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23,675 Article Results

Sanitizer Dosing Decoupling Control Based on IMC-NN Inverse System

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2609
Xie Peizhang , Zhou Xingpeng
Multi tunnels multi pools (MTMP) structure is very common in tap-waterworks, MTMP structure sanitizer dosing system is a complicated system with coupling, large time delay and inertial. Internal model control decoupling based on wavelet neural networks inverse system is introduced to solve the problems. First  order inverse system is identified using wavelet neural networks, this inverse system cascades the original system so that pseudo-linearization system can be obtained, and then this MIMO system can be transformed to SISO system with no coupling. In addition time delay and model error can be overcome by internal model control. Practical application shows that the coupling, time delay and inertial of MTMP sanitizer dosing system is overcome, also this method is able to resist the disturbance and improve the robustness.DOI: http://dx.doi.org/10.11591/telkomnika.v11i9.3247
Volume: 11
Issue: 9
Page: 5048-5054
Publish at: 2013-09-01

Modeling and Simulation of Wave Gait of a Hexapod Walking Robot: A CAD/CAE Approach

10.11591/ijra.v2i3.pp104-111
Abhijit Mahapatra , Shibendu Shekhar Roy , Dilip Kumar Pratihar
In the present paper, an attempt has been made to carry out dynamic analysis of a hexapod robot using the concept of multibody dynamics. A CAD (Computer Aided Design) model of a realistic hexapod robot has been made for dynamic simulation of its locomotion using ADAMS (Automatic Dynamic Analysis of Mechanical Systems) multibody dynamics solver. The kinematic model of each leg of three degrees of freedom has been designed using CATIA (Computer Aided Three Dimensional Interactive Application) and SimDesigner package in order to develop an overall kinematic model of the robot, when it follows a straight path. Joint Torque variation as well as the variation of the aggregate center of mass of the robot was analyzed for the wave tetrapod gait. The simulation results provide the basis for developing the control algorithm as well as an intelligent decision making for the robot while in motion.
Volume: 2
Issue: 3
Page: 104-111
Publish at: 2013-09-01

Motor Fault Diagnosis Based on Wavelet Transform

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2648
Lijun Wang , Huijuan Guo , Shenfeng Zhang
The wavelet transform theory is used to motor fault diagnosis in this paper, considering its characteristics of multi-resolution and stronger feature extraction ability than Fourier. The paper emphasizes de-noising and eliminating the singular value point of the wavelet transform in the non-stationary signal. And it makes a detailed and in-depth analysis about how to detect the frequency components of weak signal by using equivalent power spectrum of reconstruction signal, which is acquired by using the wavelet transform. Through the comparison analysis of the simulation signal and motor vibration signal’s experimental data, the corresponding energy of original signal’s equivalent power spectrum and reconstructing signal’s equivalent power spectrum are compared to determine the fault frequency, so as to accurately find out the motor fault. DOI: http://dx.doi.org/10.11591/telkomnika.v11i9.3288 
Volume: 11
Issue: 9
Page: 5336-5343
Publish at: 2013-09-01

End-Effector Position Analysis Using Forward Kinematics For 5 Dof Pravak Robot Arm

10.11591/ijra.v2i3.pp112-116
Jolly Atit Shah , S.S. Rattan , B.C. Nakra
Automatic control of the robotic manipulator involves study of kinematics and dynamics as a major issue. This paper involves the kinematic analysis of a Pravak Robot arm which is used for doing successful robotic manipulation task in its workspace. The Pravak Robot Arm is a 5-DOF robot having all the joints revolute. The kinematics problem is defined as the transformation from the Cartesian space to the joint space and vice versa. In this study the Denavit- Hartenberg (D-H) model is used to model robot links and joints. Pravak Robot Arm is a simple and safe robotic system designed for laboratory training and research applications. This robot allows to gain theoretical and practical experience in robotics, automation and control systems. The MATLAB R2007 is used to analyse end effectors position for a set of joint parameter.
Volume: 2
Issue: 3
Page: 112-116
Publish at: 2013-09-01

