• Title/Summary/Keyword: Implementation technique

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Real time Implementation of SHE PWM in Single Phase Matrix Converter using Linearization Method

  • Karuvelam, P. Subha;Rajaram, M.
    • Journal of Electrical Engineering and Technology
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    • v.10 no.4
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    • pp.1682-1691
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    • 2015
  • In this paper, a real time implementation of selective harmonic elimination pulse width modulation (SHEPWM) using Real Coded Genetic Algorithm (RGA), Particle Swarm Optimization technique (PSO) and a new technique known as Linearization Method (LM) for Single Phase Matrix Converter (SPMC) is designed and discussed. In the proposed technique, the switching frequency is fixed and the optimum switching angles are obtained using simple mathematical calculations. A MATLAB simulation was carried out, and FFT analysis of the simulated output voltage waveform confirms the effectiveness of the proposed method. An experimental setup was also developed, and the switching angles and firing pulses are generated using Field Programmable Gate Array (FPGA) processor. The proposed method proves that it is much applicable in the industrial applications by virtue of its suitability in real time applications.

Design and implementation technique of real-time mechanism control language for programmable automation equipment (프로그래밍형 자동화기기를 위한 실시간 메카니즘 제어언어의 설계 및 구현기법)

  • 백정현;원용훈
    • Journal of the Korean Institute of Telematics and Electronics C
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    • v.34C no.11
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    • pp.29-38
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    • 1997
  • As the trend of the automation is increasing, the usage of the programmable automation equipments like programmable controller(PC), numerical controller(NC), distributed control systems(DCS) and robot controller is greatly expanding in the area of the industrial equipments. But the development of the programing language for the programmable automatic equipment is rarely accomplished. In this paper, we propose design and implementation technique of the real-time mechanism control language by adding time constraint constructs and timing analysis constructs ot conditional statement and iteration statement of a programming language. Moreover, we made it possible to predict plausibility of time constraint constructs of a real time application program at compilation time and developing execution time analysiss technique.

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Implementation of Developement System of Education Contents Utilizing 3D VR (3D VR 기반의 교육 콘텐츠 개발 시스템 구현)

  • Bae, Sungsill;Lee, Jeongmin;Ahn, Sungsoo
    • Journal of Korea Society of Digital Industry and Information Management
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    • v.12 no.1
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    • pp.97-106
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    • 2016
  • 3D virual reality technique develop rapidly such as parts of education, health, national defense, etc. This paper implements an education contents utilizing 3D virtual reality based on HMD. In this paper, contents make up Changdeokgung Palace using to 3Dmax and Unity program, it shows on implemented Helmet Mounted Display. HMD obtain dynamic image from the target source of smart phone. Also, contents consist of service senerio through divided palace position and King's a day's journey especially. Above all, this paper indicate improving performance according to reduced cybersickness and immersion enlargement. And memory capacity reduced by various technique such that file type, compressed file, minimized resource. Proposed technique can obtain dynamic 3D image by HMD implementation at real time basis so that it is possible to use simultaneously multi-source. From the various and practical experiment, it is confirm that proposed 3D VR education system is useful for experience of virtual reality practically.

An efficient iterative improvement technique for VLSI circuit partitioning using hybrid bucket structures (하이브리드 버켓을 이용한 대규모 집적회로에서의 효율적인 분할 개선 방법)

  • 임창경;정정화
    • Journal of the Korean Institute of Telematics and Electronics C
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    • v.35C no.3
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    • pp.16-23
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    • 1998
  • In this paper, we present a fast and efficient Iterative Improvement Partitioning(IIP) technique for VLSI circuits and hybrid bucket structures on its implementation. The IIP algorithms are very widely used in VLSI circuit partition due to their time efficiency. As the performance of these algorithms depends on choices of moving cell, various methods have been proposed. Specially, Cluster-Removal algorithm by S. Dutt significantly improved partition quality. We indicate the weakness of previous algorithms wjere they used a uniform method for choice of cells during for choice of cells during the improvement. To solve the problem, we propose a new IIP technique that selects the method for choice of cells according to the improvement status and present hybrid bucket structures for easy implementation. The time complexity of proposed algorithm is the same with FM method and the experimental results on ACM/SIGDA benchmark circuits show improvment up to 33-44%, 45%-50% and 10-12% in cutsize over FM, LA-3 and CLIP respectively. Also with less CUP tiem, it outperforms Paraboli and MELO represented constructive-partition methods by about 12% and 24%, respectively.

