Transformer real-time reliability model based on operating conditions

Operational reliability evaluation theory reflects real-time reliability level of power system. The component failure rate varies with operating conditions. The impact of real-time operating conditions such as ambient temperature and transformer MVA (megavolt-ampere) loading on transformer insulation life is studied in this paper. The formula of transformer failure rate based on the winding hottest-spot temperature (HST) is given. Thus the real-time reliability model of transformer based on oper- ating conditions is presented. The work is illustrated using the 1979 IEEE Reliability Test System. The changes of operating conditions are simulated by using hourly load curve and temperature curve, so the curves of real-time reliability indices are ob- tained by using operational reliability evaluation.

The Design of I/O Subsystem in Satellite Real-Time Microkernel Operating System

One of the most important features of modern minor satellites is to realize autonomous moving. The performance of the satellite autonomous computer operating system acting as the control center is utmost important. The recent trend in operating system development is adopting microkernel architecture which holds such advantages as microminiaturization, modularity, portability and extendibility. The performance of I/O subsystem is currently receiving considerable research attention. Object-orientation offers an approach to application development in which software system can be constructed by composing and refining the pre-designed plug-compatible software components.It also starts with some basic notions fairly well accepted in computer science, namely encapsulation and reuse. In this paper, a new object-oriented real-time I/O subsystem model has been designed.In this model, the traditional I/O subsystem framework is discarded and a stream mechanism based on the object-oriented concept is introduced. In addition, the I/O requests are classified according to their time emergency to obtain real-time performance. So, this model meets such satelliteperformance requirements as reliability, flexibility, portability and real-time performance.

Digital arc welding power supply based on real-time operating system

A digital arc welding power supply was designed with the advanced reduced instruction set computer machine （ARM） and embedded real-time multi-task operating system micro C/OS- Ⅱ. The ARM, with its powerful calculating speed and complete peripheral equipments, is very suitable to work as the controller of the digital power supply. The micro C/OS- Ⅱ transplanted in ARM, helps to improve the respondent speed against various welding signals, as well as the reliability of the controlling software. The welding process consists of nine tasks. The tasks of great significance on reliability of the welder, for example, the A/D conversion of current and voltage, enjoy top priority. To avoid simultaneous-sharing on A/D converter and LCD module, two semaphores are introduced in to ensure the smooth performance of the welding power supply. Proven by experiments ,the ARM and the micro C/OS- Ⅱ can greatly improve both the respondent speed and the reliability of the digital welder.

A Smart Phone-oriented Embedded Real-time Operating System

This article presents an embedded Smart Phone Operating System (SPOS) independently designed by ZTE Corporation. The SPOS is based on single kernel architecture with its multi-task real-time kernel supporting hardware platforms and resources of mainstream mobile phones. It has remarkable advantages such as highly efficient and dynamic power management, priority - based preemptive scheduling, fast startup, a variety of drivers, and excellent system stability and operability. For the development of upper layer communication protocols and application software, the SPOS provides wireless communication interfaces and the application program framework.

Low-Power Operational Amplifier for Real-Time Signal Processing System of Micro Air Vehicle

A low-power complementary metal oxide semiconductor（CMOS） operational amplifier （op-amp） for real-time signal processing of micro air vehicle （MAV） is designed in this paper.Traditional folded cascode architecture with positive channel metal oxide semiconductor（PMOS） differential input transistors and sub-threshold technology are applied under the low supply voltage.Simulation results show that this amplifier has significantly low power,while maintaining almost the same gain,bandwidth and other key performances.The power required is only 0.12 mW,which is applicable to low-power and low-voltage real-time signal acquisition and processing system.

Real-Time Operation of Microgrids

Microgrid (MG) systems effectively integrate a generation mix of solar, wind, and other renewable energy resources. The intermittent nature of renewable resources and the unpredictable weather conditions contribute largely to the unreliability of microgrid real-time operation. This paper investigates the behavior of microgrid for different intermittent scenarios of photovoltaic generation in real-time. Reactive power coordination control and load shedding mechanisms are used for reliable operation and are implemented using OPAL-RT simulator integrated with Matlab. In an islanded MG, load shedding can be an effective mechanism to maintain generation-load balance. The microgrid of the German Jordanian University (GJU) is used for illustration. The results show that reactive power coordination control not only stabilizes the MG operation in real-time but also reduces power losses on transmission lines. The results also show that the power losses at some substations are reduced by a range of 6% - 9.8%.

