Comparison of the NAVTOLAND (Navy Vertical Takeoff and Landing) SH-2F Helicopter Model with the Requirements of MIL-H-8501A and with Flight Data

摘要

This report compares the dynamic response characteristics of an SH-2F simulator model with available flight test data and with the requirements of MIL-H-8501A, Helicopter Flying and Ground Handling Qualities; General Requirements for. The Navy Vertical Takeoff and Landing (NAVTOLAND) simulator model was developed to facilitate the design of an automatic approach and landing guidance control systems for helicopters and V/STOL aircraft. The simulation was validated by comparing the model response with all available flight test data. In addition, the model was used to examine some of the requirements of MIL-H-8501A. Considerable insight was gained in the application of the specification and in understanding techniques needed to determine compliance with the requirements. The original model was developed and installed on the NASA Ames Vertical Motion Simulator. Numerous modifications were made to the software based on test pilot evaluations. A version of this simulation model including all empirical adjustments was installed on the NAVAIRDEVCEN computer system. Further evaluation of the model was carried out using this batch version of the helicopter model. This study found that it is difficult if not possible to satisfactorily tune a helicopter simulation based on pilot opinions without a complete flight test data base. The requirements of MIL-H-8501A need to be defined in more detail and in some cases be revised. An altitude excursion limit should be added to the current quick stop maneuver. Analysis indicates that the current 2-second pilot response delay following engine failure may be excessive.