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29,922 Article Results

Back-stepping Adaptive SVM Direct Torque Control of SPMSM Drive system

10.11591/ijeecs.v12.i9.pp6587-6593
Hua Sun , Xuan Cui , Chuansheng Tang
A novel back-stepping adaptive control strategy is proposed to direct torque control (DTC) of surface permanent magnet synchronous motor (SPMSM) in order to solve some problems existed in conventional DTC, such as high flux , torque and current ripple, variable switching frequency, and acoustic noises. PI speed regulator and two hysteresis regulators in the conventional DTC system are substituted by the proposed back-stepping adaptive controller respectively. The output of the designed controller makes space vector modulation (SVM) possible, which further ensures the inverter switching frequency to be fixed. The stability of the controller is verified via Lyapunov stable theory.Simulation results show that the presented control strategy can solve these problems effectively and show strong robust to external disturbance and noise.
Volume: 12
Issue: 9
Page: 6587-6593
Publish at: 2014-09-01

Research on How to Design an Android-based RFID Reader

10.11591/ijeecs.v12.i9.pp6431-6436
Lian Lu
Android is a very popular system in Chinese mobile phone market, while radio frequency identification device (RFID) which is originally used in fields of retail and logistics etc.. is going to be installed into Android to realize the visualization of commodity information (including the updating, discounting, and after-sale service) and the general use for publics. This study firstly discussed the overall design requirements of an Android platform-based RFID reader. Subsequently, basing on design positioning and principle, the design idea and parameters involved in the design realization were given a detailed description. Design was completed with the aid of related mobile phone applications developed by Android smart phone and multi-level technology testing and research. The new design is attempt to build a new technological life in future and further improve life quality.
Volume: 12
Issue: 9
Page: 6431-6436
Publish at: 2014-09-01

Bee Inspired Zonal Vehicle Routing Algorithm in Urban Traffic

10.11591/ijeecs.v12.i9.pp6699-6710
Lei Wu , Licai Yang , Haiqing Liu , Yao Zhang
Abstract Dynamic Route Guidance System, which can provide the drivers with the optimal routes, is one of the most efficient solutions to the traffic jam. This paper presents a bee inspired zonal vehicle routing algorithm to provide a reasonable and effective optimal route for the Dynamic Route Guidance System. Firstly, the proposed algorithm divided the whole traffic network into different traffic guidance zone based on Shapley value game. Then, real time traffic data was collected in each traffic guidance zone by inter-vehicle and vehicle-to-infrastructure communications. Ultimately, the proposal simulated the bee foraging phenomenon in the biological system to synchronously compute the optimal routes in each traffic guidance zone. The simulation results show that the algorithm
Volume: 12
Issue: 9
Page: 6699-6710
Publish at: 2014-09-01

Single Stage RF Amplifier with High Gain for 2.4GHz Receiver Front-Ends

10.12928/telkomnika.v12i3.100
Achmad; Institut Teknologi Bandung Munir , Biru Tutur; Institut Teknologi Bandung Ranum
The paper deals with the numerical and experimental development of single stage radio frequency (RF) amplifier with high gain for 2.4GHz receiver front-ends. The work is motivated by the increasing demand of high-gain receiver amplifier in low-cost especially for wireless local area network (WLAN) application. Prior hardware realization and experimental characterization, the proposed amplifier which uses a single RF transistor of BFP420 type is numerically designed using ADS® software to satisfy the required specification. To obtain the impedance matching at ports of amplifier, microstrip lines are employed at the input and output ports. The prototype of amplifier is realized by use of a dielectric substrate of glass-reinforced epoxy lamination (FR4) board which has thickness of 0.762mm and relative permittivity of 4.3. The prototype is then experimentally characterized and demonstrates the gain of 13.35dB at frequency of 2.4GHz with the noise figure of 3.33dB, the input and output voltage standing wave ratio (VSWR) of 2.08 and 2.55, respectively.
Volume: 12
Issue: 3
Page: 711-716
Publish at: 2014-09-01

Design and Study on Dynamic Measuring System for Field Surface Roughness

10.11591/ijeecs.v12.i9.pp6691-6698
Lv Xiao-Rong , Liu Ming-Dan , Lv Xiao-Lian
Explore the adaptability and relationship of planter to field surface roughness. Through field test of the designed dynamic testing system of field surface roughness, the two types of field surface roughness were detected on the original field surface roughness formed by the working rotary and the field surface roughness formed after planters work. The transfer functions of the system were established, and the dynamic characteristics of the system were analyzed. The results show that, the system is a linear one with the typical first order feature. The dynamic characteristics of the systems such as response speed, frequency bandwidth and thickness of covering soil and other performance indicators are able to meet the requirements of agricultural technology.
Volume: 12
Issue: 9
Page: 6691-6698
Publish at: 2014-09-01

Quantized Feedback Control of Network Empowerment Ammunition with Data-Rate Limitations