新版LabVIEW Communications推动5G的快速原型化新版本包含了 NI Linux Real-Time功能和MIMO、LTE和802．11应用程序框架

16．09．06‐NI （美国国家仪器公司，National Instruments ，简称NI）作为致力于为工程师和科学家提供解决方案来应对全球最严峻的工程挑战的供应商，宣布推出LabVIEW Communications系统设计套件2．0这一个专门用于无线通信系统原型开发的设计环境。新版本增加了NI Linux Real‐Time 功能，适用于所有软件定义无线电（SDR）产品，包括NI USRP RIO 和FlexRIO 。新增的功能可帮助工程师开发在 NI Linux Real‐Time 操作系统上运行实时算法，并与其他工具搭配使用，将协议栈上移到M AC层和网络层，同时访问搭建完整系统原型所需要的庞大的开源工具和技术库，系统原型的搭建是推进5G 项目的关键。

风河公司取得FSM实验室Hard Real-Time Linux技术

设备软件优化（DSO）厂商风河系统公司日前宣布．风河已取得由FSM实验室（Finite State Machine Labs．Inc,FSMLabs）开发的设备软件业界惟一的商用级“硬”实时（hard real-time）Linux技术——RTLinux。风河公司此次获得了该项技术的全套知识产权．包括专利权，著作权、商标注册和其他相关产品的所有权。

高职“Linux操作系统”课程建设与实践

以高职“Linux操作系统”课程为例,以专业教师、思政教师与企业导师相互配合,组建高素质结构化教学团队、建设“双师型”教师队伍为基础,以开发校企合编新型活页式教材、在线课程和数字化实训室等数字资源为载体,依托校企共建的“华为信息与网络技术学院”“北斗导航协同创新中心”,融入“云、大、物、智”等新一代信息技术,采用任务驱动、理实一体、行动导向教学理论开展教学。应用研究表明,课程实施教师、教法、教材的“三教”改革对培养学生的知识、技能、素质等方面有明显的促进作用,有效达成了人才培养既定教学目标。

高职专业群共享课程的改革与实践——以“Linux操作系统”课程为例

本文以健康信息服务专业群“Linux操作系统”课程为例,分析专业群共享课程针对群内各专业的培养目标以及该课程作为专业群共享课程的课程特点,从课程教学的改革思路、课程内容的提取与分配、特色教材的开发、课程资源的建设、教学方法的配套等方面阐述专业群共享课程的建设实践,以期为高职院校信息类专业群共享课程建设提供参考。

基于Linux系统多课程融合的教学方法研究

Linux系统作为各种系统、应用软件的开发和支撑平台,在计算机学科体系中发挥了非常基础的作用,是后续多门专业课程的先修课程。为了培养计算机专业学生的实践和创新能力,提升学生整体素质,将“Linux系统管理与编程环境”与多门专业课程进行融合,并通过设计具有生产性、实践性的教学案例来提升学生学习积极性,使课程更具“高阶性、创新性、挑战度”,体现了突出以学生为中心,注重能力培养的教学模式。

A Concept of Dynamically Reconfigurable Real-time Vision System for Autonomous Mobile Robotics

This paper describes specific constraints of vision systems that are dedicated to be embedded in mobile robots. If PC-based hardware architecture is convenient in this field because of its versatility, flexibility, performance, and cost, current real-time operating systems are not completely adapted to long processing with varying duration, and it is often necessary to oversize the system to guarantee fail-safe functioning. Also, interactions with other robotic tasks having more priority are difficult to handle. To answer this problem, we have developed a dynamically reconfigurable vision processing system, based on the innovative features of Cleopatre real-time applicative layer concerning scheduling and fault tolerance. This framework allows to define emergency and optional tasks to ensure a minimal quality of service for the other subsystems of the robot, while allowing to adapt dynamically vision processing chain to an exceptional overlasting vision process or processor overload. Thus, it allows a better cohabitation of several subsystems in a single hardware, and to develop less expensive but safe systems, as they will be designed for the regular case and not rare exceptional ones. Finally, it brings a new way to think and develop vision systems, with pairs of complementary operators.

Analysis and Comparison of Five Kinds of Typical Device-Level Embedded Operating Systems

Today, the number of embedded system was applied in the field of automation and control has far exceeded a variety of general-purpose computer. Embedded system is gradually penetrated into all fields of human society, and ubiquitous embedded applications constitute the 'ubiquitous' computing era. Embedded operating system is the core of the em-bedded system, and it directly affects the performance of the whole system. Our Liaoning Provincial Key Laboratory of Embedded Technology has successfully developed five kinds of device-level embedded operating systems by more than ten years’ efforts, and these systems are Webit 5.0, Worix, μKernel, iDCX 128 and μc/os-II 128. This paper mainly analyses and compares the implementation mechanism and performance of these five kinds of device-level embedded operating systems in detail.

