• Transactions of the Korean Society of Mechanical Engineers A
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• v.32 no.5
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• pp.437-443
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• 2008

In this paper, analysis and control of the flexible multibody system using MATLAB is presented. The equations of motion of a flexible body are derived in terms of the modal coordinate. The rigid-flexible multibody dynamic solver is developed. Finite element information required to analyze motion of flexible bodies is imported from ANSYS. The modified finite element data, such as modal mass matrix, modal stiffness matrix and constraint mode shapes, is calculated in the solver. Since the solver is developed using MATLAB, it is very easy to connect with SIMULINK which is widely used to control motion of the multibody system. Several simulations are implemented to verify the developed solver. A control example is carried out and the usefulness of the developed solver is demonstrated.

• Proceedings of the KIEE Conference
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• 2002.11d
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• pp.191-193
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• 2002

최근, 전기품질에 관한 중요성과 EMI에 의한 규정이 강화되면서 PFC 컨버터에 관한 연구가 많이 이루어지고 있다. 본 연구에서는 matlab을 활용하여 3상 PFC 컨버터를 효율적으로 시뮬레이션하는 연구를 수행한다. 단위역률을 위한 3상 컨버터 PFC 제어는 링크전압제어부, 전류제어부, SVPWM 제어부로 구성된다. 3상 PFC 컨버터를 matlab/simulink로 구성하여 시뮬레이션을 수행한 결과. 상전압과 상전류의 위상이 일치하여 단위역률이 잘 실현됨을 나타내고 있다. 본 연구는 PFC 컨버터의 설계 및 유사회로의 시뮬레이션에 유용하게 활용될 것이다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.18 no.3
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• pp.643-650
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• 2014

A hardware implementation of phase calculator for extracting 3D depth image from TOF(Time-Of-Flight) sensor is described. The designed phase calculator adopts redundant binary number systems and a pipelined architecture to improve throughput and speed. It performs arctangent operation using vectoring mode of DCORDIC(Differential COordinate Rotation DIgital Computer) algorithm. Fixed-point MATLAB simulations are carried out to determine the optimal bit-widths and number of iteration. The phase calculator has ben verified by FPGA-in-the-loop verification using MATLAB/Simulink. A test chip has been fabricated using a TSMC $0.18-{\mu}m$ CMOS process, and test results show that the chip functions correctly. It has 82,000 gates and the estimated throughput is 400 MS/s at 400Mhz@1.8V.

• Transactions of the Korean Society of Automotive Engineers
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• v.13 no.3
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• pp.110-116
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• 2005

Linear dynamic simulations with one and two degrees of freedom were built from SIMULINK in MATLAB commercial program. Before starting the simulations, initial conditions and system parameters which are mass, spring constant and coefficient of damping are easily inputted by user through each pop-up window, and the conditions for the simulation including time step, analysis methodology and so on can be modified with ease. Also, as soon as the simulations are started, the windows for animations which shows deformed motions dynamically with real time are popped-up and the graphical results are shown in time and frequency domains, simultaneously, The results of the simulations were verified through some examples of textbooks of mechanical vibrations. It was found that the programs would help us to solve any kind of linear dynamic simulation for one and two degrees of freedom.

• Proceedings of the KIEE Conference
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• 2006.07b
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• pp.625-626
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• 2006

This paper presents the new simulation model for the performance analysis of Surface-Mounted Permanent Magnet Synchronous Motor(SMPMSM) Drive System which is integrated with a controller and a power converter. To enhance reusability and compatibility, the system model is expressed by the association of independent sub-modules reflecting the real physical construction. This concept allows another independent sub-module to be effectively inserted in the model for the comprehensive analysis of larger systems such as a Machine Tool and HEV. The developed model which is composed of MATLAB/Simulink's basic blocks can rapidly analyze not only the entire behavior of system, but also the functional relationship between each components for the effective development of controller.

• Proceedings of the KIEE Conference
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• 2000.07b
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• pp.1190-1192
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• 2000

전동기의 속도 및 토크제어 운전시 인버터 제어 방식으로서 최대 효과적인 전력을 사용할 수 있으며 저차 고조파를 저감시키는데 효율적인 스위칭방식으로 공간전압벡터 변조(SVPWM)를 사용하고 있다. 따라서 많은 논문들이 SVPWM의 방식을 이용한 시뮬레이션을 하게 되는데, 본 논문에서는 최근 시뮬레이션에 많이 사용되고 있는 Matlab/Simulink를 이용하여 SVPWM 인버터를 구현, 이를 유도전동기 구동시스템에 적용하여 속도 및 토오크 응답, 상전류 파형을 시뮬레이션 결과를 제시하여 본 논문에서 제안한 SVPWM 인버터의 블록 모델의 유효성을 보이고 있다.

• Transactions of the Korean Society of Automotive Engineers
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• v.13 no.4
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• pp.105-112
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• 2005

Analyses of dynamic models which were one and two degrees of freedom, and had the nonlinear springs and dampings with certain polynomial functions were performed from SIMULINK in MATLAB. Those consisted of 12 programs and were built on the basis of the preceding programs fur the linear dynamic simulations. However the programs for the nonlinear simulations were quite different from those f3r the linear ones, and showed the results of the analyses in real time with animating. It was found that the programs would help us to solve any kind of nonlinear dynamic simulation with one and two degrees of freedom. Especially, the simulations for 1 DOF system with cubic nonlinear spring farce showed the results for Duffing's equation, of which phenomena were jump-up and jump-down. It will be applied to the dynamic simulation of the car seat vibration with a passenger, of which model has the equivalent nonlinear springs and is two degrees of freedom.

• The Transactions of the Korean Institute of Power Electronics
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• v.12 no.1
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• pp.19-26
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• 2007

This paper presents a precision position control of induction motor using disturbance observer to reduce disturbance effects. It shows that proposed algorithm is strong in induction motor precision control for disturbance change. This system with disturbance observer using deadbeat control, which has high benefit, is good for quick disturbance compensation. To show this effectiveness the whole process is simulated by simulink, and also experimented by DSP6416 with TCP-IP network board.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.745-747
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• 2014

본 논문에서는 OFDM 기반 무선 백홀 시스템에 적용 할 수 있는 채널 추정 및 $2{\times}2$ MIMO 알고리즘을 VHDL로 구현하여, 무선 백홀 시스템용으로 제작한 보드의 FPGA에서 신호 검출 성능을 검증한다. 이를 위해, 먼저 매틀랩(Matlab) simulink를 이용하여 채널 추정 및 $2{\times}2$ MIMO 알고리즘을 floating-point와 fixed-point 모델로 설계하여 성능을 검증하고, 그 다음 Modelsim을 이용하여 VHDL로 구현한다. 구현된 알고리즘의 성능 검증을 위해 설계한 simulink 모델, Modelsim 시뮬레이션, ISE Chipscope, 그리고 오실로스코프로 측정한 결과들을 비교한다. 비교결과, Modelsim 시뮬레이션, ISE Chipscope, 그리고 오실로스코프로 측정한 결과들이 서로 동일함을 확인하였으며, simulink 모델의 결과와는 약간의 오차를 보임을 확인하였다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2012.10a
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• pp.503-504
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• 2012