10.12928/telkomnika.v12i3.125
Fang; Shenyang Ligong University Jin , Zhi-hua; Shenyang Ligong University Yuan , Qing-Quan; Shenyang Ligong University Liu , Zhang; Agricultural Development Bank of China branch in Liaoning Xing
This paper investigates quantized feedback control problems for network empowerment ammunition, where the sensors and the controller are connected by a digital communication network with data-rate limitations. Different from the existing ones, a new bit-allocation algorithm on the basis of the singular values of the plant matrix is proposed to encode the plant states. A lower bound on the data rate is presented to ensure stabilization of the unstable plant. It is shown in our results that, the algorithm can be employed for the more general case. An illustrative example is given to demonstrate the effectiveness of the proposed algorithm.
Volume: 12
Issue: 3
Page: 525-532
Publish at: 2014-09-01

A Novel Part-of-Speech Set Developing Method for Statistical Machine Translation

10.12928/telkomnika.v12i3.79
Herry; Bandung Institute of Technology Sujaini , Kuspriyanto; Bandung Institute of Technology Kuspriyanto , Arry; Bandung Institute of Technology Akhmad Arman , Ayu; Bandung Institute of Technology Purwarianti
Part of speech (PoS) is one of the features that can be used to improve the quality of statistical-based machine translation. Typically, the language PoS determined based grammar of the language or adopt from other languages PoS. This work aims to formulate a model to developing PoS as linguistic factors to improve the quality of machine translation automatically. The research method using word similarity approach, where we perform clustering of the words contained in a corpus. Further classes will be defined as PoS set obtained for a given language.We evaluated the results of the PoS that defined computational results using machine translation system MOSES as the system by comparing the results of the SMT are using PoS sets generated manually, while the assessment of the system using BLEU method. Language that will be used for evaluation is English as the source language and Indonesian as the target language.
Volume: 12
Issue: 3
Page: 581-588
Publish at: 2014-09-01

Intelligent Train Operation Models Based on Ensemble Regression Trees

10.11591/ijeecs.v12.i9.pp6725-6731
DeWang Chen , XiangYu Zeng , GuiWen Jia
Traditional control algorithms in Automatic Train Operation (ATO) system have some drawbacks, such as high energy consumption and low riding comfort. Combined with data mining methods and driving experience, two Intelligent Train Operation (ITO) models for the subway train control are proposed. Firstly the training data set was sorted out and sieved out from the real train operation data set by drivers in Beijing subway line Yizhuang to establish the standard database. By using Classification and Regression Trees (CART) algorithm and Bagging ensemble learning method which base on CART algorithm, two ITO models are dug out to represent the output of controller with limited speed, running time and gradient. In the train control simulation platform, ITO models were compared with the traditional PID (Proportional Integral Derivative) control algorithm of ATO systems. The simulation results indicate the proposed ITO models are better than PID control in energy consumption, riding comfort and switching times of controller’s output. Furthermore, the ITO model with bagging ensemble learning method is better especially in energy consumption and riding comfort.
Volume: 12
Issue: 9
Page: 6725-6731
Publish at: 2014-09-01

The New Complex-Valued Wavelet Neural Network

10.12928/telkomnika.v12i3.95
Sufang; Shandong University Li , Mingyan; Shandong University Jiang
A new complex-valued wavelet neural network is proposed in this paper, by introducing a modified complex-valued back propagation algorithm, in which a new error function is to be minimized by the algorithm. The improvement performance is further confirmed by the simulation results, which show that the modified algorithm is simpler than the conventional algorithm, and has better convergence, better stability and faster running speed.
Volume: 12
Issue: 3
Page: 613-622
Publish at: 2014-09-01

Short-term Traffic Flow Prediction Based on Multivariable Phase Space Reconstruction and LSSVM

10.11591/ijeecs.v12.i9.pp6946-6953
Duo Zhang , Fengqing Han
Real-time and accurate short-term traffic flow prediction is the premise and key of intelligent traffic control and guidance system. According to this problem, this paper put forward a prediction model based on multivariable phase space reconstruction and least squares support vector machine (LSSVM). First, the model confirms embedding dimension and delay time of the traffic flow, occupancy and average speed time series by analyzing their chaotic characteristics, and reconstructs multivariable state space. Second, the phase points obtained after reconstruction are as input, and the last traffic flow parameters came from the following phase points are as output. Finally, the LSSVM which be trained is adapted to realize short-term traffic flow prediction. This research compares this model with a model based on univariate phase space reconstruction and LSSVM, and the results show that the model proposed in this paper predicts better.
Volume: 12
Issue: 9
Page: 6946-6953
Publish at: 2014-09-01

