• Journal of the Korean Society for Aeronautical & Space Sciences
• /
• v.41 no.10
• /
• pp.805-812
• /
• 2013

The operational flight program(OFP) which has the functions of I/O processing with avionics, flight control logic calculation, fault diagnosis and redundancy mode is embedded in the flight control computer of Smart UAV. The OFP was developed in the environment of PowerPC 755 processor and VxWorks 5.5 real-time operating system. The OFP consists of memory access module, device I/O signal processing module and flight control logic module, and each module was designed to hierarchical structure. Memory access and signal processing modules were verified from bench test, and flight control logic module was verified from hardware-in-the-loop simulation(HILS) test, ground integration test, tethered test and flight test. This paper describes development environment, software structure, verification and management method of the OFP.

• Journal of Satellite, Information and Communications
• /
• v.8 no.1
• /
• pp.54-60
• /
• 2013

The need for high performance of on-board computer (OBC) is essential due to the growing requirements and diversified missions, and so OBC has been developed on the basis of the standard design and reconfigurable modularization in order to improve the utilization of OBC for different missions. The processor in OBC of next generation satellite which is currently developed by KARI is adopted the LEON2-FT/AT697F processor based SPARC v8 as main processor and controls various devices such as SpaceWire, MIL-STD-1553B and CAN through PCI on the standardized communication chips. This paper presents the architecture and design of system software for LEON2-FT processor based on PCI, and development of PCI software component. Also it describes the porting of VxWorks 6.5 for LEON2-FT and the test under the simulation environment for LEON2-FT and PCI with communication chips.

• Aerospace Engineering and Technology
• /
• v.7 no.1
• /
• pp.83-90
• /
• 2008

The next generation LID satellite has 64KB PROM which contains the boot loader and the monitor software, and two 4MB NVMEMs which are used for flight software storage. The boot loader has two operation modes which are the flight software mode and the monitor mode. In the flight software mode, it checks CRC checksum of selected NVMEM and copies flight software image from NVMEM to RAM And then it starts VxWorks RTOS in RAM, creates flight software tasks, and starts execution of flight software. In the monitor mode, it activates monitor software which performs NVMEM reprogramming and board-level testing on the ground. This paper is to present the design of Boot ROM software and verification method using simulator.

• Journal of Advanced Navigation Technology
• /
• v.27 no.4
• /
• pp.429-435
• /
• 2023

The increasing complexity of avionics systems has emphasized the portability and reusability of software components. In this paper, a structural design method for IOSS (Input Output Service Segment) and TSS (Transport Service Segment) complying with the FACE (The Future Airborne Capability Environment) standard in the VxWorks 653 operating environment that satisfies ARINC 653 requirements is described. IOSS and TSS operate independently in different partitions to minimize time/space separation and the influence of other software, and to increase portability and reusability, strategy patterns among design patterns are applied. In addition, IOSS provides external interface service by applying distributed IO service structure, and among external interfaces, the ARINC 664 P7 interface of FACE-compliant equipment is placed in TSS to optimize the data movement path.

• Journal of the Korean Society for Aeronautical & Space Sciences
• /
• v.31 no.5
• /
• pp.124-133
• /
• 2003

We propose an application of the Object-Oriented design methodology to develop operational flight program(OFP) for stores management computer(SMC) which manages and controls stores inventory, stores activation, launch for missiles, and release of the conventional weapons. For the development of SMC, a military version of PowerPC 603e is used as a central processing unit board and VxWorks real-time operating system is used. The Tornado software development environment(SDE) and the programming language Ada95 are used for OFP development. We design three layerd in the OFP for the independency of the software modules. An avionics system computer(ASC) simulator and a test bench are developed for the SMC integration test and verification test. And the tests are rigorously and successfully conducted.

