双机协同定位误差分析的研究

Error Analysis in Dual-Aircraft Cooperative Locating

测向交叉定位技术是协同定位常用方法,针对双机协同测向交叉定位算法及其定位精度进行理论研究和仿真分析。首先给出了交叉定位造成的模糊区的计算方法,并进行仿真;而后重点对测向定位精度进行分析,给出定位算法和误差计算公式,并针对不同载机间距和间距误差、测角误差下的目标GDOP的分布进行了仿真分析。仿真结果表明,定位误差随着间距误差、测角误差的增大而增大,随着双机间距的增大先减小而后增大。

Locating based on angles of arrival t is the fundamental method in cooperative locating. The algorithm and accuracy of cross locating were analyzed. Firstly, a method for calculating the locational ambiguity region was given, and simulation was made. Then, the accuracy of cross locating was analyzed, the locating algorithm and error calculating formulas were given. Simulations were made for distribution of target GDOP with different distance between two aircrafts, different aircrafts interval error and bearing error. Simulation results show that the locating error increases with the ineraese of aircrafts interval error and bearing error, but as the distance between two aircrafts increase, it will tend to decrease firstly and then to increase.