Alternative letdown guidance strategies are examined for landing of a VTOL aircraft onboard a small aviation ship under adverse environmental conditions. Off line computer simulation of shipboard landing task is utilized for assessing the relative merits of the proposed guidance schemes. The touchdown performance of a nominal constant rate of descent (CROD) letdown strategy serves as a benchmark for ranking the performance of the alternative letdown schemes. Analysis of ship motion time histories indicates the existence of an alternating sequence of quiescent and rough motions called lulls and swells. A real time algorithms lull/swell classification based upon ship motion pattern features is developed. The classification algorithm is used to command a go/no go signal to indicate the initiation and termination of an acceptable landing window. Simulation results show that such a go/no go pattern based letdown guidance strategy improves touchdown performance.
VTOL Shipboard Letdown Guidance System Analysis
1983
60 pages
Report
No indication
English
Aircraft , Aeronautics , Avionics , Aircraft guidance , Computerized simulation , Flight paths , Landing simulation , Marine technology , Weather , Computation , Computer programs , Data acquisition , Equations of motion , Histograms , Lateral stability , Mathematical models , Pitch (Inclination) , Yaw
VTOL shipboard letdown guidance system analysis
NTRS | 1983
|Ship motion pattern directed VTOL letdown guidance
NTRS | 1983
|VTOL controls for shipboard operations
NTRS | 1983
|