A brief synopsis is presented which summarizes the development tasks, simulation projects, and testing program of the Landing Period Designator (LPD) helicopter recovery aid. The LPD, an empirical formulation, relates real-time ship motion to safe recovery times of a given aircraft-ship combination. The 'proof-of-concept' testing program required satisfaction of three criteria. The index must be sensitive to different aircraft and ship models for given sea conditions. Second, the energy index trace from a low to a high energy state must never violate a given motion time delay (termed rise-time). For a destroyer class ship the time is about 5 seconds. Third, for a given sea condition, the energy index response using simulated data must approximate recorded ship motion index response. Program results supported all three test hypotheses. Most importantly, the energy index peak always maintained a 5 second time separation from the first aircraft sensitive ship motion peak. The LPD testing program consists of an algorithm analysis phase, LPD assembly response studies in a laboratory environment, and at-sea investigation.
The development, simulation and testing of the Landing Period Designator (LPD) helicopter recovery aid
Die Entwicklung, Simulation und Erprobung einer Hubschrauber-Landeabfanghilfe durch Bestimmung des Landevorgangs
Forum, Annual Forum, American Helicopter Society, 50 ; 2 ; 739-750
1994
12 Seiten, 12 Bilder, 3 Tabellen, 17 Quellen
Aufsatz (Konferenz)
Englisch
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