Based on the investigation of analysis methods for the overvoltage striking on rotating electric machines and its research status at home and abroad , the safety forecast theory and the analysis method for the switching overvoltage of large power stations are firstly presented based on the field - circuit analysis , and the transient field distribution and the insulation condition in the stator winding insulator stricken by the switching overvoltage in large power stations are studied and analyzed on line 本文在分析和总结国内外关于旋转电机过电压分析方法及其研究现状的基础上,首次提出了基于场路结合的厂站操作过电压安全预测理论和分析方法。本文研究了大型电站中的操作过电压冲击波在发电机定子绕组绝缘介质中暂态电场的实时分布状态,在线分析发电机的绝缘工作状况,搜索发电机内部可能突发绝缘事故的区域,预测发电机内部可能发生绝缘事故的故障点,并重点研究了大型发电机绝缘安全在线预测分析方法和建立了大型发电机绝缘安全评估模型。
Based on summarized and analyzed the existing problems of the solution for scheduling rtrpmt and tft , the author constructs a new heuristic function which adequately takes predecessor and successor relation among tasks into account , targeting that the direct successor of current running task is to be given the earliest time to be run 针对实时分布系统中大量的相关周期性多任务,在分析、总结了前人对此类任务的调度算法解决方案所存在的问题基础上,构造了一种新的启发函数,该启发函数充分考虑了任务之间的前驱、后继关系,以当前任务的直接后继具有最早开始执行时间为目标。
Some important fields such as modern national defense and aviation present much higher request for the real - time and reliability of computer . the tenth - five ( year national defense pre - research pro j ect - " embedded real - time distributed system " ) requires real - time correspondence , accomplishing fault - tolerant of server ( redundance of three processors , inserting and pulling out when the processors are powered , loose synchronization among processors ) , fault - tolerant of network ( redundance of double circuit ) , fault - tolerant of tasks 现代国防、航空等重要领域对计算机的实时性和可靠性提出了更高的要求,十五国防预研项目“嵌入式实时分布系统”要求实时相应,实现服务器容错(三个处理器冗余、处理器可以带电热插拨、处理器之间松散同步) 、网络容错(双回路冗余) 、任务容错。
Lastly , the paper proposes the architecture of a fault - tolerant rtdcs , the fault - tolerant design skeleton of the whole system , and the implementation technique of fault - tolerance of a high performance fault - tolerant server , with the presentation of the task scheduling structure figure , schedule mechanism , implementation scheme and a corresponding demonstration system , all of which will be used in the project 最后,本文针对“十五”国家重点预先研究项目,给出了实时分布容错系统的体系结构,提出了整个系统的容错设计方案及高性能容错服务器的容错功能实现技术。给出了实时分布容错系统的任务调度结构图、调度机制与实现方案,并给出了相应的演示系统。
This paper has researched mainly key technology in visualization , including the features of visualization of simulation in real - time and distributed environment , 3d modeling , scene simulation and the real - time display of real graphics , in detailed as follows : ( 1 ) it analyses the features and demands of visualization technology of simulation in real - time and distributed environment and gives the plan of realization , it has also defined a feasible software develop environment 论文主要对实时分布仿真可视化的特点、三维建模、视景仿真和真实感图形的实时显示等技术进行了研究和实现。具体工作如下: 1分析了实时分布仿真下可视化技术的特点和需求,提出在实时分布仿真环境下实现可视化的构想,确定了可行的软件开发环境; 2