Stiffness, Workspace Analysis and Optimization for 3UPU Parallel Robot Mechanism

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2637
Cui Guohua , Wei Bin , Wang Nan , Zhang Yanwei
In this paper, an approach based on the particle swarm optimization is used to optimize the workspace and global stiffness of the 3UPU mechanism simultaneously due to the fact that the workspace is affected while optimizing the stiffness of the mechanism and vice versa. When optimizing one particular performance, one needs to have an objective function. Here the workspace volume of the mechanism is used as an objective function to evaluate the workspace performance of the mechanism. The leading diagonal elements of the stiffness matrix represent pure stiffness in each direction, but this stiffness changes when the moving platform position changes. We call this stiffness as local stiffness. When using the local stiffness as an objective function for stiffness optimization, it can only represent the stiffness in one particular position. Here the global stiffness of the mechanism is used as an objective function to optimize the stiffness of the mechanism. The global stiffness represents mean stiffness over the workspace. DOI: http://dx.doi.org/10.11591/telkomnika.v11i9.3276 
Volume: 11
Issue: 9
Page: 5253-5261
Publish at: 2013-09-01

Multi-robot system using low-cost infrared sensors

10.11591/ijra.v2i3.pp117-128
Anubhav Kakkar , Shivam Chandra , Deepanshu Sood , Ritu Tiwari , Anupam Shukla
This paper presents a proposed set of the novel technique, methods, and algorithm for simultaneous path planning, area exploration, area retrieval, obstacle avoidance, object detection, and object retrieval   autonomously by a multi-robot system. The proposed methods and algorithms are built considering the use of low cost infrared sensors with the ultimate function of efficiently exploring the given unknown area and simultaneously identifying desired objects by analyzing the physical characteristics of several of the objects that come across during exploration. In this paper, we have explained the scenario by building a coordinative multi-robot system consisting of two autonomously operated robots equipped with low-cost and low-range infrared sensors to perform the assigned task by analyzing some of the sudden changes in their environment. Along with identifying and retrieving the desired object, the proposed methodology also provide an inclusive analysis of the area being explored. The novelties presented in the paper may significantly provide a cost-effective solution to the problem of area exploration and finding a known object in an unknown environment by demonstrating an innovative approach of using the infrared sensors instead of high cost long range sensors and cameras. Additionally, the methodology provides a speedy and uncomplicated method of traversing a complicated arena while performing all the necessary and inter-related tasks of avoiding the obstacles, analyzing the area as well as objects, and reconstructing the area using all these information collected and interpreted for an unknown environment. The methods and algorithms proposed are simulated over a complex arena to depict the operations and manually tested over a physical environment which provided 78% correct results with respect to various complex parameters set randomly.
Volume: 2
Issue: 3
Page: 117-128
Publish at: 2013-09-01

Behavior-Based Approach for the Detection of Land Mines Utilizing off the Shelf Low Cost Autonomous Robot

10.11591/ijra.v2i3.pp83-92
Abdel Ilah Nour Alshbatat
Several countries all of the world are affected by landmines. The presence of mines represents a major threat to lives and causes economic problems. Currently, detecting and clearing mines demand specific expertise with special equipment. In this context, this paper offers the design and development of an intelligent controller which can control and enable the robot to detect mines by means of sensors and of processing the fused information to guide soldiers when passing landmines.  This is accomplished by broken down the overall system into two subsystems: sensor technologies and robotic device. Sensors devices include infrared distance sensor, metal detector, ultrasonic range finder, accelerometer sensor, while the structure of the robot in our case consists mainly  of a commercial  off-the-shelf  parts which  are  available  at  low  costs. The proposed controller is mainly based on creating fuzzy rules that reflect the behaviors of soldier beings in controlling a robot in a well known landmine. Simulation and experimental results are presented her to prove the efficiency of the proposed approach. The results show that the system is able to detect landmines and guide soldiers while crossing mines area.
Volume: 2
Issue: 3
Page: 83-92
Publish at: 2013-09-01

