摘要
飞机自动着陆 GPS 导航系统采用差分法消除基准站和飞机接收机的 GPS 误差。基准站和飞机接收机从卫星接收 GPS 信号,测得各自 GPS 坐标并通过 α-β 滤波器滤除噪声误差,再将基准站坐标与精确坐标比较得到差分修正值。飞机坐标减去差分修正值即为较精确的飞机坐标。利用 GPS 的地心坐标将其转换为当地坐标,则可设计出任意着陆的空间三维基准路线,通过控制律使飞机跟踪基准路径自动着陆。数字仿真验证了系统鲁棒性。
The GPS error of datum-station and airplane receiver was eliminated with difference method in GPS-navigating system for airplane automatic landing. Datum-station and airplane receiver received the GPS signal from satellite, and measured each GPS coordinate and the noise error was filtered by α-β filter. Then the difference correction value was gained by comparing the datum-station coordinate and exact coordinate. The airplane coordinate subtracted the difference correction value to gets the exact coordinate. The geocentric coordinate of GPS was transformed to local coordinate, the 3D space datum route of random landing was designed, and made airplane automatic landing by tracking the datum route by control rule. The robustness of system was verified by digital simulation.
出处
《兵工自动化》
2004年第6期1-2,5,共3页
Ordnance Industry Automation
关键词
GPS导航
自动着陆
差分修正
滤波器
GPS-navigating
Automatic landing
Difference correction
Filter
