摘要
嵌入式大气数据传感器系统通过在飞行器各部位的压力传感器阵进行工作,当大气密度较低时,压力传感器延迟时间过长,致使FADS测量精度减低,甚至无法正常工作。通过对压力传感器延迟产生的机理进行分析,提出相位超前校正网络延迟补偿的方法,合理选取超前校正网络参数,并适当减小连接压力传感器与机体表面的细管长度,可以有效减小传感器延迟,使FADS的可使用空域由35km增大到60km。相位超前校正网络延迟补偿方法具有效果明显且易于工程实现的优点。
The flush airdata sensing system （FADS） works through a matrix of pressure sensors installed on each part of the vehicle. When the atmosphere density is quite low, the measuring accuracy of FADS is reducing and even can not work because of the too long time delay of the pressure sensors. The mechanism of the time delay caused by the pressure sensors is analyzed and the time delay compensation method of the phase - lead corrective network is presented. Selecting reasonably the parameters of the phase - lead corrective network and reducing suitably the length of the narrow tube combining the pressure sensors and the engine block surface can reduce the time delay of sensors effectively and increase the available airspace of FADS from 35kin to 60kin. The time delay compensation method of the phase -lead corrective network can achieve obvious effects and is easy to implement in engineering.
出处
《航天控制》
CSCD
北大核心
2008年第6期12-15,共4页
Aerospace Control
基金
空间智能控制技术国防科技重点实验室基金(编号:SIC07030201)
