• Title/Summary/Keyword: Vector-Processor

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Design and Implementation of Hangul Outline Font Generation Accelerator (한글 외곽선 글자체 생성 가속기의 설계 및 구현)

  • 배종홍;황규철;이윤태;경종민
    • Journal of the Korean Institute of Telematics and Electronics A
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    • v.29A no.2
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    • pp.100-106
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    • 1992
  • In this pape, we designed and implemented a hardware accelerator for the generation of bit map font from Hangul outline font description for LBP (Laser Beam Printer) and screen applications Whole system was implemented as a double size PC/AT application board which consists of processing bolck and display block. The processing block has a master processor (MC68000)and two slave processors which are MC56001 and KAFOG chip responsible for the short vector generation. In the display block, TMS34061 was used for monitor display and GP425 was used for LBP print out. The resolution of the monitor is 640$\times$480 and that of LBP is 2385$\times$3390. The current system called KHGB90-B generates about 100 characters per second where each character consists of 32$\times$32 bits

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IMPLEMENTATION OF FULL WEB-BASED GRAPHIC USER INTERFACE PROCESSOR FOR CFD SOFTWARE (웹 기반 CFD s/w용 GUI 프로세서의 구현)

  • Juraeva Makhsuda;Ivanov Evgeny G.;Song Dong Joo
    • 한국전산유체공학회:학술대회논문집
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    • 2004.10a
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    • pp.121-125
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    • 2004
  • The preprocessor - solver - postprocessor software for 2D/Axisymmetric CSCM Upwind Flux Difference Splitting Navier-Stokes code has been developed for undergraduate educational purpose. This computational fluid dynamics (CFD) software allows students to setup, solve, visualize and control dynamically server for their own fluid problems via Internet. The preprocessor Is capable of generating geometry and grid, initial solution data and required solver control parameters. The postprocessor shows vector plot and contour plot with different options while residual plot shows root-mean-square (RMS) error history graphically and retrieves the data from solver interactively. Special feature of the preprocessor is grid generation part which is based on MFC/Visual C++ application and FORTRAN single block grid generator process. Many users can access solver via Internet from client computers and solve desired problems using locally installed pre- and postprocessor and remote powerful solver part.

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The Development of a super high speed motor driving system for the direct drive type turbo compressor (직접 구동방식의 터보 압축기를 위한 초고속 전동기 구동 시스템 개발)

  • 권정혁;변지섭;최중경
    • Proceedings of the IEEK Conference
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    • 2002.06e
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    • pp.219-222
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    • 2002
  • There are screw, reciprocating type turbo compressor by structure in an air compressor which is essential equipment on the industrial spot. Recently, the application range of a turbo compressor tend to be wide gradually. And this type of compressor needs high speed rotation of impeller in structure so high ratio gearbox and conventional induction motor driving required. This mechanical system have results of increased moment of inertia and mechanical friction loss. Recent studies of modern turbo compressor have been applied to developing super high speed BLDC motor and driver which remove gearbox that make its size small and mechanical friction loss minimum. To accomodate this tendency, we tried to develope a super high speed motor drive system for 150Hp, 70,000rpm direct drive Turbo compressor using DSP(Digital Signal Processor) and SVPWM(Space Vector Modulation PWM) technique. The results of this specific application show that super high speed driver and controller could be implemented well with digital electronics.

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A Study on Control of Load Torque in the Induction Motor using a Disturbance Cancellation Observer (유도 전동기의 외란 상쇄 관측기를 이용한 부하토오크 제어에 관한 연구)

  • Hwang, L.H.;Jang, J.H.;Na, S.K.;Kim, Y.S.;Cho, M.T.;Song, H.B.
    • Proceedings of the KIEE Conference
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    • 2006.07b
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    • pp.1024-1026
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    • 2006
  • This paper designed a robust control of an induction motor using a disturbance cancellation observer of a feedforward control. The speed response of conventional PI controller characteristic is affected by variations of load torque disturbance. In the proposed system, the speed control characteristic using a feedforward control isn't affected by a load torque disturbance. High speed calculation and processing for vector control is carried out by ADMC300 digital signal processor. Validity of the proposed control method is verified through simulation and experimental result.

