• Title, Summary, Keyword: Realtime Embedded System

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Implementation of Improved safety and reliability Embedded system using Backup and Restore of TMR Architecture (TMR 구조에서의 백업과 복원을 활용한 안정성 및 신뢰성 향상 임베디드 시스템 구현)

  • Park, Joo-Yul;Lee, Jun-Hwan;Kim, Hyo-Sang;Kim, Bong-Taek;Chung, Ki-Seok
    • Proceedings of the KSR Conference
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    • pp.188-194
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    • 2011
  • The purpose of this paper is to explain the implementation method in order to enhance stability and reliability of embedded system. In this research, Texas Instrument (TI)'s TMS570 MCU(Micro Controller Unit) is used to satisfy the standard of stability that is IEC 61508. IEC 61508 suggest SIL(Safety Integrity Level) from 1 to 4 and TMS570 is satisfied SIL3. Also, TMS570 can provide several stability functions can be used in realtime system. To use such functions, this paper suggest the solution about the defect that can be used in realtime system. In basic way TMR(Triple Modular Redundancy) suggested in addition to explain about the way to improve safety and reliability. Also this paper will suggest the method that reinforce the stability of calculation by using multiplex voter and memory.

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Implementation of an Image Board Remote Control System using PDA based on Embedded Linux in Wireless Internet (무선 인터넷 망에서 임베디드 리눅스 기반 PDA를 이용한 영상보드 원격 제어 시스템 구현)

  • Kim, Sung-Yong;Lee, Sang-Min
    • The Journal of Information Systems
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    • v.17 no.1
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    • pp.155-171
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    • 2008
  • This thesis proposed a method that connecting step motor to image send board which can acquire image to move and remote controlling via streaming image board of PDA(personal digital assistant) based on embedded Linux which is using wireless network There are three embedded Linux system to embody movable image send board. First, though the wireless network a signal of PDA is transmitted to the board which has embedded Linux and a system which is controlled by the expansion I/O port of the board. Second, it's a system streaming realtime image at a PDA which has embedded Linux. The last is a system which controls a process of image board using TCP/IP communication and image send board at PC. These are the system which can use industrial settings and homes. It can also make use of an embodiment method about travelling image robot.

Expanded Petri-Net Modeling for Real Time Embedded System Context-awareness Service (실시간 임베디드 시스템 상황 정보 서비스를 위한 확장된 Petri-Net 모델링)

  • Yang, Seung-Weon;Lee, Jae-Bong
    • The Journal of the Korea Contents Association
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    • v.11 no.1
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    • pp.16-25
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    • 2011
  • Some context is characterized by a single event in computing environment, but many other contexts are determined by a lot of things which occur with a space and a time. The Realtime Embedded System context-awareness service that interacts with the physical space can have property such as time. The exceptional behaviors of the system that interact with physical space can result in critical damage and cause danger to the operation of an embedded system. we propose an approach which should include spatio-temporal property and exceptional management in the context model, and verify its effectiveness using an expanded Petri-Net. The context-awareness service modeling of an embedded system is discussed the properties of model such as basic Petri-Net, patterned Petri-Net, or Spatio-temporal Petri-Net for the exceptional behaviors of the system. The proposed methodology demonstrated using an example that is emergency medical service. The use of expanded Petri-Net will contribute not only to develop the application but also to model the spatio-temporal context awareness for the exceptional handling.

An Improved Task Scheduling Algorithm for Efficient Dynamic Power Management in Real-Time Systems (실시간 시스템에서 효율적인 동적 전력 관리를 위한 태스크 스케줄링 알고리듬에 관한 연구)

  • Lee Won-Gyu;Hwang Sun-Young
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.31 no.4A
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    • pp.393-401
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    • 2006
  • Energy consumption is an important design parameter for battery-operated embedded systems. Dynamic power management is one of the most well-known low-power design techniques. This paper proposes an online realtime scheduling algorithm, which we call energy-aware realtime scheduling using slack stealing (EARSS). The proposed algorithm gives the highest priority to the task with the largest degree of device overlap when the slack time exists. Scheduling result enables an efficient power management by reducing the number of state transitions. Experimental results show that the proposed algorithm can save the energy by 23% on average compared to the DPM-enabled system scheduled by the EDF algorithm.

