摘要
利用简易被动声传感器阵列进行直升机目标定位 .定位系统由 4个成平面正四边形的声传感器阵列、多通道声信号同步采集器和 TMS32 0高速信号处理器、随动控制系统构成 .系统首先对原始声信号进行预处理 ,然后采用广义互相关时延算法估计目标方位 ,并融合多普勒频移与多测点信息对目标测距 .使方位均方差σφ,σθ≤ 1.5°,用多普勒频移集成多测点信息使目标测距均方差 σr减小到 2 0 % .
A simple practical implementation of positioning system with passive acoustic sensor arrays for localizing helicopter was presented. The system was composed of four acoustic sensors with a squared configuration, a multi channel synchronous signal collector, a high speed DSP, and servo control mechanisms. The correlation method for orientation estimation and Doppler based ranging estimation were also introduced. The experimental result showed that the system could reach a reasonable accuracy in many applications.
出处
《北京理工大学学报》
EI
CAS
CSCD
2000年第3期338-342,共5页
Transactions of Beijing Institute of Technology
关键词
被动声探测
声定位
信号处理
直升机
目标定位
passive acoustic detection
acoustic position
signal processing
anti helicopter
