All its properties make it best suitable for the system diagnosis which involves examining 13 analog signals , detecting several digital signal s , issuing the required instructions at an exact pace and sampling many analog signals simultaneously 在硬件设计中选用了pc / 104模块及多功能数据采集模块。实现了加速度计频差信号的动态频率测量、多通道模拟信号的高速同步采样。
When complex fault occurs or uncertain factors appear such as mal - operation , miss operation and missing messages because of channel disturbance , the existing power system diagnosis methods base on switch and protection messages does not provide satisfactory result , so it is necessary to use a new source of information 在电力系统发生复杂故障或开关、保护存在较多误动、拒动以及因通讯中断而发生信息丢失等诸多不确定因素的影响下,目前基于开关和保护信息的诊断方法已经不能取得令人满意效果,必须寻找新的信息源。
The content of the electricity transforming of the system with profibus includes the designing of signal detecting and dealing system , the developing of the major cache unit machine control , the integration of the system diagnosis and data information , and the subordinate station diagnosis function 基于profibus现场总线技术的滤棒储存输送系统电气改造设计内容,主要从系统信号检测与处理方式的改进设计、主体缓冲单元电机控制方式的改进设计、系统诊断及生产过程数据信息的集成设计和系统从站诊断功能设计等几个方面讲解。
System diagnosis and componentsdiagnosis can query the fault cause or fault place according to the visible fault phenomenaand can query the solving methods according to the cause and the pla ce . expert systemdiagnosis adopts man - computer dialog piatform , producing method , fault tree analysis andforward chaining . the user of hydrauiic equipment can eliminate the malfunction by thediagnosis of the software according to the visible phenomena 其中系统诊断和元件诊断能够根据所需诊断系统(或元件)的故障现象诊断出可能的故障原因或部位,再根据找到的部位查得故障的排除方法;专家系统诊断采用了人机交互式界面、产生式规则表示法、故障树的诊断模型、深度优先搜索法和正向推理策略。