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Sensorless Speed Control of Induction Motor using Adaptive Observer (적응관측기에 의한 유도전동기의 센서리스 속도제어)

  • Oh, S.H.;Kim, S.H.;Jin, D.W.;Kwon, Y.A.
    • Proceedings of the KIEE Conference
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    • 1997.07a
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    • pp.109-111
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    • 1997
  • A sensorless drive of induction motor has several advantages; low cost and mechanical simplicity. This paper investigates a field-oriented control method without speed and flux sensors. The control strategy is to design an adaptive state observer for flux estimation and to estimate the rotor speed from the estimated rotor flux and stator current. The entire control algorithm including space vector PWM is implemented by software of the digital signal processor TMS320C31. The experimental results indicate good speed responses.

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Finite Element Software Package for Analysis of Electric Field Distribution in Human Body (유한요소법에 의한 인체내 전계분포 해석 용 소프트웨어의 개발)

  • Woo, Eung-Je
    • Proceedings of the KOSOMBE Conference
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    • v.1993 no.05
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    • pp.66-69
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    • 1993
  • We have developed a software package for the analysis of electric field distribution in human body. It includes the graphical finite element mesh generator, linear system of equations solver using sparse matrix and vector technique, and post-processor for the display of the results. This software package can be used in various research areas of biomedical engineering where we inject current or apply voltage to human body. The software package was developed on Macintosh II computer and the size of the model is only limited by the main memory.

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SoC Front-end 설계를 위한 통합 환경

  • 김기선;김성식;이희연;김기현;채재호
    • The Magazine of the IEIE
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    • v.30 no.9
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    • pp.1002-1011
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    • 2003
  • In this paper, we introduce an integrated SoC front-end design & verification environment which can be practically used in the embedded 32-bit processor-core SoC VLSI design. Our introduced SoC design & verification environment integrates two most important flows, such as the RTL power estimation and code coverage analysis, with the functional verification (chip validation) flow which is used in the conventional simulation-based design. For this, we developed two simulation-based inhouse tools, RTL power estimator and code coverage analyzer, and used them to adopt them to our RTL design and to increase the design quality of that. Our integrated design environment also includes basic design and verification flows such as the gate-level functional verification with back annotation information and test vector capture & replay environment.

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Fuzzy Inference of Large Volumes in Parallel Computing Environment (병렬컴퓨팅 환경에서의 대용량 퍼지 추론)

  • 김진일;박찬량;이동철;이상구
    • Proceedings of the Korean Institute of Intelligent Systems Conference
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    • 2000.05a
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    • pp.13-16
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    • 2000
  • In fuzzy expert systems or database systems that have huge volumes of fuzzy data or large fuzzy rules, the inference time is much increased. Therefore, a high performance parallel fuzzy computing environment is needed. In this paper, we propose a parallel fuzzy inference mechanism in parallel computing environment. In this, fuzzy rules are distributed and executed simultaneously. The ONE_TO_ALL algorithm is used to broadcast the fuzzy input vector to the all nodes. The results of the MIN/MAX operations are transferred to the output processor by the ALL_TO_ONE algorithm. By parallel processing of fuzzy rules or data, the parallel fuzzy inference algorithm extracts effective parallel ism and achieves a good speed factor.

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The Design of Digital Controller for Three-Phase Boost Converter using DSP (DSP를 이용한 3상 부스트 컨버터의 디지털 제어기 설계)

  • Cho, Seong-Min;Kim, Beung-Jin;Cho, Heung-Gi;Jeon, Hee-Jong
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.49 no.11
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    • pp.757-762
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    • 2000
  • This paper presents a digital controller for three-phase Boost Converter. Generally, the conventional Space-Vector Pulse Width Modulation (SVPWM) have complex computation. Thereby, it should be implemented with high performance processor. In order to reduce calculation burden of the conventional SVPWM, digital controller which has a simplified SVPWM algorithm is designed in this study. A proposed digital controller consists of fuzzy pwm controller and prediction controller. In simulations and experiments, the proposed digital controller is validated.

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MOBILE WIMAX 기반 향상된 다중 안테나 시스템의 고정소수점 설계

  • Kim, Hak-Min;Ahn, Chi-Young;Yun, Yu-Suk;Jung, Jae-Ho;Choi, Seung-Won
    • 한국정보통신설비학회:학술대회논문집
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    • 2008.08a
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    • pp.409-413
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    • 2008
  • In this paper, we introduce a platform of advanced multiple antenna system based on orthogonal frequency-division multiplexing (OFDM). The advanced multiple antennas have beamforming gain using array antenna. In array antenna systems, received signal has phase delay caused distance of each antennas, therefore it should compensate with optimum weight vector which calculated by Lagrange algorithm. To implement the presented above procedures using Digital Signal Processor (DSP), we should fixed-point design. The performance of implemented platform is verified through MATLAB$^{(R)}$ simulations with various signal environments.

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