Identifying occupational stress among Executive officers in the Nepalese Organizational sector

https://ijere.iaescore.com/index.php/IJERE/article/view/4448
Rabindra Kayastha
This paper is aimed at exploring the experiences of executive officers with occupations related stress. The status of occupational stress is evaluated based on the responses from employees in executive in different organizations of Nepal. Data were collected using a questionnaire survey. The results show there is a significant relationship between occuapational stress factors. The results obtained from the regression analysis showed that stress related factors (role conflict, role …) were found to be significantly related to the total stress level, whereas the stress associated with the working stress factors were insignificant. Results would showed that the different stress and the factor total stress factor was the most significant stressor of work-related stress level (p < 0.01), indicating stressors is one of the main causes of stress among EO of Nepal.DOI : http://dx.doi.org/10.11591/ijere.v2i3.2147    
Volume: 2
Issue: 3
Page: 135-142
Publish at: 2013-09-01

Estimation of Power/Energy Losses in Electric Distribution Systems based on an Efficient Method

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2584
Gheorghe Grigoras , V. Alexandrescu , G. Cartina , Florina Scarlatache
Estimation of the power/energy losses constitutes an important tool for an efficient planning and operation of electric distribution systems, especially in a free energy market environment. For further development of plans of energy loss reduction and for determination of the implementation priorities of different measures and investment projects, analysis of the nature and reasons of losses in the system and in its different parts is needed. In the paper, an efficient method concerning the power flow problem of medium voltage distribution networks, under condition of lack of information about the nodal loads, is presented. Using this method it can obtain the power/energy losses in power transformers and the lines. The test results, obtained for a 20 kV real distribution network from Romania, confirmed the validity of the proposed method. DOI: http://dx.doi.org/10.11591/telkomnika.v11i9.2889
Volume: 11
Issue: 9
Page: 4855-4860
Publish at: 2013-09-01

An Efficient Approach and Procedure to Solve Customer Complaints Based on Combined Rasterization of Geography Information System

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2587
Qiang Chen , Sheng Jie Chen , Wei Guo , Jin Li
To solve customer complaints better for some telecommunication enterprises, a new and efficient approach through combined rasterization of Geography Information System (GIS) is presented in this paper. By the combined rasterization of surface features and landforms, the historical customer complaints and the real-time running state of network will be utilized to handle new complaints simultaneously. Also, an innovative process to handle complaints is proposed, too. The utilization of method and process will shorten the time of processing routine customer complaints. The experimental results show that the efficiency to process customer complaints will be improved greatly and the operation expenditure on customer services for telecommunication operators will be also decreased than before. DOI: http://dx.doi.org/10.11591/telkomnika.v11i9.2279
Volume: 11
Issue: 9
Page: 4878-4884
Publish at: 2013-09-01

A Novel Traveling Wave Based Differential Protection for Distributed Parameter Line

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2616
Baina He , Yunwei Zhao , Hengxu Ha
Traditional current differential protection is based on Kirchhoff’s Law, certainly is severely influenced by the distributed capacitance current. A new traveling wave based differential protective principle is proposed by employing the characteristics of current traveling waves for the distributed parameter line model. There are fixed propagation relations between traveling waves of terminals as the line is healthy or the fault is external, however, the relationship is broken for the internal faults. The protective criterion and scheme are established by this character. The key technique is to quickly calculate the propagating traveling waves from the other terminal on line. The coefficients of propagation function from one terminal to another are obtained by using orthogonal projection methods. The principle and algorithm need not high sampling frequency, are adaptive for not only fundamental component but the transient components, as well as is not sensitive to setting parameters. The large amounts of ATP simulation tests show that the protective scheme and algorithm is simple with high reliability, security, speedy and sensitivity. DOI: http://dx.doi.org/10.11591/telkomnika.v11i9.3254 
Volume: 11
Issue: 9
Page: 5097-5104
Publish at: 2013-09-01

Mobile Computing Clouds Interactive Model and Algorithm Based On Multi-core Grids

