摘要
为了研究飞机大气数据系统全、静压管路结构中压力引入口与传感器的距离对信号延迟的关系,构建了管路压力延迟特性测试系统.建立管路压力传递的数学模型,求得其传递函数,应用MATLAB进行仿真,计算出2类典型情况下的管路压力延迟理论值.然后依据测试系统气压源的高精度要求,采用压电阀作为压力调节元件,应用PID控制算法进一步提高压电阀的动态压力性能,并据此设计搭建了管路延迟特性测试系统.最后运用互相关算法计算系统压力延迟时间,与理论延迟进行对比分析.实验结果表明:该测试系统测得值能较好反映模型管路压力滞后情况,并提高了延迟时间测试精度.
The object of this article is to study the relationship between the pipeline lag and the distance of the pressure input to the sensor in the Pitot-Static system. A mathematic model grounded on transfer function is established to calculate the theoretical pipeline lag in Matlab simulation. According to the requirement of high precision pressure at the injection port,the system uses a piezoelectric valve for pressure adjustment. Additionally,In this system PID( proportional-integral-derivative) algorithm is used as the pressure controlling algorithm. The lag was measured and analyzed based on the cross-correlation algorithm and compared with the theoretical lag. The experiment results show that the system can test the lag better,and the measurement precision is improved.
出处
《东南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2010年第S1期321-325,共5页
Journal of Southeast University：Natural Science Edition
