飞机发动机滑油在线监测系统电流源设计  

Design of a current source applying to the on-line monitoring system for airplane engine lube oil

作　　者：郝魁红[1] 李斌[1] 

机构地区：[1]中国民航大学航空自动化学院,天津300300

出　　处：《电子设计工程》2014年第5期102-104,共3页Electronic Design Engineering

基　　金：国家自然科学基金青年基金项目(61102096;61201350);天津市自然科学基金面上资助项目(11JCYBJC06900);中国民航大学科研启动基金(2013QD01S)

摘　　要：针对飞机发动机润滑油在线监测系统中传感器的负载特性,基于DDS和电流反馈放大器设计了一个程控交流电流源.由MSP430单片机控制直接数字合成芯片,驱动电流反馈放大器AD844及高频运算放大器AD811构成精确程控电流源.当电感在1～2mH,激励频率在3kHz左右时,恒流源输出8mA电流并且幅值变化小于1％.In allusion to the load features of the transducer of on-line monitoring system for airplane lube oil,a stored program control interchange current resource based on DDS and current feedback amplifier was designed.A SCM named MSP430 controls the direct digital synthesis and drives the current feedback amplifier called AD811 and AD844 to build an accurate stored program control current resource.When the inductance is selected 1mH ～ 2mH and the excitation frequency chooses 3kHz,the constant current resource＇ s export current can achieve 8mA and the changes of amplitude less than 1％.

关 键 词：滑油在线监测 MSP430单片 机直接数字合成 VCCS 

分 类 号：TN710[电子电信—电路与系统]