Fidelity standards are required for simulation of shiphelicopter launch and recovery flight envelope testing. A process is proposed to determine appropriate standards in which simulation fidelity is measured by decomposing the overall system into constituent elements and estimating fidelity standards for each element. The estimated standards are confirmed by conducting launch and recovery maneuvers in a simulator and comparing the results against flight test. The application of the process by the Joint Shipboard Helicopter Integration Process (JSHIP) Dynamic Interface Modeling and Simulation System (DIMSS) is presented. A ship/helicopter simulation was built for DIMSS at the Vertical Motion Simulator, NASA Ames, comprising models and subsystems that were selected by using estimated fidelity standards. Shipboard flight tasks were conducted for varying simulation fidelity levels and results were compared against an extensive validation database, collected during at-sea tests using an instrumented UH-60A Black Hawk helicopter aboard an LHA class ship. The selection of appropriate metrics with which to characterize subsystem and overall simulation fidelity is discussed, and examples of comparisons with flight test data are presented. The interdependency of individual models and subsystems and the necessity to develop task-specific fidelity standards are emphasized.

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