• Proceedings of the KIEE Conference
• /
• 2006.10c
• /
• pp.512-514
• /
• 2006

본 논문의 목표는 디지털 방송 수신과 아날로그 방송 수신 및 방송 컨텐츠를 녹화, 저장, 재생이 가능할 뿐만 아니라 각종 멀티미디어 컨텐츠를 즐길 수 있고, 양방향 데이터 방송이 가능하며, 저장된 콘텐트를 스트리밍으로 개인 멀티미디어 플레이어로 스트리밍 이 가능한 다기능 일체형 개인 녹화기를 개발하는 것이다. 고품질 디지털 방송과 기존의 아날로그 방송을 고품질의 디지털 컨텐츠로 변환하여 저장하고, 이를 원하는 시점에 언제든지 볼 수 있을 뿐만 아니라 인터넷 접속하여 어디 서든지 개인 형 멀티미디어 플래이어를 이용하여 스트리밍으로 저장된 컨텐츠를 즐길 수 있다. 이러한 기능을 수행하기 위하여 상당한 성능의 MPU가 필요로 하게 된다. 본 논문에서는 이러한 조건을 만족시키기 위하여 Zoran의 G9Ellite라는 SOC를 채택하였다. 개발된 시스템을 테스트하기 위하여 현재 각 방송사들의 방송을 수신하고 요구된 기능을 테스트 하였다.

• Electronics and Telecommunications Trends
• /
• v.21 no.1 s.97
• /
• pp.1-13
• /
• 2006

임베디드 시스템이라 함은 우리가 생활하는 주변에서 흔히 접할 수 있고, 얘기만 들어도 쉽게 이해할 수 있는 PDA, 스마트폰, MP3 플레이어, 셋톱박스 등의 정보가전 기기들을 비롯하여 로봇, 텔레매틱스, 공장자동화, 군사기기와 센서노드에 이르는 디지털기기들에 컴퓨터가 내장되어 들어가 있는 시스템을 의미한다. 이러한 임베디드 시스템에 사용되는 임베디드 운영체제는 VxWorks, VRTX, pSOS, QNX와 같은 전용 RTOS에만 의존해 왔으나, 최근의 발전된 하드웨어와 네트워크 인프라로 인하여 보다 낮은비용으로 쉽고 빠르게 개발하며 범용으로 사용될 수 있는 임베디드 리눅스를 활용하는사례가 늘어나고 있는 추세에 있다. 이렇게 각광 받기 시작하는 임베디드 리눅스의 커널 기술과 관련한 대표적 관련 기술에 대해 설명한다.

• Proceedings of the KIEE Conference
• /
• 1992.07a
• /
• pp.422-424
• /
• 1992

In this paper, we are designed a hierachical system controller and builed a robot system for high precision assembly consisting in multi-arms and multi-sensor. For the control of a multi-arms robot system, the robot system are consisted of cell controller, station controller and device. The Operating System of a cell controller is VxWorks for real-time multi-processing. Using by C-language, we are proposed a multi-arms robot control language based a RCCL, and this control language is partially implemented and tested in multi-robot control system.

• 제어로봇시스템학회:학술대회논문집
• /
• 2001.10a
• /
• pp.140.4-140
• /
• 2001

This paper presents the duplex controller operated as master slave for Self Excited Static Type excitation system and the results of operation for duplex digital excitation system. Software is made up duplex multi-tasking control algorithm which is based on VxWorks(real-time OS), preprocessing algorithm for input-output signal, BSP & Device Driver for interfacing hardware and software, and OIS(Operator Interface Station) program, HMI S/W. Master controller and slave controller intercommunicate dominant data to minimize bump when controller switchover from master to slave occurs. Communication between master controller and slave controller is duplicated and communication between OIS and controller is duplicated. Hardware is made up VMEBUS based controller which is designed with PPC & I/O board ...

• 제어로봇시스템학회:학술대회논문집
• /
• 1992.10a
• /
• pp.714-717
• /
• 1992

An intelligent robot control system is developed, which is based on extensible hardwares and softwares. The system could be used to test advanced and complex real time application programs to avoid constraints on present robot control system in executing a complex or precise algorithms, due to the limitation of hardware and software. In this paper we used the RCCL(Robot Control C Library) on SUN4 as a supervisory system that plays the path planning and man-machine interface. And we used VxWORKS as a real time OS on a VME bus CPU equiped with some interface boards. Two systems were connected through the Ethernet network. We used the 4 axis manipulator, FARA, developed by Samsung Electronics Co.