• The KIPS Transactions:PartC
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• v.16C no.6
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• pp.747-752
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• 2009

The AUTOSAR(AUTOmotive Open System ARchitecture) is an open software platform for automotive. The AUTOSAR contains the modules of FlexRay that is the next generation automotive network protocol. We have developed the modules including FlexRay State Manager, FlexRay Transport, FlexRay Interface, FlexRay Transceiver Driver and FlexRay Driver based on the standard of the module. This thesis presented not only the result of development but the result of design and implementation. And the developed modules were ported to the microcontroller board and verified.

• Proceedings of the IEEK Conference
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• 2001.09a
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• pp.849-852
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• 2001

본 눈문에서는 뒤틀림, 응력, 압력[1], 토크, 가속도 등의 물리적인 동적 현상을 측정하여 수집된 데이터를 처리하기 위한 신호처리(Signal Processins) 기능이 결합되어 넓은 용도로 활용할 수 있는 센서 신호 수집 시스템을 구현하였다. 구현된 시스템은 data acquisition board 의 하드웨어와 소프트웨어로 나누어 볼 수 있다. 하드웨어의 구성은 아날로그부, 디지털부, 그리고 시스템 인터페이스 처리부로 되어 있다. 아날로그부에서는 센서신호를 받아서, PGA (Programmable Gain Amplifier)[2]와 Op-Amp를 사용하여 signal conditioning 처리하여 8차 Lowpass Filter 로 보낸다. Filtering 된 신호는 ADC (Analog to Digital Converter) 가 내장되어 있는 PIC(3) microcontroller로 보내져 AD변환과 디지털 신호 처리를 한다. 처리된 신호는 RS232 인터페이스를 통해 호스트 컴퓨터로 보내 사용자가 분석할 수 있도록 한다. 또한 LCD display 실시간으로 확인, 분석할 수 있으며 동시에analog output에서 센서신호의 특징을 분석 할 수 있도록 한다.

• Journal of Power Electronics
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• v.16 no.4
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• pp.1504-1512
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• 2016

This paper presents a new single-phase asymmetrical cascaded multilevel DC-link inverter. The proposed inverter comprises two stages. The main stage of the inverter consists of multiple similar cells, each of which is a half-bridge inverter consisting of two switches and a single DC source. All cells are connected in a cascaded manner with a fixed neutral point. The DC source values are not made equal to increase the performance of the inverter. The second circuit is a folded cascaded H-bridge circuit operating at a line frequency. One of the main advantages of this proposed topology is that it is a modular type and can thus be extended to high stages without changing the configuration of the main stage circuit. Two control schemes, namely, low switching with selective harmonic elimination and sinusoidal pulse width modulation, are employed to validate the proposed topology. The detailed approach of each control scheme and switching pulses are discussed in detail. A 150W prototype of the proposed system is implemented in the laboratory to verify the validity of the proposed topology.

• Proceedings of the KIPE Conference
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• 2004.07b
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• pp.587-591
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• 2004

This paper proposes a novel current compensation technique that can eliminate the harmonic currents included in line currents without computation of harmonic current components. A current controller with fast dynamics for an active filter is described. Harmonic currents are directly controlled without the need for sensing and computing the harmonic current of the load current, thus simplifying the control system. Current compensation is done in the time domain, allowing a fast time response. The DC voltage control loop keeps the voltage across the DC capacitor constant. High power factor control by an active filter is described. All control functions are implemented in software using a single-chip microcontroller, thus simplifying the control circuit. Any current-controlled synchronous rectifier can be used as a shunt active filter through only the simple modification of the software and the addition of current sensors. It is shown through experimental results that the proposed controller gives good performance for the shunt active filter.

• Journal of the Korean Institute of Telematics and Electronics B
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• v.33B no.2
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• pp.217-226
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• 1996

Switched reluctance motor (SRM) drives appear today as viable alternatives to induction and brushless motor drives in a wide range of application such as machine tools, fans, and pumps. This paper deals with a new converter topology which can be used in order converter. The split source type converter consists of minimum switching devices to be used in switched reluctance motor (SRM) drive. In this proposed converter two switches and six diodes are added to split source type converter. The proposed converter has performance minimizes the negative torque, Which puts the phase current off by double impressed voltages. The major advangtage of this converter is the increase of the average output power while improving better converter efficiency in heavy load and high speed than other topologies. The proposed converter system has been implemented using 80C196KB microcontroller and experiments were carried out ot verify the simulation results.

• Journal of Digital Convergence
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• v.12 no.12
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• pp.257-264
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• 2014

Through MCU model, Radio Frequency communication is completed using universal asynchronous receiver and transmitter. The communicatin with PC and MCU is completed using RS-232 cable. At first interconnected communication with PC and MCU is necessary for RF communication because tha UART is based technique for RF communication. Program imbeded in microcontroller unit is ran during RF signal is transmitted to other RF module. Data connected with PC and MCU is transmitted between PC and MCU during PC and MCU is connected.

• Proceedings of the IEEK Conference
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• 2008.06a
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• pp.633-634
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• 2008

In this paper, we describe implementation of a network Speaker for easily read streaming audio data from the network. The Network Speaker uses MAXIM company's DS80C400 for network control and MAX542 for audio data play. The DS80C400 network microcontroller offers TCP IPv4/6 network stack with the TINI-OS provided in ROM. The TINI-OS is adopted as an embedded operating system. Application programs are implemented by using JAVA language.

• JSTS:Journal of Semiconductor Technology and Science
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• v.13 no.5
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• pp.451-458
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• 2013

This paper describes a design of LIN MCU using efficient memory accessing architecture which provides concurrent data and address fetch for faster communication. By using slew rate control it can reduce EMI emission while satisfying required communication specifications. To verify the efficiency of the LIN MCU, we developed a SoC and tested for several data packets. Measurements show that this LIN MCU improves network efficiency up to 17.19 % and response time up to 31.26 % for nominal cases. EMI radiation also can be reduced up to 10 dB.

• 제어로봇시스템학회:학술대회논문집
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• 1990.10a
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• pp.135-139
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• 1990

In general, the control of robot arms falls into two board categories (position control and force control). The joint interpolated trajectory schemes generally interpolate the desired joint path by a class of polynomial functions and generate a sequence of time based control set points for the control of a manipulator from a initial location to its destination. A digital position controller was designed and adapted to the industrial balancing manipulator. And also, the joint interpolated trajectory using 3rd order polynomial was generated in this study. The IBM PC used as the main controller and the trajectory planner had enough run-time capabilities. The 8097BH microcontroller is an integral pan of the joint controller which directly controls an axis of motion. The PI servo control system to treat each joint of the robot arm as a independent joint servo mechanism had satisfying performance, and a sequence of time-based intermediate configurations of the manipulator hand showed good continuity and smoothness on position and velocity of the manipulator's joint coordinates along the trajectory.

• Journal of IKEEE
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• v.22 no.3
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• pp.878-881
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• 2018

In this paper, experiments through performance evaluation under real operation environment were conducted. Transceiver and microcontroller shows the characteristics for the amount of current consumption and software protocol was optimized by controlling the time of Report Attribute and electric current level. To reduce current consumption when using battery, with designing transmission of the same amount of data as soon as possible, power consumption efficiency was enhanced.