机上电缆分布参数干扰设备精度检测分析  

Studying on Precision Measurement of Airborne Cable Distributed Parameter Interfere Equipment

作　　者：刘新[1] 周代忠[1] 温前 

机构地区：[1]西北工业大学电子信息学院,陕西西安710072 [2]贵州飞机设计研究所,贵州安顺561000

出　　处：《计测技术》2005年第6期49-50,共2页Metrology & Measurement Technology

摘　　要：在某型飞机的试飞过程中,发现大气数据传感器的输出信号在传输线上,有分布电容对其进行干扰而产生自激,影响了传感器的数据精度。经过分析和对比试验,提出了在成品设备直流输出高、低端各接一级消激电路,来消除分布电容引起的自激干扰,提高成品设备的抗干扰能力。通过机上试验,验证了该方法的有效性。It is found that the data precision of atmosphere data sensor is affected during the test-fly of a certain plane. The reason for this is that sensor＇s output signal on the transmission cable brings on a self-excitation caused by distributed capacitance. By contrast experiment, a solution is proposed that the self-excitation interference can be eliminated by connecting a eliminate circuit at both direct current high and low carry-out terminal of shelve-off equipment in this paper. The method can improve the antijamming ability of finished product. Finally, its validity is verified by experiments.

关 键 词：任务计算机 分布电容 自激干扰 精度 

分 类 号：TP212.6[自动化与计算机技术—检测技术与自动化装置]