ir/article_992_d41d8cd98f00b204e9800998ecf8427e.pdf
Amirkabir University of Technology
AUT Journal of Modeling and Simulation
2588-2953
2588-2961
49
2
2017
12
01
A comparison between Fourier transform Adomian decomposition method and homotopy perturbation method for linear and non-linear Newell-Whitehead-Segel equations
111
120
EN
Salman
Nourazar
Associate Professor of Mechanical Engineering Department, Amirkabir University of Technology
icp@aut.ac.ir
Hasan
Parsa
0000-0002-3468-8419
Amirkabir University of Technology
hasan_parsa@aut.ac.ir
Alireza
Sanjari
Amirkabir University of Technology
a_70_s@yahoo.com
10.22060/miscj.2017.12051.4998
In this paper, the comparison between the hybrid of Fourier Transform and Adomian Decomposition Method (FTADM) and Homotopy Perturbation Method (HPM) is investigated. The linear and non-linear Newell-Whitehead-Segel (NWS) equations are solved and the results are compared with the exact solution. The comparison reveals that for the same number of components of recursive sequences, the error of FTADM is much less than that of HPM. For the non-linear NWS equation, the accuracy of FTADM is more pronounced than HPM. Moreover, it is shown that as time increases (t→∞) the results of FTADM, for the linear NWS equation, approach zero and for the non-linear NWS equation, the results of FTADM approach 1 with only six recursive components. This is in agreement with the basic physical concept of NWS diffusion equation which is also in agreement with the exact solution.
Fourier transform,Adomian Decomposition Method,Homotopy Perturbation Method,Newell–Whitehead-Segel Equation,Nonlinear Partial Differential Equation
http://miscj.aut.ac.ir/article_990.html
http://miscj.aut.ac.ir/article_990_d41d8cd98f00b204e9800998ecf8427e.pdf