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Implementation Method of Overmodulation Technique With High Linearity in DSP (선형성이 우수한 과변조 기법의 DSP 구현 방법)

  • Kim, Joon-Seok;Kim, Do-Hyen;Lee, June-Hee;Lee, June-Seok
    • The Transactions of the Korean Institute of Power Electronics
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    • v.27 no.2
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    • pp.118-125
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    • 2022
  • With the aim to maximize the use of a given voltage source in the field of railway and electric vehicles, this study applies a technique for controlling the overmodulation region between the linear and the six-step regions. High linearity overmodulation techniques that do not use look-up table (LUT) to digital signal processor (DSP) using carrier based pulse width modulation (PWM) are proposed. Such technique requires the phase of the voltage vector at the point where the circular trajectory of the voltage command vector and hexagonal cross each other. Therefore, a method is proposed to obtain a phase of a voltage vector that is derived through an equation and applied to a carrier-based PWM. Validity of the proposed implementation method is confirmed through simulation and experiment.

Fast Response Technique 2 Quadrant DC Motor Speed Control

  • W. Piyarat;V. Tipsuwanporn;W. Sawangsinkasikit;Lee, M. lajindarairerk;P. Thepsatorn
    • 제어로봇시스템학회:학술대회논문집
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    • 1999.10a
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    • pp.244-247
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    • 1999
  • This paper presents a methodology of the technique for controlling DC motor drive by implementation of 2-quadrant operating mode which can ensure the torque controlling and speed with response time less than 2 seconds at all loading conditions. By implementation of BRM technique, energy is fed with definite values of BRM 256 bits, with different patterns of high accuracy, and fixing scan time at 0.667 ms, the ripple is less than 1%, thus high efficiency can be achieved, from the consequence of the accuracy of energy feeding at low current. The stability of the whole system can be determined from circle criterion by root locus method . The instant reverse direction of rotation can be done by decreasing the energy to the lowest level while motor is running with no load and variable load at the speed about 100-120 rpm and 50-60 rpm.

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An implementation of INS calibration technique using the velocity initialization (속도오차 초기화를 이용한 관성항법장치 교정기법의 구현)

  • 박정화;김천중;신용진
    • 제어로봇시스템학회:학술대회논문집
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    • 1997.10a
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    • pp.1679-1683
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    • 1997
  • In this paper a linear Kalman filter for calibration of gimballed inertial navigation system(GINS) is designed and its performace is analyzed through the simulation with a real navigation data. Simulation results show that the proposed Kalman filter gives a good performance to calibrate the sensor errors.

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Visual Component Assembly and Tool Support Based on System Architecture

  • Lee, Seung-Yun;Kwon, Oh-Cheon;Shin, Gyu-Sang
    • ETRI Journal
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    • v.25 no.6
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    • pp.464-474
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    • 2003
  • Component-based development leverages software reusability and reduces development costs. Enterprise JavaBeans (EJB) is a component model developed to reduce the complexity of software development and to facilitate reuse of components. However, EJB does not support component assembly by a plug-and-play technique due to the hard-wired composition at the code level. To cope with this problem, an architecture for EJB component assembly is defined at the abstract level and the inconsistency between the system architecture and its implementation must be eliminated at the implementation level. We propose a component-based application development tool named the COBALT assembler that supports the design and implementation of EJB component assembly by a plug-and-play technique based on the architecture style. The system architecture is first defined by the Architecture Description Language (ADL). The wrapper code and glue code are then generated for the assembly. After the consistency between the architecture and its implementation is checked, the assembled EJB components are deployed in an application server as a new composite component. We use the COBALT assembler for a shopping mall system and demonstrate that it can promote component reuse and leverage the system maintainability.

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The Effect of Abdominal Daoyin and Lymphatic Circulation Technique in combination with Whole-body Articulation Mechanics Technique Therapy on Indigestion after Constitutional Diet: A Case Report (체질 식이 이후에 발생한 소화불량에 대한 전신관절역학 치료 중 복부도인술과 림프순환기법의 효과: 증례보고)

  • Young-Sung Kang;Hye-Jin Park;Dong-Yun Baek;Sang-Hyun Lee;Eui-Hyoung Hwang
    • The Journal of Churna Manual Medicine for Spine and Nerves
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    • v.18 no.2
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    • pp.75-84
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    • 2023
  • Objectives This study aimed to report the effectiveness of abdominal Daoyin and lymphatic circulation technique in conjunction with whole-body articulation mechanics technique therapy in treating indigestion. Methods Three patients who suffered from dyspepsia and abscess after consuming foods incompatible with their constitution, following a 10-year implementation of a constitutional diet at a local Korean Medicine clinic, visited a Korean Medicine Hospital. The patients underwent treatment with abdominal Daoyin and lymphatic circulation technique. The effects of these techniques were analyzed using a retrospective record analysis method. Results Following the implementation of abdominal Daoyin and lymphatic circulation technique for indigestion, the numeric rating scale scores improved significantly. Case 1 improved from 9 to 2, case 2 from 6 to 0, and case 3 from 5 to 1. Conclusions While acknowledging the limitations of being a case report involving only three patients and the absence of specialized outcomes for digestive issues, this report may provide a preliminary basis for considering the efficacy of Chuna manual therapy in indigestion treatment.