Model Identification of Traveling Wave Ultrasonic Motor Using Step Response

10.11591/ijeecs.v12.i9.pp6742-6749
Shi Jingzhuo , Zhang Caixia
Ultrasonic motor’s model adapting to control application is the foundation of the motor’s high performance control. Ultrasonic motor’s frequency-speed control model gives a signification to improve speed control performance. This paper shows the design of stepping response experiments, and also explains the model identification of USM by the way of characteristic point method. Considering its time-varying characteristic, model parameters can be fitted using functions with the independent variable is frequency or speed. Consequently, non-linearity can reflect in speed control model appropriately.
Volume: 12
Issue: 9
Page: 6742-6749
Publish at: 2014-09-01

Open Source Based M-Learning Application for Supporting Distance Learning

10.12928/telkomnika.v12i3.104
Arief; STIMIK ProVisi Hidayat , Victor; STIMIK ProVisi Gayuh Utomo
The concept of learning anywhere and anytime is unable to be fully implemented because user need to find comfortable place, which is required, to follow the study. User is unable to access learning material in a way that practical, easy to use and easy to access. Based on that fact, system or application for mobile device such as hand phone, PDA or smart phone is needed.The m-learning application is developed by Computer-Based System Engineering Method based on the principal of software engineering using development steps of System Development Life Cycle (SDLC). SDLC consists of the following steps, analysis, design, implementation, testing and evaluation. Trials as alpha-test, carried out to determine operability of m-learning system on handheld devices. Trial is taken by creating trial class followed by 25 students to receive feedback about the m-learning system. Feedback result shows almost 90% of respondents consider the m-learning system is easy to use.
Volume: 12
Issue: 3
Page: 657-664
Publish at: 2014-09-01

Channel Estimation on 60GHz Wireless System Based on Subspace Pursuit

10.11591/ijeecs.v12.i9.pp6852-6859
Baokai Zu , Xinyuan Xia , Kewen Xia , Chuanjian Bai
Due to the channel with characteristic of sparse multi-path in the 60 GHZ wireless communication system, the channel estimation problem can be attributed to that of sparse signals recovery. And with the consideration of the subspace pursuit (SP) algorithm is superior to the orthogonal matching pursuit (OMP) at reconstruction precision, the channel estimation technique based on the SP algorithm is presented in the 60 GHZ wireless communication system, First, design the OFDM multi-carrier modulation communication system. Then, establish the channel estimation mathematical model with indoor Line-of-sight. Finally, complete the reconstruction of sparse signals using SP algorithm. The experimental results and comparison analysis show that the presented technique based on the SP algorithm provides better channel estimation performances in the same pilot conditions, and it is superior to the technique based on OMP algorithm and the technique based on least square (LS) algorithm.
Volume: 12
Issue: 9
Page: 6852-6859
Publish at: 2014-09-01

Chord-based Resource Identifier-to-Locator Mapping and Searching for the Future Internet

10.12928/telkomnika.v12i3.99
Huanlin; Chongiqng University of Posts and Telecommunications Liu , Hongyue; Chongiqng University of Posts and Telecommunications Dai , Shuaiyong; Chongiqng University of Posts and Telecommunications Wu , Sheng; Chongiqng University of Posts and Telecommunications Huang
A great many problems, such as scalability, mapping data searching, high frequency update of mapping data, arise in the future network resource mapping system for its vast data processing need. Future Network Chord (FN Chord), an algorithm based on Chord and aims at solving the resources identity mapping and searching problem, is put forward by taking advantage of the qualities of scalability, rapid searching speed, high searching efficiency and flexible naming of chord in order to solve this problem. What’s more, an extra interest node index table for FN Chord is designed to record the hotspot resource mapping location in the paper. So, the resource searching strategy, which is named as Interest Index Table Future Network Chord (IIT-FN Chord) is proposed to search the resource in the paper. The entropy weight method is used to calculate the node interest level according the interest nodes’ resource item online time and visited times and to renew the interest index table. Moreover, probability replacement method is proposed to replace the outdated item on interest index table with new item. Simulation results show that the algorithm can decrease the average searching latency, average searching hops and thus increases the searching efficiency for the resource searching.
Volume: 12
Issue: 3
Page: 703-710
Publish at: 2014-09-01

The Implementation of Henon Map Algorithm for Digital Image Encryption

10.12928/telkomnika.v12i3.83
Edi; Universitas Gunadarma Sukirman , Suryadi; Universitas Indonesia MT , M. Agus; Universitas Gunadarma Mubarak
Security information is a very important aspect that must be noticed. Information not only in the form of text but also in form of data image. Using data encription to send private information have been widely use. But still need to improve the endurance from bruto force attack. One ways to improve it, is by using chaos theory with henom algorithm. Test result gave the alghoritm can encrypt image data from grayscale type to colorfull type. Encryption and descryption time proportional to the size image. Composition and variety coulor doesn’t effect the time. This algorithm has key space of  and key sensitivity up to . So, it can be concluded that, the algorithm is very difficult to be cracked by brute force attack.
Volume: 12
Issue: 3
Page: 651-656
Publish at: 2014-09-01
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