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2639
Liu Lizhao , Zhu Shunzhi , Sun Zhonghai , Li Qi
Multi-core technology is the key technology of mobile cloud computing, with the boom development of cloud technology, the authors focus on the problem of how to make the target code computed by mobile cloud terminal multi-core compiler to use cloud multi-core system construction, to ensure synchronization of data cross-validation compilation, and propose the concept of end mobile cloud entity indirect synchronization and direct synchronization; use wave ormation energy conversion, give our a method to calculate indirect synchronization value and direct synchronization value according to the cross experience and cross time of compilation entity; construct function relative level algorithm with Hellinger distance,  and give an algorithm method of comprehensive synchronization value. Through experiment statistics and analysis, take threshold limit value as the average, self-synchronization value as deviation, the update function of indirect synchronization value is constructed; an inter-domain multi-core synchronization flow chart is given; then inter-domain compilation data synchronization update experiment is carried out with more than 3000 end mobile cloud multi-core compilation environment. Through the analysis of data compilation operation process and results, the synchronization algorithm is proved to be reasonable and effective. DOI: http://dx.doi.org/10.11591/telkomnika.v11i9.3279 
Volume: 11
Issue: 9
Page: 5267-5276
Publish at: 2013-09-01

Large-scale Networked Multi-axis Control solution using EtherCAT and Soft Logic

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2632
Zhiyuan Cheng , Qing Ma , Minqi Yan , Yu Zhang
Aiming at the deficiencies of the traditional multi-axis control solution such as complex networked structure, poor clustered-control feature and unsatisfactory engineering practicability, the paper firstly optimized the existing solution in networked fieldbus, controller model, engineering reliability and maintainability. Then it proposed a novel solution combined high speed real-time EtherCAT (Ethernet for control Automation Technology) fieldbus with soft logic controller. The new solution took advantage of extraordinary real-time performance of EtherCAT and made good use of powerful clustered-control architecture of soft logic controller. Thus the new solution is concise and effective to solve the Large-scale networked controlling problem of 1100 distributed motors. Compared with the traditional schemes, the engineering practice shows that the novel solution has the advantage of perfect real-time performance, powerful clustered-control capability, flexible and variable networked structure, excellent engineering practicability.The novel solution is worth using for reference in solve similar large-scale networked controlling problems. DOI: http://dx.doi.org/10.11591/telkomnika.v11i9.3271 
Volume: 11
Issue: 9
Page: 5218-5223
Publish at: 2013-09-01

Quantitative Recognizing Dissolved Hydrocarbons with Genetic Algorithm-Support Vector Regression

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2671
Qu Zhou , Weigen Chen , Xiaoping Su , Shudi Peng
Online monitoring of dissolved fault characteristic hydrocarbon gases, such as methane, ethane, ethylene and acetylene in power transformer oil has significant meaning for condition assessment of transformer. Recently, semiconductor tin oxide based gas sensor array has been widely applied in online monitoring apparatus, while cross sensitivity of the gas sensor array is inevitable due to same compositions and similar structures among the four hydrocarbon gases. Based on support vector regression (SVR) with genetic algorithm (GA), a new pattern recognition method was proposed to reduce the cross sensitivity of the gas sensor array and further quantitatively recognize the concentration of dissolved hydrocarbon gases. The experimental data from a certain online monitoring device in China is used to illustrate the performance of the proposed GA-SVR model. Experimental results indicate that the GA-SVR method can effectively decrease the cross sensitivity and the regressed data is much more closed to the real values. DOI: http://dx.doi.org/10.11591/telkomnika.v11i9.2776
Volume: 11
Issue: 9
Page: 5509-5516
Publish at: 2013-09-01

Inversion of Surface Nuclear Magnetic Resonance by Regularization with Simulated Atomic Transition Method

https://ijeecs.iaescore.com/index.php/IJEECS/article/view/2610
Hongxin Wu , Guofu Wang , Faquan Zhang , Jincai Ye , Anqing Sun
Initial water content impacts the accuracy and resolution of the inversion in surface nuclear magnetic resonance (SNMR). In order to solve this problem, a new method called as regularization combined with simulated atomic transition method (RSATA) is proposed. The inversion of SNMR is transformed into an unconstrained nonlinear global optimization problem, and it solved directly by RSATA without pre-assigning the initial water content distribution. The conjugate gradient linear iterative algorithm is adopted to look for local minimum and global extreme value when using RSATA, and has improved the inversion speed. Results show that this method is a very good solution to solve the effect of initial water content and it is also better than the existing methods on the operation efficiency and the accuracy of inversion. DOI: http://dx.doi.org/10.11591/telkomnika.v11i9.3248
Volume: 11
Issue: 9
Page: 5055-5060
Publish at: 2013-09-01
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