• 한국산학기술학회논문지
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• 제9권2호
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• pp.401-414
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• 2008

무기체계 내장형 소프트웨어의 품질을 시험하는 것은 무기체계 내장형 소프트웨어의 요구에 부합되는 고품질의 시스템을 구현할 수 있도록 지원하기 위함이다. 일반적인 내장형 소프트웨어에 대한 품질평가 방법론이나 평가기법 등이 개발된 사례가 있으나 엄격한 품질 수준을 요구하는 무기체계 내장형 소프트웨어의 경우에는 아직까지 구체적인 체계가 구축되어 있지 않은 실정이다. 최근 다양한 무기체계 내장형 시스템이 개발되어 활용되고 있으나 품질확보 면에서 많은 노력이 필요한 실정이다. 본 연구에서는 무기체계 내장형 소프트웨어 평가를 위해 ISO/IEC 12119를 근간으로 하여 평가를 수행할 수 있는 평가모델과 품질검사표를 개발하여 무기체계 내장형 소프트웨어 평가에 적용할 수 있도록 하였다.

• 한국시뮬레이션학회논문지
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• 제18권4호
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• pp.81-94
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• 2009

임베디드 시스템 개발에 있어서 재사용성이나 가변성 설계에 대한 연구가 미흡한 상태이다. 임베디드 시스템의 특성 상 새로운 디바이스를 지원할 수 있도록 설계되어야 하는데, 확장성이 고려되지 않은 임베디드 시스템의 경우 재구축해야 하는 어려움이 있다. 현재 임베디드 시스템의 개발 생산성 및 재사용성이 매우 낮으며, 이런 흐름은 소프트웨어 위기와 같이 임베디드 시스템의 유지보수 비용 증가, 개발비 증가, 시스템의 품질 저하 문제에 직면하게 될 것이다. 본 논문에서는 이와 같은 임베디드 시스템의 문제를 극복하기 위한 기반을 제공하고자 임베디드 시스템의 재사용성 프레임워크를 제시한다. 이 프레임워크를 기반으로 다양한 디바이스를 동적으로 지원할 수 있는 플러그인 기법을 제안하며, 플러그인 기법의 기반이 되는 동적 메타모델를 제시한다.

• 대한임베디드공학회논문지
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• 제8권1호
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• pp.25-29
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• 2013

Recently ARM processor's processing power has been increasing rapidly as it has been applied to consumer electronics products. Because of its computing power and low power consumption, it is used to various embedded systems.( including vision processing systems.) Embedded linux that provides well-made platform and GUI is also a powerful tool for ARM based embedded systems. So short period to develop is one of major advantages to the ARM based embedded system. However, for real-time date processing applications such as an image processing system, ARM needs additional equipments such as FPGA that is suitable to parallel processing applications. In this paper, we developed an embedded system using ARM processor and FPGA. FPGA takes time consuming image preprocessing and numerical algorithms needs floating point arithmetic and user interface are implemented using the ARM processor. Overall processing speed of the system is 60 frames/sec of VGA images.

• 대한임베디드공학회논문지
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• 제12권2호
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• pp.89-96
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• 2017

We develop an embedded system to measure various sensor data, control multiple motors, and communicate with mobile devices for system managements. Choosing TI AM3359 microprocessor featuring high processing performance, low power consumption, and various I/O device support, we design and build the embedded system hardware so that it supports multiple global positioning system (GPS) and gyro sensor modules to measure precise position; multiple pulse width modulation (PWM) outputs to control multiple direct current (DC) motors; a Bluetooth module to communicate with mobile devices. Then, we port the boot loader and device drivers to the built circuit board and construct the firmware development environment for the application programming. The performance of the designed and implemented embedded system is demonstrated by real motor control test using GPS and gyro sensor data and control parameters configured by a mobile device.