MODEL-BASED DEVELOPMENT OF REAL-TIME SOFTWARE SYSTEM FOR ELECTRONIC UNIT PUMP SYSTEM

A real-time operating system （RTOS）, also named OS, is designed based on the hardware platform of MC68376, and is implemented in the electronic control system for unit pump in diesel engine. A parallel and time-based task division method is introduced and the multi-task software architecture is built in the software system for electronic unit pump （EUP） system. The V-model software development process is used to control algorithm of each task. The simulation results of the hardware-in-the-loop simulation system （HILSS） and the engine experimental results show that the OS is an efficient real-time kernel, and can meet the real-time demands of EUP system; The built multi-task software system is real-time, determinate and reliable. V-model development is a good development process of control algorithms for EUP system, the control precision of control system can be ensured, and the development cycle and cost are also decreased.

DEVELOPMENT OF AN AIRBORNE SAR REAL-TIME DIGITAL IMAGING PROCESSOR

An airborne SAR real-time digital imaging processor is presented, and its realtime digital imaging principle and main technical parameters are analyzed briefly. The system configuration and logical structure are described in detail. Finally the main features of this system and examples of imagery obtained with the system are also presented.

High performance reconfigurable hardware system for real-time image processing

A novel reconfigurable hardware system which uses both muhi-DSP and FPGA to attain high performance and real-time image processing are presented. The system structure and working principle of mainly processing multi-BSP board, extended multi-DSP board are analysed. The outstanding advantage is that the communication among different board components of this system is supported by high speed link ports ＆ serial ports for increasing the system performance and computational power. Then the implementation of embedded real-time operating systems （RTOS） by us is discussed in detail. In this system, we adopt two kinds of parallel structures controlled by RTOS for parallel processing of algorithms. The experimental results show that exploitive period of the system is short, and maintenance convenient. Thus it is suitable for real-time image processing and can get satisfactory effect of image recognition.

Influences of Network Delay on Quality of Experience for Soft Objects in Networked Real-Time Game with Haptic Sense

In this paper, we investigate the influences of network delay on QoE (Quality of Experience) such as the operability of haptic interface device and the fairness between players for soft objects in a networked real-time game subjectively and objectively. We handle a networked balloon bursting game in which two players burst balloons (i.e., soft objects) in a 3D virtual space by using haptic interface devices, and the players compete for the number of burst balloons. As a result, we find that the operability depends on the network delay from the local terminal to the other terminal, and the fairness is mainly dependent on the difference in network delay between the players’ terminals. We confirm that there exists a trade-off relationship between the operability and the fairness. We also see that the contribution of the fairness is larger than that of the operability to the comprehensive quality (i.e., the weighted sum of the operability and fairness). Assessment results further show that the output timing of terminals should be adjusted to the terminal which has the latest output timing to maintain the fairness when the difference in network delay between the terminals is large. In this way, the comprehensive quality at each terminal can be maintained as high as possible.

基于Python和Shell的《Linux实训项目自测平台》软件设计

近年来,Linux操作系统在各国不断地发展与推广,高等院校开设的Linux操作系统课程也越来越受到重视。通过对软件界面设计及在Linux操作系统中检测实训项目的几种常用方式进行分析和研究,给操作系统课程教学提供一种教学思路,同时对Linux教学辅助软件开发者提供一些借鉴和参考。

项目驱动法在Linux操作系统课程实验教学中的应用策略

随着信息技术的快速发展,Linux操作系统在教育领域的应用日益广泛。本文探讨了项目驱动法在Linux操作系统课程实验教学中的应用策略,旨在通过实际项目提高学生的实践能力和创新能力。本文阐述了项目设计需紧贴课程目标与行业需求、项目难度应循序渐进、注重项目的实用性与创新性等原则;以Samba服务配置为例,展示了项目实践的具体步骤和评估反思方法。本文将项目驱动法系统地应用于Linux操作系统课程实验教学中提供了具体的实施策略和评估方法。

基于openEuler的Linux系统应用课程实践教学设计研究

针对当前高校“Linux应用”实践课程主要采用国外的Linux操作系统平台进行教学,阻碍国产操作系统推广和发展的现状,提出基于国产操作系统openEuler的Linux应用实践教学设计方法,并给出了课程教学内容设计方案。在完成课程学习后,学生可具备一定的工程实践能力,并为后续基础课程和专业课程学习,以及进行软件开发工作,建立良好的基础。