Vetronics Design Using Realtime Integrated Control Techniques (실시간 통합제어기법을 이용한 차량전자화 설계)

  • Lee, Seok-Jae;Min, Ji-Hong;Lyou, Joon
    • Journal of the Korea Institute of Military Science and Technology
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    • v.11 no.3
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    • pp.89-98
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    • 2008
  • The vetronics is necessarily required for enhancement of the operational capability and optimization of the system architecture. In this paper, we presents the realtime control methods for the vetronics of the fighting vehicles. We proposed the data distribution based on standard bus and computer resource for realtime and integrated control of the system. Embedded computers are designed considering extensibility and reliability of the system. The integrated display improves the operator's capability. We applied the network centric battle management and digital power control with intelligent switching elements to increase cooperated combat efficiency and reliability. To show the feasibility of the presented design schemes, the vetronics has been implemented and applied to a real fighting vehicle.

A Study on Wireless Sensor Node Control Using Embedded System (임베디드 시스템을 활용한 무선 센서노드 제어에 관한 연구)

  • Choi, Sin-Hyeong;Han, Kun-Hee
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.8 no.5
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    • pp.1141-1145
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    • 2007
  • Rapid development of high-micro device design and wireless mobile communication technique enables each information instrument and devices to form intelligent network. The discussion of ubiquitous computing that provide information when and where desired is advanced actively. Information collected through ubiquitous sensor network assists it will be able to provide a convenient and accurate service. In this paper, we design and implement system which shows in realtime through TFT/LCD display device sensing data transmitted in embedded system instead of host pc.

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Safety Assessment of Train Control System Software (열차제어시스템 소프트웨어 안전성 평가기법)

  • Han, Jae-Joong;Cho, Byung-Tae;Hwang, Jong-Gyu;Jo, Hyun-Jeong;Kim, Hyung-Shin
    • Proceedings of the KSR Conference
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    • pp.272-279
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    • 2007
  • Recently, train control system is adopting computer system replacing mechanical system and its software is taking more responsibility than ever. Train control system software is a safety-critical embedded software with realtime and high reliability requirements. In this paper, we propose a safety assessment method for the train control system software. We review characteristics of train control system software and analyze related international software safety standards to derive requirements for safety assessment. Testing tools used for embedded software are surveyed to find a feasible safety assessment architecture. The proposed safety assessment method is to use safety activity results generated during development processes and feed them to the runtime embedded software testing tool.

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A Design and Implementation of LBS-based Tour Guide System using Embedded Linux (임베디드 리눅스를 이용한 위치기반 관광안내 단말기의 설계 및 구현)

  • Kim Jeong-Won;Jun Bong-Gi
    • Journal of the Korea Society of Computer and Information
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    • v.11 no.4
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    • pp.261-269
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    • 2006
  • In this paper we has implemented a tour guide terminal using the embedded linux. The implemented terminal can locate its position using GPS interface and display the sightseeing information of the current location. With view of this implementation results, we confirmed the possibility of embedded linux terminal as a tour guide PDA. The realtime update of sightseeing information using a mobile communication functionality will be included in our future works.

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An Implementation of Automotive Parking Assistance System using Qplus-Auto OSEK Edition

  • Son, Jeongho;Kim, Jong Hyo;Ha, Soo Young;Kwon, Kee-Koo
    • IEMEK Journal of Embedded Systems and Applications
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    • v.8 no.2
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    • pp.103-109
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    • 2013
  • Traditional implementation schemes for automotive electronic control units look simple, but the tradition schemes need so many coarse works to satisfy the user requirements regarding time constraints whenever their microprocessors are changed. Recently, a movement toward using middle-wares, such as OSEK operating system, has risen in automotive industry. In this paper, we describe how to use the features of operating systems to replace traditional firmware based softwares in points of views of services, such as multitask support, preemption, and realtime property. To show an example, we implemented a parking assistance system as a prototype.