• 시스템엔지니어링학술지
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• 제5권2호
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• pp.57-62
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• 2009

An embedded system is a computer system designed to perform one or a few dedicated functions often with real-time computing constraints. A traditional design process of embedded systems is the development of document-centric approach, and it is difficult to develop an embedded system efficiently because communication between teams or steps is not smooth. So the Model Based Design Process are applied to the development of embedded systems. This paper will compare the Model Based Design Process and the traditional design process, and introduce example of development of vehicle device applied the Model Based Design Process.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.2116-2120
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• 2003

A frame buffer device is an abstraction for the graphic hardware. It allows application software to access the graphic hardware through a well-defined interface, so that the software doesn’t need to know anything about the low-level interface stuff. We develop a frame buffer driver for VIA’s CLE266 graphic system based on ‘Qplus’, an embedded linux operating system developed by ETRI. Then, it will be seen that our frame buffer system is applied to embedded solutions such as movie player and X server successfully.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2004년도 ICCAS
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• pp.413-416
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• 2004

The tracking antenna system must be always pointed to a satellite for data link among moving vehicles. Especially, for an antenna mounted on a moving vehicle, it needs the stabilized the antenna system. So, software and hardware, signal processing of motion detection sensors, real-time processing of vehicle dynamics, trajectory estimation of satellite, antenna servo mechanism, and tracking algorithm, are unified in the antenna system. The purpose of this paper is to design the embedded tracking antenna control system for satellite communication. The embedded OS(Operating System) based stabilization and tracking algorithm was implemented. The performance of the designed embedded control system was verified by the real satellite communication test.

• 대한임베디드공학회논문지
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• 제8권5호
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• pp.243-248
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• 2013

Reliability evaluation is important task in embedded system. It can avoid potential failures and manage the vulnerable components of embedded system effectively. Dynamic fault tree analysis is one of the reliability evaluation methods. It can represent dynamic characteristics of a system such as fault & error recovery, sequence-dependent failures. In this paper, the steering system, which is embedded system in vehicles, is represented using dynamic fault tree. We evaluate the steering system using approximation algorithm based on Simpson's rule. A set of simulation results shows that proposed method overcomes the low accuracy of classic approximation method without requiring no excessive calculation time of the Markov chain method.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2003년도 학술회의 논문집 정보 및 제어부문 B
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• pp.653-656
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• 2003

We have designed embedded web sewer system and ported Linux operating system version 2.4.5 at our system. And then We implemented to control and monitor widely separated hardware and implemented to monitor widely separated image using CMOS image sensor HV7131B. Web server is the Boa web server with General Public License. We designed for this system using of Intel's SA1110 ARM core base processor and connecting input and output device at GPIO port of SA1110. Device driver of General purpose I/O for Embedded Linux OS is designed. And then the application program controlling driver is implemented to use of common gate interface C language. User is available to control and monitor at client PC. This method have benefit to reduce the Expenditure of hardware design and development time against PC base system and have various and capacious application against firmware base system.

• 제어로봇시스템학회논문지
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• 제9권4호
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• pp.340-346
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• 2003

Driven by the growth of the Internet and the increasing ubiquity of embedded computing systems, the embedded system is exploding in terms of it proliferation of products and the number of complex applications. Intelligent dedicated systems and appliances used in interface, monitoring, communications, and control applications increasingly demand the services of a sophisticated, state-of-the-art operating system. In the case of industrial controller, it is required to use a real-time operating system (RTOS) as a good building block to enable Internet connectivity. However, commercial RTOSes are increasingly less desirable due to their lack of standardization and their inability to keep pace with the rapid evolution of technology. In order to overcome these problems, we consider using embedded Linux and embedded web server. Availability of source code, reduced licensing, reliability, open source community support, as well as others, are key reasons for the use of embedded linux by embedded developers. In this paper, we develop embedded linux platform to control the industrial inverter with the Internet connecting feature. The method of web-based management is also proposed by using the embedded web server and Java applet. We show the feasibility of remote management for the commercial inverter controller with the proposed three-tier web-based remote management system.